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Thread: Heat pump clicks but doesn't run

  1. #1
    DIY Junior Member prepper's Avatar
    Join Date
    Jan 2011
    IN, USA

    Default Heat pump clicks but doesn't run

    From an earlier post I read this: "Have a helper set the thermostat up above the ambient indoor temp and you listen to the contactor. If it has 24v and does not click that is your problem."

    Mine is running fine indoors and when temp is low enough the auxillary heats like normal but when temp isn't low enough inside fan just runs and runs, heat pump unit outside clicks about every 10 secs but nothing else, no running, no hum, nothing.

    Know I can't troubleshoot and fix myself but any chance its just a relay or something?


  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    There may be a reset switch you could try pressing on the unit. Not much more to do unless you have some diagnostic tools and knowledge. A close visual check might turn up something. For example, one year, I had a mouse electrocute itself across my main a/c contactor sometime during the winter. When I tried to turn the a/c on in the spring, nothing...the fluids had gummed up the contactor and it was frozen solid. Some liberal use of contact cleaner, and all's well again without a service call.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    DIY Junior Member tempritespokane's Avatar
    Join Date
    May 2011


    I've found that the problem happens when the thermostat/heat pump wants to go into/out of Auxiliary heat mode. Is that the case for you?

  4. #4
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Houston, TX


    hello prepper, Welcome to Terry's Forums.

    You might want to check the Breaker for the outside unit.

    Many times the Inside and outside units are on different breakers.

    The 24 Volts come from the inside, sounds like that is working, and will click the outside relay,
    but the compressor could be on a different breaker/circuit, And may not be getting power.

    Have a great Day.

    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

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