I installed a new 3rd gen learning thermostat yesterday and when I switch to cooling, it turns the fan on but not the compressor for cold air,
I have a heat pump, and have connected the wires as directed by the app. I replaced the Nest again with my old Honeywell thermostat and it’s working fine.
I’ve tried swapping the Y1 and O wires, swapping the Y1 and W2 wires, switching between O and B in the Nest settings, nothing has helped. Anything else I should try?