we have an intertherm furnace and when we tried turning it on this year it didn’t work.
it works in air conditioner mode and the furnace will work in on mode but not auto. we thought maybe it was the thermostat and bought a new one but that didn’t help. can anyone help me?
It could be your capacitor or blower motor. Blowers have several speeds. Air conditioning moves faster than heat and on may be a different speed than auto. You could try the capacitor first and then take your blower motor to an electric motor shop to be tested.