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.

On paper, a smart thermostat is an excellent deal, a way to gain newfound savings while making home heating and cooling easier to manage than ever through AI and remote sensors. In practice, a worry ...

In recent years, the ubiquitous home thermostat has evolved a great deal, from traditional dials and needles to electronic screens to models that can predict your HVAC needs. While basic models work ...