Unit won't cool below 38 degrees

Discussion in 'Refrigerated Trucking Forum' started by Shtrucking64, Jun 4, 2020.

  1. Shtrucking64

    Shtrucking64 Bobtail Member

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    Jun 4, 2020
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    My carrier unit won't cool down below 38 degrees. I just had a leak repaired and freon checked and cleaned the coils. What could be the problem?
     
    truckdriver31 Thanks this.
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  3. truckdriver31

    truckdriver31 Road Train Member

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    Sep 18, 2013
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    you got the 4 corner holes plugged. your belts tight
     
  4. Professor No-Name

    Professor No-Name Medium Load Member

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    I'm not a reefer mechanic but I've had that same thing happen before. Our shop had me manually defrost it. I did that an it cycled through an back to normal operation. After that it worked fine. If that don't do it ya may have had a sensor go bad.
     
    nikmirbre Thanks this.
  5. truckdriver31

    truckdriver31 Road Train Member

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    yea that humidity will take them longer
     
  6. bzinger

    bzinger Road Train Member

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    omaha , ne
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    Hot product on the trailer ?
    Units are designed to maintain product temp not pull it down .
     
    BoostedTeg Thanks this.
  7. reeferwrencher

    reeferwrencher Light Load Member

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    Aug 4, 2018
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    Could be low on freon again.Check if the ball is floating on the sight glass on the receiver tank.Other than that it could be many causes.Tx valve,sv4,sv2,valve plates,etc.
     
    nikmirbre Thanks this.
  8. Nless81

    Nless81 Bobtail Member

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    Jul 20, 2015
    West Texas
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    7D3322A3-D808-476A-8F70-5504D375C636.jpeg
    My Reefer was set at 38° Before the controls and screen locked up like this. It turns on and starts cooling to 38° but the screen never blinks and the buttons don’t do a thing.
     
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  9. bad-luck

    bad-luck Road Train Member

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    What unit, what year unit? And hours? What product?
     
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  10. Nless81

    Nless81 Bobtail Member

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    Jul 20, 2015
    West Texas
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    I just replaced the control panel. That fixed it.
     
    truckdriver31 Thanks this.
  11. truckdriver31

    truckdriver31 Road Train Member

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    Sep 18, 2013
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    459EB95B-A2BB-4B22-8B5F-AC841666B377.jpeg 4CBC6EC8-22B5-4C23-B215-9DC53B2FB6C7.jpeg CD018C37-35F4-49EC-98FB-92586FEEBEEB.jpeg 2CD051EB-DC28-4604-9153-6E71C5309B02.jpeg 2CD051EB-DC28-4604-9153-6E71C5309B02.jpeg i just got done replacing all my ac parts. pulling a vacuum and then charging freon. happy father's day everyone
     
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