Page 1 of 2 12 LastLast
Results 1 to 20 of 23

Thread: NEW HERE NEED HELP WITH SHORT PROBLEM ON AIR HANDLER

  1. #1
    Join Date
    Aug 2022
    Location
    PSL, FL
    Posts
    1
    Post Likes

    Lightbulb NEW HERE NEED HELP WITH SHORT PROBLEM ON AIR HANDLER

    Hello,

    New here. Thomas from Florida. I was installing new thermostat and caused a short while doing it as I forget to turn off the power wiring. I didn't have a breaker in the line on the R so I replaced the transformer (and put in breaker relay in the line) since it didn't hold current on the 24v side and replaced the fan relay as well. I also installed new run capacitor since my unit is a RUDD 18 year old air handler with no board (all collectively costing me less than dollars for all OEM Ruud parts). I can jump the red with the yellow at the thermostat site and shoots out cold air and same with red and white with heat but when I do it with red and green (fan) it shorts and pops my inline breaker. I tried switching to the blue line in the thermostat wires to rule out if it was a bad green wire but it still shorts with the green to the air handler. Seeing if this is just wiring needing to be replaced as this air handler is pretty simple. Just can not find this short when green and red jump. Any help would be appreciated as I'm about to just replace the green wire throughout.
    Attached Images Attached Images   

  2. #2
    Join Date
    Jan 2006
    Location
    In a land far, far away
    Posts
    17,865
    Post Likes
    Moved to AOP, this is the homeowner section. Please note new location.

    Also removed pricing, that is not allowed per site rules.

  3. Likes tjglock liked this post.
  4. #3
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    40,408
    Post Likes
    That’s a lot of parts. Maybe call someone qualified?

  5. Likes kdean1 liked this post.
  6. #4
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    9,975
    Post Likes
    Did you try replacing the evaporator coil?

  7. Likes BBeerme, kdean1, HVAC_Marc, BALloyd liked this post.
  8. #5
    Join Date
    Aug 2009
    Location
    Beatrice, NE
    Posts
    17,586
    Post Likes
    I read where you shorted the control wires, I didn't read where you tested to see what if anything was damaged. Then I read where you replaced a bunch of cheap parts, which from reading your account is where the short started.

    You say that R-Y shoots out cold air but R-G kicks the breaker. R-Y should kick out no cold air as the blower is not energized through Y.

    It sounds like you need someone to go through all your wiring to see where things went wrong.

  9. #6
    Join Date
    Dec 2002
    Location
    Houston,Texas
    Posts
    21,883
    Post Likes
    Quote Originally Posted by hvacvegas View Post
    Did you try replacing the evaporator coil?
    Hey! no DIY advice here. Name:  image023.gif
Views: 224
Size:  12.9 KB
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law

    "It's what you learn after you know it all that counts." ~ John Wooden

    "When the teachers become unteachable we're all in trouble" ~ Mr. Bill

    "Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill




  10. Likes 2sac, vin lashon, kdean1, VTP99, BALloyd liked this post.
  11. #7
    Join Date
    Oct 2002
    Location
    Plano, TX
    Posts
    2,533
    Post Likes
    Pull all the low voltage wires off. Rewire like schematic shows. Except stat Check operation at stat subbase. Then add the NEST "c" wire adapter back. This is simple

  12. #8
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    18,854
    Post Likes
    Where's the water on the right side of the cabinet coming from?
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Why is it that those who complain the most contribute the least?
    MONEY CAN'T BUY HAPPINESS. POVERTY CAN'T BUY ANYTHING

  13. #9
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    40,408
    Post Likes
    Quote Originally Posted by 2sac View Post
    Where's the water on the right side of the cabinet coming from?
    Condensation 😇

  14. #10
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    11,972
    Post Likes
    You seem to be electrical educated ....

    Get a Short Pro Tool

    https://www.globalthesource.com/prod...short-pro-tool

    (Shop around for it , prices will be all over the place)

    You pull the 24v fuse , alligator clip this Tool in its place ... if everything is fine , the unit will run ... and if there is a short the Blue LED will light up

    Remove wires until the Blue LED goes out .... now you know where your short is , and when the sort is fixed the light will go out
    Tell your Cat I said "Psst Psst Psst"

  15. #11
    Join Date
    May 2014
    Location
    Bay Area California
    Posts
    35,549
    Post Likes
    I heard they stopped making those. Even if the photo shows a Short-Pro-Tool, they will ship a 3A breaker.

    If you want a real short pro tool, need to contact R-600, he makes them.


    Quote Originally Posted by Snapperhead View Post
    You seem to be electrical educated ....

    Get a Short Pro Tool

    https://www.globalthesource.com/prod...short-pro-tool

    (Shop around for it , prices will be all over the place)

    You pull the 24v fuse , alligator clip this Tool in its place ... if everything is fine , the unit will run ... and if there is a short the Blue LED will light up

    Remove wires until the Blue LED goes out .... now you know where your short is , and when the sort is fixed the light will go out
    I do a triple evac with nitro to remove non condensables.

    I'm feelin' a little peculiar.

  16. Likes STEVEusaPA liked this post.
  17. #12
    Join Date
    Jan 2006
    Location
    In a land far, far away
    Posts
    17,865
    Post Likes
    Pros - Le's be careful of the DIY advice, please.

  18. Likes vin lashon liked this post.
  19. #13
    Join Date
    May 2014
    Location
    Bay Area California
    Posts
    35,549
    Post Likes
    Oooopsie
    I do a triple evac with nitro to remove non condensables.

    I'm feelin' a little peculiar.

  20. #14
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    9,975
    Post Likes
    I still say evaporator coil.

  21. Likes kdean1 liked this post.
  22. #15
    Join Date
    Dec 2007
    Posts
    11,851
    Post Likes
    Quote Originally Posted by hvacvegas View Post
    I still say evaporator coil.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  23. Likes kdean1 liked this post.
  24. #16
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    11,972
    Post Likes
    Those pesky evaps are definitely a pain nowadays .... but that may not be the issue ... this time
    Tell your Cat I said "Psst Psst Psst"

  25. #17
    Join Date
    Mar 2009
    Location
    Mount Holly, NC
    Posts
    8,298
    Post Likes
    I'm sorry, but diy advice is against the rules here. Best we can do is suggest you call a tech capable of determining the fault.
    Far less expensive than swapping parts, or breaking things

  26. #18
    Join Date
    May 2004
    Location
    Salt Lake City/Tooele
    Posts
    7,796
    Post Likes
    Maybe you guys know? WTH is that weird white contraption mangled amongst the wiring carnage there?

  27. #19
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    9,888
    Post Likes
    Quote Originally Posted by slctech View Post
    Maybe you guys know? WTH is that weird white contraption mangled amongst the wiring carnage there?
    That’s a device added to some thermostat kits so the HO can further screw up the wiring.
    *********
    https://www.hvac20.com/ High efficiency equipment alone does not provide home comfort and efficiency. HVAC2.0 is a process for finding the real needs of the house and the occupants. Offer the customer a menu of work to address their problems and give them a probability of success.

    Find contractors with specialized training in combustion analysis, residential system performance, air flow, and duct optimization https://www.myhomecomfort.org/


    Site member map HERE!

  28. Likes BBeerme, 2sac, Mr Bill, hvacvegas liked this post.
  29. #20
    Join Date
    Dec 2007
    Posts
    11,851
    Post Likes
    Quote Originally Posted by slctech View Post
    Maybe you guys know? WTH is that weird white contraption mangled amongst the wiring carnage there?
    Quote Originally Posted by kdean1 View Post
    That’s a device added to some thermostat kits so the HO can further screw up the wiring.
    It is an "Add-a-Wire" or whatever each mfr wants to call it.

    Allows the need of 5 wires to be operable with only 4.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

Page 1 of 2 12 LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •