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  1. #1
    Join Date
    Aug 2006
    Posts
    2
    Just happened last night. The outside unit apparentley just kept running. Shut off the ststem from the thermostat....disconnected the thermostat...still running...finally shut off the power to the unit.

    It still comes on as soon as power is restored even though the thremostat is disconnected....

    Thanks

  2. #2
    Join Date
    Mar 2006
    Location
    Loganville, Ga
    Posts
    197
    Could be a number of things; contactor stuck closed, low voltage wire problem, either way this is something you dont want to be messing with. Time to call a pro. In the mean time, hook the t-stat back up, and just turn the power off to the system when home is cool.

  3. #3
    Join Date
    Jul 2006
    Posts
    1,091
    kick it!

    Really! I had a customer that would go outside a kick the unit to shut it down! It worked! He didn't need me... he needed a boot!

    just turn the power off to the system

    At least to the outdoor unit.

  4. #4
    Join Date
    Feb 2006
    Posts
    468
    Ditto what Rick says. If it's a contactor a sharp rap to the condensor case may well shut it down. This is one of the very few circumstances where a bit of "percussive maintenance" can do the job, if only temporarily.

    Mine did this a number of years ago and I replaced the contactor. It did it again this spring and I gave it a good whack, just with my fist - I'm not sure I'd go so far as to kick something with thin copper lines and high pressure gas...

    I added "contactor - maybe a bigger / better one this time" to my to do list, but it has behaved ever since.

    DO NOT keep operating this condenser - get somone in to service it. Lethal voltages lie therein. In addition, a compressor running without an evaporator providing load can die of severe liquid inhalation. That repair bill will almost certainly contain a comma.

  5. #5
    Join Date
    Aug 2006
    Posts
    2
    Thanks guys. Brother in law diagnosed as a sticky 24v contactor and that was it. Running OK now but putting in a new one tomorrow....

    Thanks

  6. #6
    Use a solid state relay for increased reliability.

  7. #7
    Join Date
    Nov 2005
    Location
    USA
    Posts
    529
    "percussive maintenance" LOL

    I call it the "Fonzarelli Technique" and it applies to so many repairs.
    The posts and comments made by me are in no way affiliated with any company or organization. They are simply my personal opinions.

  8. #8
    Join Date
    Dec 2004
    Location
    Derby City
    Posts
    3,964
    Hey guys, you're giving away all the 'trade secrets!' Kinda like 'rebooting' a computer. lol.
    Everyone has a purpose in life..........even if it's to be a bad example.

    Seek first to understand, before seeking to be understood.

  9. #9
    Join Date
    Mar 2006
    Location
    OK
    Posts
    2,144
    I always refered to it as Emergency Repair Procedure #1. If it doesn't work, find someone with a bigger foot. LOL
    Never knock on Death's door. Ring the bell and run, he hates that.

    Views expressed here are my own and not neccessarily those of any company I am affiliated with.

  10. #10
    Join Date
    Nov 2005
    Location
    USA
    Posts
    529
    Originally posted by John Lloyd
    Hey guys, you're giving away all the 'trade secrets!' Kinda like 'rebooting' a computer. lol.
    I'd like to re-BOOT this computer with my size 10 at times.

    As far as trade secrets goes, notice I said nothing about the wonders of duct tape and scrap ductboard...oops!
    The posts and comments made by me are in no way affiliated with any company or organization. They are simply my personal opinions.

  11. #11
    Join Date
    Jul 2000
    Location
    Louisiana , USA
    Posts
    3,280
    Originally posted by cr107
    Just happened last night. The outside unit apparentley just kept running. Shut off the ststem from the thermostat....disconnected the thermostat...still running...finally shut off the power to the unit.

    It still comes on as soon as power is restored even though the thremostat is disconnected....

    Thanks

    This is Turtle.

    Stuck Contactors !

    TURTLE

  12. #12
    Join Date
    Nov 2005
    Location
    Northern VA
    Posts
    512
    Originally posted by John Lloyd
    Kinda like 'rebooting' a computer. lol.
    Reminds me of one of my favorite tech support articles ever.. the official Apple "whack your monitor" knowledgebase entry:

    http://docs.info.apple.com/article.html?artnum=58272
    If your display is exhibiting visible thin vertical lines, you can most often break the adhesion between the grid wires by using the heel of your hand to moderately impact the side of your display under the Apple logo on the right, then left side. Using moderate force does not damage your display.

    To avoid scratching or marring the external plastics, remove any jewelry or watches before you tap the display.
    Kinda funny how indirect they are about saying "The official fix for this problem is to hit it", but that's what they mean.

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