FA-92441 / HVAC thermostat control / Open access
Defrost starts in warm outdoor conditions · case 01
The heat pump runs a defrost at 55 F outdoor, dumping cold air into the house for no reason.
ROOT CAUSE
Initiation does not check the outdoor inhibit temperature.
THE FAILURE
Initiation does not check the outdoor inhibit temperature.
Unsuccessful approach: Checking the coil temperature against 50 F instead of the outdoor sensor still defrosts in warm weather.
Case contract
Heat pump time-temperature defrost sampled per minute (degrees F); samples are [compressor_running, coil_temp, outdoor_temp]. Compressor run minutes accumulate only while coil <= 32. When the accumulation reaches interval and outdoor <= 50, defrost starts that minute and the accumulation resets; otherwise the accumulation keeps growing. Defrost ends on the first later minute with coil >= 57 or when it has lasted max_minutes minutes; that minute reports normal operation. Return heat, off or defrost per minute.
Why this case matters
Residential and light-commercial thermostats make these decisions sample by sample; each defect changes equipment calls in a way that shows up as short cycling, comfort complaints or equipment stress.
1 / The failure
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(interval, max_minutes, samples):
acc = 0
defrost_min = None
out = []
for running, coil, outdoor in samples:
if defrost_min is not None:
defrost_min += 1
if coil >= 57 or defrost_min >= max_minutes:
defrost_min = None
out.append('heat' if running else 'off')
else:
out.append('defrost')
continue
if running and coil <= 32:
acc += 1
if acc >= interval:
acc = 0
defrost_min = 0
out.append('defrost')
continue
out.append('heat' if running else 'off')
return out
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['regression: scenario 2',
[4,
3,
[[True, 33, 60],
[False, 57, 20],
[True, 57, 50],
[True, 60, 20],
[True, 60, 35],
[True, 60, 50],
[True, 28, 50],
[True, 28, 20],
[True, 28, 20],
[False, 28, 50],
[True, 28, 51],
[True, 28, 35],
[True, 28, 60],
[True, 28, 50],
[True, 40, 50],
[True, 40, 50],
[False, 40, 60]]],
['heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'off']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[3,
3,
[[True, 40, 35],
[True, 40, 50],
[True, 40, 51],
[True, 40, 51],
[True, 40, 50],
[True, 40, 50],
[False, 20, 35],
[False, 20, 51],
[True, 20, 50],
[True, 50, 20],
[True, 50, 50],
[True, 56, 50],
[True, 40, 50],
[True, 40, 50],
[False, 40, 51],
[True, 40, 50],
[False, 20, 51],
[False, 20, 60],
[True, 57, 51],
[False, 57, 51]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'off',
'heat',
'off']],
['control: scenario 3',
[5,
3,
[[True, 20, 20],
[True, 20, 50],
[True, 20, 50],
[True, 20, 50],
[True, 20, 35],
[True, 40, 50],
[False, 40, 20],
[True, 40, 50],
[True, 40, 50],
[True, 33, 60],
[False, 33, 60],
[True, 60, 50]]],
['heat', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off', 'heat']],
['regression: scenario 4',
[3,
4,
[[True, 20, 50],
[True, 20, 35],
[True, 20, 60],
[True, 20, 50],
[False, 20, 50],
[True, 20, 35],
[True, 20, 60],
[True, 20, 51],
[False, 20, 20],
[True, 50, 50],
[True, 50, 50],
[False, 50, 50],
[True, 50, 35],
[False, 33, 60],
[True, 33, 60],
[True, 33, 50],
[True, 20, 35],
[True, 20, 35],
[True, 20, 50],
[True, 50, 20]]],
['heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'off',
'heat',
'heat',
'off',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost']]],
[['regression: scenario 2',
[4,
4,
[[True, 40, 50],
[True, 40, 35],
[True, 40, 60],
[False, 56, 60],
[True, 56, 35],
[True, 50, 50],
[True, 32, 35],
[True, 32, 51],
[True, 32, 20],
[True, 32, 51],
[True, 32, 60],
[True, 57, 35],
[True, 32, 50],
[True, 32, 35],
[True, 20, 35],
[True, 50, 35],
[True, 57, 35],
[True, 57, 51],
[False, 57, 50]]],
['heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'off']],
['regression: scenario 7',
[4,
3,
[[False, 32, 20],
[True, 20, 51],
[True, 56, 35],
[False, 56, 50],
[True, 56, 20],
[True, 56, 50],
[True, 56, 51],
[False, 32, 60],
[True, 32, 50],
[True, 32, 20],
[True, 56, 20],
[False, 57, 20],
[True, 57, 35],
[True, 57, 35],
[True, 57, 35],
[True, 57, 35],
[True, 28, 51],
[False, 28, 20],
[True, 28, 51],
[True, 28, 50],
[True, 40, 20]]],
['off',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'heat']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[3,
3,
[[True, 28, 20],
[True, 28, 50],
[True, 32, 50],
[False, 32, 35],
[True, 60, 20],
[True, 60, 35],
[True, 60, 50],
[True, 60, 50],
[True, 57, 50],
[True, 57, 50],
[True, 60, 60],
[False, 60, 50],
[True, 60, 35],
[True, 33, 50]]],
['heat',
'heat',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat']],
['control: scenario 3',
[3,
6,
[[False, 56, 51],
[True, 56, 35],
[False, 56, 35],
[True, 56, 35],
[True, 56, 35],
[True, 33, 50],
[True, 33, 20],
[True, 33, 50],
[False, 33, 60],
[True, 33, 35],
[True, 33, 35],
[True, 33, 50],
[True, 33, 60],
[True, 33, 35],
[True, 33, 35],
[True, 20, 50],
[True, 20, 51]]],
['off',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat']]],
[['regression: scenario 15',
[3,
6,
[[False, 28, 60],
[True, 28, 60],
[True, 28, 51],
[True, 50, 20],
[True, 50, 60],
[False, 60, 60],
[True, 60, 20],
[True, 28, 60],
[True, 28, 20],
[True, 28, 35],
[True, 28, 35],
[True, 28, 51],
[True, 28, 20],
[False, 28, 20],
[True, 28, 50],
[False, 28, 35],
[True, 28, 50],
[True, 28, 50],
[False, 33, 50],
[False, 56, 20],
[True, 56, 35]]],
['off',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'off',
'heat',
'heat',
'off',
'off',
'heat']],
['regression: scenario 20',
[3,
6,
[[True, 28, 20],
[True, 50, 35],
[True, 50, 35],
[False, 50, 50],
[True, 60, 20],
[True, 60, 50],
[True, 60, 50],
[False, 60, 60],
[True, 20, 20],
[True, 20, 60],
[False, 20, 20],
[False, 20, 35],
[True, 50, 60]]],
['heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'defrost',
'defrost',
'defrost']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[4,
6,
[[True, 33, 20],
[True, 28, 50],
[True, 56, 51],
[True, 33, 51],
[True, 28, 35],
[False, 28, 50],
[True, 28, 60],
[True, 28, 20],
[True, 40, 50],
[True, 40, 35],
[True, 40, 51],
[True, 40, 50],
[True, 28, 60],
[True, 28, 50],
[True, 50, 35],
[True, 60, 50],
[True, 57, 20],
[True, 40, 50]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'heat',
'heat']],
['control: scenario 2',
[4,
3,
[[True, 32, 20],
[True, 57, 60],
[True, 57, 60],
[True, 57, 20],
[False, 40, 51],
[True, 50, 50],
[True, 50, 51],
[True, 50, 50],
[True, 56, 60],
[True, 40, 20],
[False, 40, 35],
[True, 50, 35],
[False, 50, 51],
[False, 50, 35],
[True, 57, 35],
[True, 57, 20],
[True, 57, 20],
[True, 57, 50],
[True, 57, 60]]],
['heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'heat',
'heat']]],
[['regression: scenario 22',
[5,
4,
[[True, 28, 20],
[True, 28, 20],
[True, 28, 50],
[True, 28, 60],
[True, 28, 51],
[True, 28, 50],
[True, 28, 20],
[True, 28, 50],
[False, 57, 35],
[True, 50, 20],
[True, 50, 50],
[True, 28, 50],
[False, 28, 35],
[True, 20, 50],
[False, 20, 20],
[True, 20, 50],
[True, 40, 20],
[True, 33, 35],
[True, 33, 51],
[False, 33, 20]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'off']],
['regression: scenario 31',
[3,
3,
[[True, 50, 50],
[True, 50, 50],
[True, 40, 35],
[True, 40, 60],
[True, 20, 20],
[True, 20, 50],
[True, 20, 60],
[True, 20, 50],
[True, 20, 51],
[True, 32, 50],
[True, 32, 50],
[True, 32, 35],
[True, 50, 50],
[False, 28, 20],
[True, 50, 35],
[False, 57, 51],
[False, 57, 35],
[True, 57, 35],
[True, 57, 50],
[True, 60, 50],
[False, 60, 50],
[True, 60, 50],
[True, 57, 51],
[True, 57, 35]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[5,
4,
[[True, 57, 60],
[True, 57, 50],
[True, 57, 50],
[True, 57, 35],
[True, 33, 50],
[True, 33, 50],
[True, 32, 50],
[True, 50, 51],
[True, 50, 51],
[False, 50, 20],
[False, 33, 50],
[True, 56, 20],
[True, 32, 60],
[True, 32, 35],
[True, 32, 20]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'heat']],
['control: scenario 2',
[4,
6,
[[False, 28, 50],
[True, 28, 51],
[True, 28, 35],
[True, 28, 50],
[True, 57, 50],
[True, 57, 20],
[True, 57, 50],
[True, 57, 50],
[True, 56, 50],
[True, 56, 35],
[True, 56, 51],
[True, 56, 50]]],
['off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat']]],
[['regression: scenario 13',
[3,
6,
[[True, 28, 50],
[True, 28, 51],
[True, 56, 35],
[True, 20, 60],
[True, 28, 60],
[True, 28, 51],
[True, 57, 50],
[True, 40, 50],
[False, 28, 35],
[True, 28, 50],
[True, 28, 60],
[True, 28, 50],
[False, 28, 60],
[True, 28, 20],
[False, 28, 20],
[True, 20, 60],
[True, 20, 35]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'off',
'heat',
'off',
'heat',
'defrost']],
['regression: scenario 17',
[5,
4,
[[True, 32, 20],
[True, 32, 35],
[True, 32, 60],
[True, 32, 51],
[True, 50, 35],
[True, 50, 60],
[True, 50, 50],
[True, 50, 35],
[False, 50, 35],
[True, 40, 51],
[True, 40, 50],
[True, 40, 51],
[True, 40, 51],
[True, 50, 50],
[False, 57, 50],
[True, 32, 51],
[True, 20, 50],
[True, 56, 20],
[True, 56, 50]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'defrost',
'defrost',
'defrost']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[4,
6,
[[True, 32, 50],
[True, 50, 50],
[True, 50, 35],
[True, 57, 51],
[True, 57, 20],
[False, 57, 51],
[True, 57, 50],
[True, 57, 51],
[True, 32, 50],
[True, 32, 51],
[True, 32, 50],
[False, 28, 50]]],
['heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'heat', 'heat', 'heat', 'defrost', 'defrost']],
['regression: scenario 2',
[3,
4,
[[True, 32, 35],
[True, 32, 35],
[True, 33, 60],
[True, 33, 50],
[True, 33, 60],
[True, 57, 51],
[True, 20, 60],
[True, 20, 50],
[True, 33, 50],
[False, 33, 51],
[False, 33, 20],
[True, 33, 20],
[True, 40, 50],
[True, 40, 50],
[True, 40, 35],
[True, 40, 35],
[True, 40, 51],
[True, 28, 35],
[True, 28, 51],
[True, 33, 60],
[False, 33, 60],
[True, 56, 51],
[True, 56, 60],
[False, 56, 60]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'off']]]]
for label, args, expected in fixtures[N-1]:
check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| regression: warm outdoor inhibits | ['heat', 'defrost', 'defrost', 'heat', 'heat'] | ['heat', 'heat', 'defrost', 'heat', 'heat'] | Failed |
| regression: scenario 2 | ['heat', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off'] | ['heat', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'off'] | Failed |
| control: two defrosts | ['heat', 'heat', 'off', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat'] | ['heat', 'heat', 'off', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat'] | Passed |
| control: dry coil runtime | ['heat', 'heat', 'heat', 'defrost', 'defrost'] | ['heat', 'heat', 'heat', 'defrost', 'defrost'] | Passed |
| control: exact termination temperature | ['defrost', 'defrost', 'heat', 'off', 'defrost'] | ['defrost', 'defrost', 'heat', 'off', 'defrost'] | Passed |
| control: scenario 1 | ['heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'off', 'off', 'heat', 'off'] | ['heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'off', 'off', 'heat', 'off'] | Passed |
| control: scenario 3 | ['heat', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off', 'heat'] | ['heat', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off', 'heat'] | Passed |
| regression: scenario 4 | ['heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'off', 'heat', 'heat', 'off', 'heat', 'off', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost'] | ['heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat', 'off', 'heat', 'heat', 'off', 'heat', 'off', 'heat', 'heat', 'heat', 'heat', 'defrost', 'defrost'] | Failed |
SHA-256 / 039725b93085afd244b928bb698233c51ac42e1785c0180597ac6230528e3597
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(interval, max_minutes, samples):
acc = 0
defrost_min = None
out = []
for running, coil, outdoor in samples:
if defrost_min is not None:
defrost_min += 1
if coil >= 57 or defrost_min >= max_minutes:
defrost_min = None
out.append('heat' if running else 'off')
else:
out.append('defrost')
continue
if running and coil <= 32:
acc += 1
if acc >= interval and coil <= 50:
acc = 0
defrost_min = 0
out.append('defrost')
continue
out.append('heat' if running else 'off')
return out
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['regression: scenario 2',
[4,
3,
[[True, 33, 60],
[False, 57, 20],
[True, 57, 50],
[True, 60, 20],
[True, 60, 35],
[True, 60, 50],
[True, 28, 50],
[True, 28, 20],
[True, 28, 20],
[False, 28, 50],
[True, 28, 51],
[True, 28, 35],
[True, 28, 60],
[True, 28, 50],
[True, 40, 50],
[True, 40, 50],
[False, 40, 60]]],
['heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'off']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[3,
3,
[[True, 40, 35],
[True, 40, 50],
[True, 40, 51],
[True, 40, 51],
[True, 40, 50],
[True, 40, 50],
[False, 20, 35],
[False, 20, 51],
[True, 20, 50],
[True, 50, 20],
[True, 50, 50],
[True, 56, 50],
[True, 40, 50],
[True, 40, 50],
[False, 40, 51],
[True, 40, 50],
[False, 20, 51],
[False, 20, 60],
[True, 57, 51],
[False, 57, 51]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'off',
'heat',
'off']],
['control: scenario 3',
[5,
3,
[[True, 20, 20],
[True, 20, 50],
[True, 20, 50],
[True, 20, 50],
[True, 20, 35],
[True, 40, 50],
[False, 40, 20],
[True, 40, 50],
[True, 40, 50],
[True, 33, 60],
[False, 33, 60],
[True, 60, 50]]],
['heat', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off', 'heat']],
['regression: scenario 4',
[3,
4,
[[True, 20, 50],
[True, 20, 35],
[True, 20, 60],
[True, 20, 50],
[False, 20, 50],
[True, 20, 35],
[True, 20, 60],
[True, 20, 51],
[False, 20, 20],
[True, 50, 50],
[True, 50, 50],
[False, 50, 50],
[True, 50, 35],
[False, 33, 60],
[True, 33, 60],
[True, 33, 50],
[True, 20, 35],
[True, 20, 35],
[True, 20, 50],
[True, 50, 20]]],
['heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'off',
'heat',
'heat',
'off',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost']]],
[['regression: scenario 2',
[4,
4,
[[True, 40, 50],
[True, 40, 35],
[True, 40, 60],
[False, 56, 60],
[True, 56, 35],
[True, 50, 50],
[True, 32, 35],
[True, 32, 51],
[True, 32, 20],
[True, 32, 51],
[True, 32, 60],
[True, 57, 35],
[True, 32, 50],
[True, 32, 35],
[True, 20, 35],
[True, 50, 35],
[True, 57, 35],
[True, 57, 51],
[False, 57, 50]]],
['heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'off']],
['regression: scenario 7',
[4,
3,
[[False, 32, 20],
[True, 20, 51],
[True, 56, 35],
[False, 56, 50],
[True, 56, 20],
[True, 56, 50],
[True, 56, 51],
[False, 32, 60],
[True, 32, 50],
[True, 32, 20],
[True, 56, 20],
[False, 57, 20],
[True, 57, 35],
[True, 57, 35],
[True, 57, 35],
[True, 57, 35],
[True, 28, 51],
[False, 28, 20],
[True, 28, 51],
[True, 28, 50],
[True, 40, 20]]],
['off',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'heat']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[3,
3,
[[True, 28, 20],
[True, 28, 50],
[True, 32, 50],
[False, 32, 35],
[True, 60, 20],
[True, 60, 35],
[True, 60, 50],
[True, 60, 50],
[True, 57, 50],
[True, 57, 50],
[True, 60, 60],
[False, 60, 50],
[True, 60, 35],
[True, 33, 50]]],
['heat',
'heat',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat']],
['control: scenario 3',
[3,
6,
[[False, 56, 51],
[True, 56, 35],
[False, 56, 35],
[True, 56, 35],
[True, 56, 35],
[True, 33, 50],
[True, 33, 20],
[True, 33, 50],
[False, 33, 60],
[True, 33, 35],
[True, 33, 35],
[True, 33, 50],
[True, 33, 60],
[True, 33, 35],
[True, 33, 35],
[True, 20, 50],
[True, 20, 51]]],
['off',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat']]],
[['regression: scenario 15',
[3,
6,
[[False, 28, 60],
[True, 28, 60],
[True, 28, 51],
[True, 50, 20],
[True, 50, 60],
[False, 60, 60],
[True, 60, 20],
[True, 28, 60],
[True, 28, 20],
[True, 28, 35],
[True, 28, 35],
[True, 28, 51],
[True, 28, 20],
[False, 28, 20],
[True, 28, 50],
[False, 28, 35],
[True, 28, 50],
[True, 28, 50],
[False, 33, 50],
[False, 56, 20],
[True, 56, 35]]],
['off',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'off',
'heat',
'heat',
'off',
'off',
'heat']],
['regression: scenario 20',
[3,
6,
[[True, 28, 20],
[True, 50, 35],
[True, 50, 35],
[False, 50, 50],
[True, 60, 20],
[True, 60, 50],
[True, 60, 50],
[False, 60, 60],
[True, 20, 20],
[True, 20, 60],
[False, 20, 20],
[False, 20, 35],
[True, 50, 60]]],
['heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'defrost',
'defrost',
'defrost']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[4,
6,
[[True, 33, 20],
[True, 28, 50],
[True, 56, 51],
[True, 33, 51],
[True, 28, 35],
[False, 28, 50],
[True, 28, 60],
[True, 28, 20],
[True, 40, 50],
[True, 40, 35],
[True, 40, 51],
[True, 40, 50],
[True, 28, 60],
[True, 28, 50],
[True, 50, 35],
[True, 60, 50],
[True, 57, 20],
[True, 40, 50]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'heat',
'heat']],
['control: scenario 2',
[4,
3,
[[True, 32, 20],
[True, 57, 60],
[True, 57, 60],
[True, 57, 20],
[False, 40, 51],
[True, 50, 50],
[True, 50, 51],
[True, 50, 50],
[True, 56, 60],
[True, 40, 20],
[False, 40, 35],
[True, 50, 35],
[False, 50, 51],
[False, 50, 35],
[True, 57, 35],
[True, 57, 20],
[True, 57, 20],
[True, 57, 50],
[True, 57, 60]]],
['heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'heat',
'heat']]],
[['regression: scenario 22',
[5,
4,
[[True, 28, 20],
[True, 28, 20],
[True, 28, 50],
[True, 28, 60],
[True, 28, 51],
[True, 28, 50],
[True, 28, 20],
[True, 28, 50],
[False, 57, 35],
[True, 50, 20],
[True, 50, 50],
[True, 28, 50],
[False, 28, 35],
[True, 20, 50],
[False, 20, 20],
[True, 20, 50],
[True, 40, 20],
[True, 33, 35],
[True, 33, 51],
[False, 33, 20]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'off']],
['regression: scenario 31',
[3,
3,
[[True, 50, 50],
[True, 50, 50],
[True, 40, 35],
[True, 40, 60],
[True, 20, 20],
[True, 20, 50],
[True, 20, 60],
[True, 20, 50],
[True, 20, 51],
[True, 32, 50],
[True, 32, 50],
[True, 32, 35],
[True, 50, 50],
[False, 28, 20],
[True, 50, 35],
[False, 57, 51],
[False, 57, 35],
[True, 57, 35],
[True, 57, 50],
[True, 60, 50],
[False, 60, 50],
[True, 60, 50],
[True, 57, 51],
[True, 57, 35]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'off',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[5,
4,
[[True, 57, 60],
[True, 57, 50],
[True, 57, 50],
[True, 57, 35],
[True, 33, 50],
[True, 33, 50],
[True, 32, 50],
[True, 50, 51],
[True, 50, 51],
[False, 50, 20],
[False, 33, 50],
[True, 56, 20],
[True, 32, 60],
[True, 32, 35],
[True, 32, 20]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'off',
'heat',
'heat',
'heat',
'heat']],
['control: scenario 2',
[4,
6,
[[False, 28, 50],
[True, 28, 51],
[True, 28, 35],
[True, 28, 50],
[True, 57, 50],
[True, 57, 20],
[True, 57, 50],
[True, 57, 50],
[True, 56, 50],
[True, 56, 35],
[True, 56, 51],
[True, 56, 50]]],
['off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat']]],
[['regression: scenario 13',
[3,
6,
[[True, 28, 50],
[True, 28, 51],
[True, 56, 35],
[True, 20, 60],
[True, 28, 60],
[True, 28, 51],
[True, 57, 50],
[True, 40, 50],
[False, 28, 35],
[True, 28, 50],
[True, 28, 60],
[True, 28, 50],
[False, 28, 60],
[True, 28, 20],
[False, 28, 20],
[True, 20, 60],
[True, 20, 35]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'defrost',
'off',
'heat',
'off',
'heat',
'defrost']],
['regression: scenario 17',
[5,
4,
[[True, 32, 20],
[True, 32, 35],
[True, 32, 60],
[True, 32, 51],
[True, 50, 35],
[True, 50, 60],
[True, 50, 50],
[True, 50, 35],
[False, 50, 35],
[True, 40, 51],
[True, 40, 50],
[True, 40, 51],
[True, 40, 51],
[True, 50, 50],
[False, 57, 50],
[True, 32, 51],
[True, 20, 50],
[True, 56, 20],
[True, 56, 50]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'defrost',
'defrost',
'defrost']],
['control: two defrosts',
[3,
4,
[[True, 30, 20],
[True, 30, 20],
[False, 30, 20],
[True, 32, 20],
[True, 40, 20],
[True, 45, 20],
[True, 57, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20],
[True, 20, 20]]],
['heat',
'heat',
'off',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat']],
['regression: warm outdoor inhibits',
[2, 3, [[True, 30, 55], [True, 30, 55], [True, 30, 50], [True, 60, 50], [True, 30, 50]]],
['heat', 'heat', 'defrost', 'heat', 'heat']],
['control: dry coil runtime',
[2, 3, [[True, 40, 20], [True, 33, 20], [True, 32, 20], [True, 31, 20], [True, 50, 20]]],
['heat', 'heat', 'heat', 'defrost', 'defrost']],
['control: exact termination temperature',
[1, 5, [[True, 30, 20], [True, 56, 20], [True, 57, 20], [False, 30, 20], [True, 30, 20]]],
['defrost', 'defrost', 'heat', 'off', 'defrost']],
['control: scenario 1',
[4,
6,
[[True, 32, 50],
[True, 50, 50],
[True, 50, 35],
[True, 57, 51],
[True, 57, 20],
[False, 57, 51],
[True, 57, 50],
[True, 57, 51],
[True, 32, 50],
[True, 32, 51],
[True, 32, 50],
[False, 28, 50]]],
['heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'heat', 'heat', 'heat', 'defrost', 'defrost']],
['regression: scenario 2',
[3,
4,
[[True, 32, 35],
[True, 32, 35],
[True, 33, 60],
[True, 33, 50],
[True, 33, 60],
[True, 57, 51],
[True, 20, 60],
[True, 20, 50],
[True, 33, 50],
[False, 33, 51],
[False, 33, 20],
[True, 33, 20],
[True, 40, 50],
[True, 40, 50],
[True, 40, 35],
[True, 40, 35],
[True, 40, 51],
[True, 28, 35],
[True, 28, 51],
[True, 33, 60],
[False, 33, 60],
[True, 56, 51],
[True, 56, 60],
[False, 56, 60]]],
['heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'defrost',
'defrost',
'defrost',
'defrost',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'heat',
'off',
'heat',
'heat',
'off']]]]
for label, args, expected in fixtures[N-1]:
check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| regression: warm outdoor inhibits | ['heat', 'defrost', 'defrost', 'heat', 'heat'] | ['heat', 'heat', 'defrost', 'heat', 'heat'] | Failed |
| regression: scenario 2 | ['heat', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off'] | ['heat', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'off'] | Failed |
| control: two defrosts | ['heat', 'heat', 'off', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat'] | ['heat', 'heat', 'off', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat'] | Passed |
| control: dry coil runtime | ['heat', 'heat', 'heat', 'defrost', 'defrost'] | ['heat', 'heat', 'heat', 'defrost', 'defrost'] | Passed |
| control: exact termination temperature | ['defrost', 'defrost', 'heat', 'off', 'defrost'] | ['defrost', 'defrost', 'heat', 'off', 'defrost'] | Passed |
| control: scenario 1 | ['heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'off', 'off', 'heat', 'off'] | ['heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'off', 'heat', 'heat', 'heat', 'heat', 'heat', 'heat', 'off', 'heat', 'off', 'off', 'heat', 'off'] | Passed |
| control: scenario 3 | ['heat', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off', 'heat'] | ['heat', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'heat', 'off', 'heat'] | Passed |
| regression: scenario 4 | ['heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat', 'heat', 'off', 'heat', 'heat', 'off', 'heat', 'off', 'heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost'] | ['heat', 'heat', 'heat', 'defrost', 'defrost', 'defrost', 'defrost', 'heat', 'off', 'heat', 'heat', 'off', 'heat', 'off', 'heat', 'heat', 'heat', 'heat', 'defrost', 'defrost'] | Failed |
SHA-256 / 56a6946ce5319854cc77facc54b1ff83931fa3daf743162adeddaa380db11218
HELD IN THE MEMBER ARCHIVE
The verified repair and its recorded checks are member-only.
This mechanism has 8 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.
Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.
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Sign in to the archive ↗Verification & scope
A deterministic bounded teaching model of one thermostat or HVAC controller decision evaluated per sample. Temperatures are integer tenths of a degree Fahrenheit unless stated otherwise. The contract is a stipulated toy convention, not a claim of conformance to any manufacturer, ASHRAE guideline or code. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.
Observations recorded using Python 3.12.14 at 2026-09-29T14:51:45.794258+00:00.
Case digest / cd10559fe0c010b51c8a3c76a34498f93fc3f8daefb8d30c8223a1c4a9323285