can you use a Honeywell TH6220D programmable thermostat on an EWC-ST-2D HVAC - not heat pump
If yes - I need a wiring diagram to show where the B and O wires are connected. 6 wires available.
They were connected and are referenced on our wiring diagram at the furnace. We won't have 2 zones if they are not connected.
OK - good to know. The local HVAC guy recommended this thermostat, so I guess he was wrong. We cannot get it to work. Will try to exchange it with the electrical supply company.