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Our Panasonic heat pump has started to make a high pitched whining noise.

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  • nic_mike Jun 06, 2010

    Hi. The noise doesn't seem to be coming from the outside unit, but we will give your new suggestion a try.

    I really hope it isn't the bearings, we have only had it for 2 years.

    Appreciate the help.

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Hi, depending on the age of the heat-pump and how often it has been serviced, sounds like it may be the bearings in the condenser fan motor. If its a split system, its on top of the out door unit, and the same if its a package unit. Listen close to see if this is it. Most motors have sealed bearings but some you can add oil. You can get a oiler at a hardware store in a plastic bottle with a long spout, but look at your motor on the edge of the top and bottom for small removable plugs. Some are chrome and others are colored plastic you can pull out with needle nose pliers to add a few drops to the bearings. If this is not where the problem is, get back to me.
Good Luck,
Shastalaker7

Posted on Jun 05, 2010

  • 1 more comment 
  • Robert Horton
    Robert Horton Jun 06, 2010

    Hi, I havent heard back from you and wanted to say that sometimes on a pressure built un do to a dirty outdoor coil, the high pressure will get high enough on a heat-pump to make a high squeling sound also. It will stop after relieving pressure. You can take a water hose and give this coil a good cleaning outdoor unit. Carful not to mash down the fins with to much pressure. Just another though for you to try. Please let me know if I have been of help to you.

    Sincerely,

    Shastalaker7

    PS, I will be hear if you need my help.

  • Robert Horton
    Robert Horton Jun 07, 2010

    Hi, just to let you know, these condenser fan motors get a lot of use year around if it is a heat pump. It really sounds like dry bearings. I just hope that you do have a motor that you can oil the bearings. If not, you will either have to put up with it, or have the motor changed out. Even though it is only 2 years of age. I have seen them fail in 6 months! Please excuse my spelling errors on my last statement to you as I had several people I was typing to. I wish you the best of luck. You can also kill power to the outdoor unit and remove the 5/16" screws from the fan guard and check the bearings. Spin it by hand to see if it makes the noise, up and down play is normal, but any play from side to side is not good. If the motor is on the hard side to turn will indicate bearing wear.
    Sincerely,
    Shastalaker7


  • Robert Horton
    Robert Horton Jun 08, 2010

    Hi, I re-read your message and you said the noise didn't seem to be coming from the outdoor unit. Check the indoor units bearing. These will be the kind you oil but are much harder to excess un less you remove the 2 screws at the bottom, each corner and slide the assembly out. This would be the only thing in there that would make that noise. The older units were belt drive motors but you say this is only 2 years old. It would have to be the indoor unit then.
    Sincerely,
    Shastalaker7


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