Trane Heat Pump

Old 06-17-06, 07:53 PM
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Question on blinking light on Trane Heat Pump

My daughter's home has a Trane heat pump. The outside unit's fan quit turning today. There is a humming sound coming from the compressor. There is also a blinking red light on the circuit board on the outside unit. I took the top cover off and the fan motor is not hung up and does not feel restricted in any way. The inside unit blows fine. The home is located in the south, so the units are mainly used for cooling. What does the blinking red light mean?

Last edited by pfranks; 06-18-06 at 05:22 PM.
Old 06-19-06, 07:52 AM
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Is it blinking steadily or in a pattern for a code? What is the model number of the unit? Do you see any internal fuses to check?
Old 06-19-06, 10:24 PM
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if the flashing is just a steady on off flash then that is normal operation. otherwise it is a code and can be checked through the service paperwork attached to the inner electrical panel, granted it is still there. if the compressor is humming periodically check to see how hot the compressor case is, more than likely it is overheated and shut down and will not come back on till cooled. if so you can cool it with a hose. check the electrical compartment to see if anything is burnt or swelled such as the capacitor causing the fan motor not to start and replace those controls first being that they are of minimal cost. Otherwise the motor will more than likely need to be replaced
Old 06-21-06, 05:36 PM
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It could also be the capacitor. The large motor for the fan needs a little extra ummpf (that's a technical term) to get it started. My heat pump had the same issue. I was able to get the fan started by giving it a little push (I used a leaf blower). Then when I looked at the capacitor I could tell it was blown - it looked a little bubbled up on the top. Also, when the fan was supposed to be running, the motor felt a little warm due the power that was going to it (but not enough to start it)

With the blinking red light, it could be that the system senses that the capacitor is bad and that it does not power the motor, in which case it wouldn't feel warm or start when you gave it a push.

I was able to replace the capacitor myself for about $20. I figured a contractor would be at least $100.

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