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  1. #1
    Join Date
    Feb 2012
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    Trane package unit shuts off at night

    Trane Model 2WCX3030A1000A, original call was wouldn't heat like it use to. Comp was tripping on high head psi in heat mode. Cleaned ID coil, brought head psi to 225 and the suction is 60. Customer called back the next day an said it shut off in the middle of the night around 3:30am an started back around 8:00am. I went back an pressures were the same, so I unplugged the outdoor ambient sensor even though it ohmed out where it should be to the ambient temp, thought it was worth a try. Customer called back next morning, same thing, shut off 3:45 an started back around 8:30. It runs perfect during the day in either mode, but shuts completely down at night, any suggestions?

  2. #2
    Join Date
    Oct 2011
    Location
    Las Vegas, NV
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    Quote Originally Posted by Jman84 View Post
    Trane Model 2WCX3030A1000A, original call was wouldn't heat like it use to. Comp was tripping on high head psi in heat mode. Cleaned ID coil, brought head psi to 225 and the suction is 60. Customer called back the next day an said it shut off in the middle of the night around 3:30am an started back around 8:00am. I went back an pressures were the same, so I unplugged the outdoor ambient sensor even though it ohmed out where it should be to the ambient temp, thought it was worth a try. Customer called back next morning, same thing, shut off 3:45 an started back around 8:30. It runs perfect during the day in either mode, but shuts completely down at night, any suggestions?
    Have you checked the t stat to be sure that the program isn't set funky for that time? If it's happening at the same time each night, perhaps the program is set to drop the temp at that time of the night. Maybe he was using the hold function, but accidentally hit the run button or something. Or maybe when you cut power to the unit to work on it, it reset the stat and it reverted back to the factory program settings.

    Sent from my PG86100 using Tapatalk

  3. #3
    Join Date
    Nov 2011
    Location
    East Side
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    what was the outdoor ambient when you had 225/60.....any idea what outdoor temp was. around 3:45 THAT MORNING??

  4. #4
    Join Date
    Feb 2012
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    Thread Starter
    Its a Honeywell non-programmable t-stat. This has been going on since Friday an the times are close to the same when it shuts off but not the exact same. The ambient has been around 56 to 64 when it's running 225/60. The temp the past few nights have been around 28 to 34.

  5. #5
    Join Date
    Jul 2006
    Location
    Prata di Pordenone
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    7,595
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    For the temps the pressure seems a little low although that should not make it shut down . If the blower motor is crapping out after a long run time could going out on high pressure

  6. #6
    Join Date
    Feb 2006
    Location
    Phoenix,AZ
    Posts
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    Quote Originally Posted by suBcools View Post
    Have you checked the t stat to be sure that the program isn't set funky for that time? If it's happening at the same time each night, perhaps the program is set to drop the temp at that time of the night. Maybe he was using the hold function, but accidentally hit the run button or something. Or maybe when you cut power to the unit to work on it, it reset the stat and it reverted back to the factory program settings.

    Sent from my PG86100 using Tapatalk
    Just curious, but do you have a HTC evo 3d?

  7. #7
    Join Date
    Jan 2012
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    Good ground?

  8. #8
    Join Date
    Feb 2012
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    Thread Starter
    The ground is fine, that's what doesn't make any sense. It runs like perfect during the day but at night between 3 an 8 it shuts completely off.

  9. #9
    Join Date
    Sep 2011
    Location
    Augusta, ME
    Posts
    135
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    Sounds Like you need to install some tattle tales on some of those safeties

  10. #10
    Join Date
    Jan 2012
    Posts
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    Circuit board? I thought it really was going to be the ground. High limit switch? Try by passing

  11. #11
    Join Date
    Nov 2011
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    Could it be going out on a low pressure switch in the middle of the night when its cold now that the indoor coil is clean which eliminated you having increased pressures due to bad airflow? Then in the morning when its warmed up some it will run again?

  12. #12
    Join Date
    Jan 2012
    Location
    USA
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    Did forced defrost work?what is line temp.?

  13. #13
    Join Date
    Jan 2012
    Location
    USA
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    mabe defrost doesn't stop, comp. does on high head.

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