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Thread: AC Issue

  1. #1
    Join Date
    Mar 2010
    Location
    Michigan
    Age
    73
    Posts
    11

    AC Issue

    Ok so now it's getting warm out and guess what? NO AC!
    Heat and DeFrost and fan work fine...
    Self test shows no codes
    Refrigerant checks ok
    Compressor doesn't cycle
    Fuse OK
    Bypass relay the compressor runs
    relay checks OK.
    What am I missing?

  2. #2
    Join Date
    Apr 2005
    Location
    Queens NY
    Age
    48
    Posts
    12,182
    Could be a bad high pressure switch. The test it to unplug it and then use a jumper wire on the pigtail and see if the compressor kicks on.

    2003
    MERCURY MARAUDER 300A

    Build Date
    5/31/02
    Sequence#
    #363 of 7839 Black Marauders
    Dyno tested power
    450 RWHP & 405 RWTQ on 93 octane
    Best 1/4 mile time to date
    12.456@109mph
    Visit my Garage
    Blackened300a's Garage



  3. #3
    Join Date
    Apr 2004
    Location
    Greenville, SC
    Posts
    22,513
    Quote Originally Posted by Blackened300a View Post
    Could be a bad high pressure switch. The test it to unplug it and then use a jumper wire on the pigtail and see if the compressor kicks on.
    If that checks out, it could be an issue with the EATC, I ran into that with a replacement unit I tried out. Fan and control to divert to all the ducts worked fine, but the AC wouldn't energize.

    2003 300B DBP
    Build date: 6/19/03
    Number 7,792 of 7,838 - 326 of 328
    Proud member of the MM "BLUES" Bros.
    Purchased: 11/10/05
    Eaton swap by ImpalaSlayer 11-09-10

    Semper et in Aeternum, Mercurius.

    In Memory:
    2004 DTR
    Build Date 01/27/04
    Purchased 04/04/04
    Wrecked 10/19/05, R.I.P.



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