Page 2 of 3 FirstFirst 123 LastLast
Results 14 to 26 of 28
  1. #14
    Join Date
    Jan 2010
    Location
    Toronto,Ontario Canada
    Posts
    355
    Just a thought this is all too much to take on right now gotta read and understand this stuff i dont want to cost a customer another unnecessary cost. how do i know that a defrost clock is defective?
    Get er Done!

    Do what has to be done
    when it has to be done
    as well as it has to be done
    And doing it all the time.

  2. #15
    Join Date
    Nov 2009
    Location
    Richmond, working under tarps
    Posts
    494
    You get the site, you walk around and look at the eqipment, then you write down the make, model, and serial number.

    Is it in refrigeration or defrost, then from that you troubleshoot.

    You found a frozen coil, you try to de-ice it by initiating defrost, you find it terminates upon initiation.

    what type of clock?

  3. #16
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    5,701
    Heatcraft.pdf
    Quote Originally Posted by akelesis View Post
    Just a thought this is all too much to take on right now gotta read and understand this stuff i dont want to cost a customer another unnecessary cost. how do i know that a defrost clock is defective?
    Start Reading

  4. #17
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,671
    Quote Originally Posted by akelesis View Post
    Just a thought this is all too much to take on right now gotta read and understand this stuff i dont want to cost a customer another unnecessary cost. how do i know that a defrost clock is defective?
    Simple test.

    BEFORE you touch the timer wheel, take a sharpie and mark the inner wheel of the timer inline with the time arrow.

    Wait 5 minutes.

    You'll know.

  5. #18
    Join Date
    Oct 2008
    Location
    Ohio, USA
    Posts
    177
    The first thing I like to do when suspecting defrost timers, is grab a sharpie and make a tiny mark around the minute knob on the timer. (to mark current time/position)

    I do this before I even so much as touch that knob.

    Then I come back in ~5 minutes and see if the knob has advanced any time.

    If it has moved -> Good. Advance it to the next defrost cycle and move on to other things.
    If it hasn't moved -> Bad. Replace timer.

    (What this checks is both the timer motor itself, and also the clock gearing which can get hard to turn after years of dirt, and eventually lock up.)

    As has been stated, it sounds like you replaced a timer that was maybe fine because the Defrost Term switch is bad and threw you for a loop. Chalk it up to experience and don't do it again.

    EDIT : JP - great minds think alike?

  6. #19
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,671

  7. #20
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,595
    One note I'd add here is I had a tooth strip out so it would hang up in the same spot every time. It took me tearing the timer out of the case to see it. This isn't hard to do, just takes a minute to take a peek.

  8. #21
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,151
    [QUOTE=jpsmith1cm;14249761]Simple test.

    BEFORE you touch the timer wheel, take a sharpie and mark the inner wheel of the timer inline with the time arrow.

    Wait 5 minutes.

    This is the first thing I do now as well.... That 5 minutes feels like 30 waiting to see if it moves.

  9. #22
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,671
    Quote Originally Posted by Dchappa21 View Post
    This is the first thing I do now as well.... That 5 minutes feels like 30 waiting to see if it moves.
    not if you then take a few minutes, close off the king valve and pump the unit down to start to defrost it....
    Last edited by jpsmith1cm; 09-23-2012 at 10:51 AM. Reason: fixed quote

  10. #23
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,151
    Quote Originally Posted by jpsmith1cm View Post
    not if you then take a few minutes, close off the king valve and pump the unit down to start to defrost it....
    Lol, I do this too but it still seems like time goes extra slow waiting around for the clock to move or not move...

  11. #24
    Join Date
    Sep 2012
    Location
    Harlingen, TX
    Posts
    4
    I agree with cj walker....check the defrost initiate/terminate stat..

  12. #25
    Join Date
    Sep 2012
    Location
    Harlingen, TX
    Posts
    4
    I concur w/cjpwalker. Sounds like a bad defrost ini/ter. control. grabbit an growl!

  13. #26
    Join Date
    Sep 2012
    Location
    Harlingen, TX
    Posts
    4
    oops, takin this new drug called DAMMITOL!

Page 2 of 3 FirstFirst 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event