Results 1 to 16 of 16

Thread: Trane package unit shuts off at night

  1. #1
    Join Date
    Feb 2012
    Posts
    4
    Post Likes

    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
    Posts
    656
    Post Likes
    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
    CO
    Posts
    7,954
    Post Likes
    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
    Posts
    4
    Post Likes
    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 Italy
    Posts
    8,022
    Post Likes
    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
    3,849
    Post Likes
    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
    Posts
    63
    Post Likes
    Good ground?

  8. #8
    Join Date
    Feb 2012
    Posts
    4
    Post Likes
    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
    Post Likes
    Sounds Like you need to install some tattle tales on some of those safeties

  10. #10
    Join Date
    Jan 2012
    Posts
    63
    Post Likes
    Circuit board? I thought it really was going to be the ground. High limit switch? Try by passing

  11. #11
    Join Date
    Nov 2011
    Posts
    1
    Post Likes
    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
    Missouri, USA
    Posts
    1,956
    Post Likes
    Did forced defrost work?what is line temp.?

  13. #13
    Join Date
    Jan 2012
    Location
    Missouri, USA
    Posts
    1,956
    Post Likes
    mabe defrost doesn't stop, comp. does on high head.

  14. #14
    Join Date
    Feb 2012
    Posts
    4
    Post Likes
    Thread Starter
    Forced defrost works perfect, LED flashes 1 flash persecond and the book says that's normal operation. I understand the heat pump could be goin out on low pressure switch but wouldn't the emergency heat kick on if it did that?

  15. #15
    Join Date
    Aug 2011
    Posts
    1,449
    Post Likes
    jman84,what did u find out? is fix?

  16. #16
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    15,738
    Post Likes
    Quote Originally Posted by Jman84 View Post
    Its a Honeywell non-programmable t-stat.
    If it is one of those rectangular thermostats, with round corners, I've had them basically go insane and do odd things consistently at around the same times.
    I had one a few years ago that would cool my house down to 70 in the wee hours of the morning, even though the set temperature was 76.
    Even though the the thermostat is non programmable, I believe it has most of the same timing circuitry on its board as the programmable versions do.

Posting Permissions

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