Why Won’t My Heat Pump Switch From Cooling to Heating?
Thermostat on HEAT but it still feels like the AC? Sometimes it's the O/B setting or wiring, sometimes the reversing valve—and sometimes the heat pump is heating normally. Here's
Can I Use Any Smart Thermostat With a Heat Pump?
"It's smart, so it'll work" isn't how heat-pump thermostats go. The thermostat has to control the reversing valve, staging, aux/emergency heat and sometimes communicating equipment
