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Trane Heat Pump

Had a 2 day power outage recently, heat pump has not worked since. The programable thermostat reads aux heat on.

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What caused the power outage? Check the outdoor disconnect to the condenser unit. The fuses may have blown, causing the heat pump to not function and depending on the aux. heat to carry the load.

Posted on Dec 18, 2007

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Posted on Jan 02, 2017

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Wiring seems right, but it needs to be wired like the original tstat. Meaning if W was connected to w1 on the old, that's were it goes on the new. If it was on aux heat then your wiring seems correct. If its operating the aux heat "on its own", then that's were your issue is at.(?) Also, there is a configuration menu in the new tstat. It needs to be set up for your system, heat pump, 1 cool, aux heat or 2 heat 1 cool, O should engage the reversing valve(RV=O). If you didn't write down or pic what you started with, it will be tough for you, and us, to wire your unit correctly. And there is no factory installed fuse on the outdoor. The indoor will(should) have a 3 or 5amp "blade" fuse, (car fuse but not the new smaller style, the 80's to 90's style). Its on the indoor circuit board. Hope this helps!

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Friend! All thermostat is calibrated to cut in and cut off at the end of - or + 1 degree end.
Example: If you set 23 degree, it will cut off in 21 degree and cut in @25 degree. So accordingly you set the temp.
Secondly, don't set temp near to your room temp.Minimum difference should be 3 degree. If your room temp 12 degree, set at least 15 degree for heat and if room temp 28, set at least 25 degree for cool.
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You most likely have a heat pump, the aux heat (usually electric) comes on anytime the room temperature is 4 degrees below the thermostat setting. Does the buzz go off when the aux heat lite goes out? If the aux heat does not shut off then the primary heater (heat pump) is not putting out enough heat to satisfy the thermostat. I need a little more info. Do you have a heat pump? Is it working?

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