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Thread: Dimming lights

  1. #14
    Join Date
    Jan 2004
    Posts
    60
    It is york Stealth HP, i don't know how it shifts
    About weak ground: doesn't it use 2 hots and no ground?

  2. #15
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,789
    A stealth stops and reverses rotation.

    It could be a weak start coponet.

    Or trouble with your electrical system.

    Have your installer/ service tech check the unit, and if its fine call an electrician.

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    How many times must one fix something before it is fixed?

  3. #16
    Join Date
    Feb 2005
    Location
    Dothan, Al
    Posts
    3,453

    alex

    As others have stated,the only way to know for sure is to contact an electrician. You may have too small wire going to outdoor unit, or a loose connection somewhere, maybe on the breaker itself. May not be anything to be concerned about, but you won't know for sure until it is checked out.
    Definitely not a ground problem.

    Richard

  4. #17
    Join Date
    Jul 2001
    Posts
    3,112
    Have you had the annual maintenance performed on you electrical panel?

  5. #18
    Join Date
    Jul 2005
    Posts
    435
    Wouldn't be surprised if a wire terminal is loose under the breaker. Wire ends are stripped and put into a screw type connection arrangement. These screws sometimes come loose and cause all sorts of problems.

  6. #19
    Join Date
    Aug 2005
    Location
    Florida
    Posts
    337
    Howdy,
    Instead of assuming its in the panel, how about having a tech come out and rule out the c/u? That way the guy isnt paying for two service calls if he calls an electrician first. It may only be worn contacts on the second stage contactor that's causing the problem, then again maybe not. Wont know until its looked at.

    It wouldnt be a bad idea to have it serviced anyways if its been awhile since it was professionally gone thru. May be some other things that need attention you dont know about that someone may find when the trained eye is applied.

    If after the sys been gone thru and it is ruled out as nothing wrong with the a/c sys, then it would be logical to have an electrician have a look and do a PM on the panel....

    Just my .02.......l8r

  7. #20
    Join Date
    Apr 2004
    Location
    NJ
    Posts
    155

    Cool

    Originally posted by beenthere
    A stealth stops and reverses rotation.

    It could be a weak start coponet.

    Or trouble with your electrical system.

    Have your installer/ service tech check the unit, and if its fine call an electrician.

    Did it always do this? If so, your service capacity may be on the low side so that when the compressor reverses, the additional amp draw is taxing the panel. Does it happen all the time, or only when you're using an electric stove, clothes dryer, etc. If it is something that recently started, the start components probably are on the way out.
    If it was always like this and doesn't trip the breaker or cause it to get hot to the touch, as a loose terminal would cause (in addition to a burnt up wire), it is probably an under sized service panel.

  8. #21
    Join Date
    Jun 2004
    Location
    Maryland's Eastern Shore
    Posts
    892
    Alright, I assumed. But, really an HVAC service technician needs to look over the equipment once a year and now would be a good time. Being that it buzzes for only a short period at the beginning of the second stage it would lead me to believe a motor load was having difficulty because only motor loads have a large in-rush amp draw, plus the overcoming of LRA. Maybe worn second stage contacts, maybe a failing start component.

  9. #22
    Join Date
    Jan 2004
    Posts
    60
    [/B][/QUOTE]
    Did it always do this? If so, your service capacity may be on the low side so that when the compressor reverses, the additional amp draw is taxing the panel. Does it happen all the time, or only when you're using an electric stove, clothes dryer, etc. If it is something that recently started, the start components probably are on the way out.
    If it was always like this and doesn't trip the breaker or cause it to get hot to the touch, as a loose terminal would cause (in addition to a burnt up wire), it is probably an under sized service panel. [/B][/QUOTE]

    It's brand new had AC unit replaced with a HP, not sure if it was doing it before

  10. #23

    local power company

    Call your local power company you might have low votage or something they might check it for free.


    regards,
    kevlin

  11. #24
    Join Date
    May 2001
    Location
    Kansas City
    Posts
    2,729
    If its brand new call the installer back out. He can check for loose connections, amp draw, and check wire size and might try changing the breaker. Its not a ground problem.

  12. #25
    Join Date
    Jul 2005
    Posts
    435
    Here's why I simply said it was the terminal strip. It's not popping the breaker, a loose wire will cause arching as he describes by the noise, the arching will cause carbon to form, which creates resistance which will cause more current, which will cause more heat. You always check the simpliest things first.

  13. #26
    Dont a 40 amp breaker seem a little small for a 4.5 or 5 ton heat pump?

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