Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Heating & Air Conditioning (https://www.askmehelpdesk.com/forumdisplay.php?f=150)
-   -   BUZZ on the outside unit of my A/C (heat pump) (https://www.askmehelpdesk.com/showthread.php?t=110929)

  • Jul 17, 2007, 06:25 PM
    NCdan
    BUZZ on the outside unit of my A/C (heat pump)
    The A/C of my heat pump is still working fine... but suddenly the outside unit started having this BUZZ when the unit is running. Everything seems to be working fine, the house is cool and the unit cycles nicely. Should I do something to prevent failure in the future? Thanks
  • Jul 17, 2007, 06:33 PM
    acetc
    This buzz is probably the contactor, if you open the panel while it is running you can detect what it is (be carefull) if it is a low voltage (24 volts) problem that can make it chatter, or dirty contacts or perhaps rusty , and yes it tells you that it is not making good contact and needs attention. Mike
  • Jul 17, 2007, 07:58 PM
    NCdan
    Do I clean the old contactor or buy a new one? Where do you buy them?? Lowe's? Are they all the same... maybe I get a number off the old one?
  • Jul 17, 2007, 08:09 PM
    acetc
    You have to buy them from a A/c supply house (WW Graingers) They are sold by amp rating and coil voltage ,also the number of poles,(count the number of the bars in the contactor that move when the contactor is operated usually one, two , or three), you can get this information from the old contactor , Mike
  • Mar 31, 2008, 02:28 PM
    bsaah
    This is a compressor problem the older the compressor the mpre warn out it gets
  • Feb 18, 2011, 08:16 PM
    Shaggyda
    I have the same problem but more of a grinding buzz. They are about a minute apart in both heat and cool. I changed the contactor, but no luck. Any other sugestions?

  • All times are GMT -7. The time now is 08:04 PM.