I have a CM Tranquility 22 recently installed this summer. Before this fall/winter I killed the breaker on the aux heat to prevent it from running at all. Last night was coldest night of the year so far, and the thermostat was set to 69 but woke to a 64 degree house. Thermostat said it was running in stage 1 with aux heat, but obviously aux heat is not available. Can I tell the thermostat that aux heat isn't available so it will use only the geo stage 1 and stage 2 to heat the house? Or is there some detrimental effect of running in stage 2 vs. aux/electric heat?
Don't know why it was stage 1 + aux vs stage 2 + aux. It will always call for aux as it has been set up to do. It doesn't care or know that you've turned it off. To clarify, it's not aux instead of Stage 2. Your auxiliary is Stage 3 in this case.
So can I tell the thermostat that I have no aux? Any way to check and force going to stage 2 rather than aux? Came home just now and thermostat says fan auto aux heat. Would rather not wake up cold tomorrow.
If it is just aux - then something is wrong with your heat pump. It has likely locked out and aux is being used as emergency heat.
Any idea where I can look to see? There's no faults or alarms on the thermostat. House is warm. Worried about tonight. Incoming water temps are around 38 F.
Jumpering the Aux Heat terminal to the Y1 terminal is what I do since I don't have Aux Heat. It keeps the Geothermal running if it isn't in lock out. This could be a problem if you ever put the Aux Heat electrical bank back in service by closing the power breaker. The 24 vac from the Y1 terminal would then power up your Aux Heat bank by the same jumper every time the Geothermal came on. I don't have that problem since the back up is manual using a gas log fireplace.
