The house I bought has a Comfortmaker Heat Pump and a Lennox gas furnace combination controlled by a Lemmox FM21 and Lennox thermostat; refrigerant coil on "heat" side of furnace. I was under the impression that when the temperature was below 40-degrees, the AUX Heat light would display (it does), the gas furnace would light (it does), and the Heat Pump would shut down (it doesn't). First, should the heat pump turn off when in AUX heat mode?
Second, I was also told I could use the gas furnace exclusively without the heat pump by switching to Emergency mode. I did so while in AUX mode (Heat Pump and Gas furnace on) and it did shut down the heat pump. However, when the heat cycle ended and restarted later, STILL in Emergency mode, the heat pump restarted! Am I correct that I should be able to run gas furnace exclusively by switching to Emergency mode? If so, what is wired incorrectly? Any help would be appreciated. Thank you.
Thanks ... Rich
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