Pennsylvania Climatemaster force stage 2 instead of aux?

Discussion in 'Maintenance and Troubleshooting' started by cwb124, Dec 16, 2016.

  1. cwb124

    cwb124 New Member

    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?
  2. urthbuoy

    urthbuoy Well-Known Member Industry Professional Forum Leader

    Is your thermostat setup for 2 Stage HP. Is your Y2 wired?
  3. cwb124

    cwb124 New Member

    I have seen it run in stage 2 previously so I guess the answer is yes.
  4. urthbuoy

    urthbuoy Well-Known Member Industry Professional Forum Leader

    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.
  5. cwb124

    cwb124 New Member

    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.
  6. urthbuoy

    urthbuoy Well-Known Member Industry Professional Forum Leader

    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.
  7. cwb124

    cwb124 New Member

    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.
  8. mrrxtech

    mrrxtech Member

    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.
  9. doctor15

    doctor15 New Member

    What thermostat do you have? Most allow you to disable aux

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