If you swapped the suspect 2-wire non-programmable with the known good 2-wire programmable from the bathroom and it works properly, there is no other conclusion. The 2-wire non-programmable is broken.

We expect this model to perform similarly to the tested Robert Shaw 9825I2 although it may differ in price and features. The ease of manually controlling the thermostat's temperature set-point, ...

Unlock to see our ratings and compare products side by side The ease of manually controlling the thermostat's temperature set-point, heating/cooling schedule, home/away and vacation features - when ...