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  1. #1
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    Apr 2012
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    Question Why AC Contactor failed?

    My 4yrs old Payne Heat Pump stopped running. I replaced capacitor and also found out that contactor (1-pole) does not pull in (remain open) even though thermostart is set to cooling. However, when pushing it to close the fan starts working but contactor does not stay closed.

    Before replacing the contactor, I would like to know why it failed. I'm not sure there is something else that caused it to stop working. Contractor said it's low in freon gas.

    Thanks for your help.

  2. #2
    Join Date
    May 2004
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    Frederick, MD
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    It

    may not have failed. There are lots of reasons why a contactor will not pull in. You should get a service tech to check the system for you. Forum rules prohibit me from elaborating on causes or going into troubleshooting.
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  3. #3
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    Apr 2012
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    Thread Starter
    Thanks gregp.
    Contractor said we need to refill gas first, then see if contactor will work again and he also suspected that compressor is shorted. Thought there is a way to verify if contactor is good before gas refill. I'm trying to avoid costly guess work.
    your thoughts please.
    thanks.

  4. #4
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    Nov 2006
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    As gregp stated, there is a reason why the contactor won't pull in. Working on your own condensing unit is not a good or safe place to be a handyman. If you don't trust your contractor then find one you do trust and let him deal with it.

    As the site rules state, no DIY help will be given here.

  5. #5
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    Nov 2006
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    Ask several friends whom they have used. They might be able to recommend a good contractor.

    You can also check our list to see if one of us is near you. Not a good chance of that, but you might get lucky.

    In point of fact, there is very likely nothing wrong with the contactor. It most likely is not being TOLD to pull in.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
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  6. #6
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    Apr 2012
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    Thread Starter
    Thanks you all for your responses. Thought it's a good idea to educate myself before hiring another contractor.

  7. #7
    Join Date
    Jun 2011
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    Central Indiana
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    Arrow

    It is very possible that the contactor would not pull in due to the low charge. If the unit is equipped with a low pressure switch that cuts out the low voltage signal, the contactor will not pull in. I would advice locating the leak before charging but that aside, the contractor may be correct in telling you that the charge must be adjusted. There are ways of testing a contactor but we can not detail that on this site.
    The only true knowledge is the pursuit of knowledge

  8. #8
    Join Date
    Mar 2005
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    Quote Originally Posted by k5821 View Post
    Thanks gregp.
    Contractor said we need to refill gas first, then see if contactor will work again and he also suspected that compressor is shorted. Thought there is a way to verify if contactor is good before gas refill. I'm trying to avoid costly guess work.
    your thoughts please.
    thanks.
    your answer is in this statement you have just made
    fill the system isnt the true answer but will stop the saftey from not alowing the contactor to pull in till it is empty again
    find the leak fix the leak and then enjoy your ac

    contactor is not your problem
    call a pro

  9. #9
    Join Date
    Jul 2006
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    Prata di Pordenone
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    Thumbs down

    Quote Originally Posted by k5821 View Post
    Thanks gregp.
    Contractor said we need to refill gas first, then see if contactor will work again and he also suspected that compressor is shorted. Thought there is a way to verify if contactor is good before gas refill. I'm trying to avoid costly guess work.
    your thoughts please.
    thanks.
    You need a new contractor

  10. #10
    Join Date
    Nov 2006
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    Quote Originally Posted by k5821 View Post
    Thanks you all for your responses. Thought it's a good idea to educate myself before hiring another contractor.
    Okay. Now..

    1) Check our list to see if one of us is near you. Unlikely, but still worth a look.

    2) Ask friends you trust who they have used in the past.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







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