FA-92495 / HVAC thermostat control / Member archive

Hold setpoint accepts values outside the thermostat limits · case 05

A remote or keypad hold can command 40 F or 95 F.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Thermostat hold logic; samples are [schedule_period_id, scheduled_setpoint, action] where action is None, "resume", ["temp", sp] or ["perm", sp]. A hold setpoint is clamped to 50.0-90.0 F (500-900 tenths). A temporary hold lasts until the schedule period id changes from the one in which the hold was set; a permanent hold lasts until resume. A new hold of either kind replaces the current hold. Return the effective setpoint per sample.

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.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: scenario 14	`[700, 689, 824, 824, 944, 944, 944, 527, 867]`	`[700, 689, 824, 824, 900, 900, 900, 527, 867]`	Failed

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