Evaporator Drain tubes routing/location on carrier Reefer

Discussion in 'Refrigerated Trucking Forum' started by Dionicio0911, Aug 31, 2019.

  1. Dionicio0911

    Dionicio0911 Bobtail Member

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    just bought a Reefer trailer with a carrier 2100A unit. Having problems with it getting to -5 degrees. I think the evaporator drain tubes are clogged up causing the evaporator to consonantly ice over. I’ve ran wire in the tubes no luck with that. I opened the front drain hole on the trailer floor and there is lots of ice . I’m guessing the water from defrost is leaking back into trailer. I have a load on it now. What is the best approach to seeing if the tubes are disconnected or clogged from beginning of the evaporator? Thanks
     
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  3. lilillill

    lilillill Sarcasm... it's not just for breakfast

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    pull the tubes off where they connect to the evaporator box and let it run a defrost cycle. Wear gloves... the refrigerant lines by the battery side drain will be hot.
     
  4. lilillill

    lilillill Sarcasm... it's not just for breakfast

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    Also, what year is the box? Were you able to get it below -5 previously?
     
  5. Dionicio0911

    Dionicio0911 Bobtail Member

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    It’s a 2011, and yeah got it down to -10 before we bought it. I’ll try disconnecting the tubes. I see water on wall draining down inside the engine compartment when it’s defrosting but it’s very little .
     
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  6. Dionicio0911

    Dionicio0911 Bobtail Member

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    It worked!!! I pulled the lines at the top out came a flood!! Top of the lines were clogged with leaves and junk. Probably from me trying to blow air into them to make sure they were clear pushed it all to the top and packed it! Thanks a bunch man!
     
  7. lilillill

    lilillill Sarcasm... it's not just for breakfast

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    Clean the hoses out and make sure there are nipples on the ends. The evaporator will suck warm air up the hoses if there aren't.

    The nipples will also prevent mud daubers from building nests in the tubes.
     
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  8. SalT

    SalT Bobtail Member

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    Jul 9, 2020
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    Hi. We have a thermo king and we believe are having the same issue where water is slowly draining inside the trailer wall on defrost and then leaking down the middle of the unit from the front. Has anyone experienced this with a thermo long. This only happens on defrost.
     
  9. reeferwrencher

    reeferwrencher Medium Load Member

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    It happens on all reefets if the defrost drains clogged. Just clean em out you should be fine .
     
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  10. Buckeyes614

    Buckeyes614 Light Load Member

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    Does having a clogged drain tube prevent the unit from cooling properly to -10?

    How exactly do I clean the tubes out?
     
  11. reeferwrencher

    reeferwrencher Medium Load Member

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    Pull the hoses off then go in back of trailer and remove evaporator panel.CLean out any plastic and debris under the evaporator coil.You will find 2 holes there stick a screw driver or coat through them and clear out.Go back to front of unit and clear hoses with coat hanger,put hoses back on.Get a container of water and dump it under the evaporator, make sure water is running out of hoses. Yes it will cause it to not cool properly because the water stays in the trailer and immediately freezes after it completes a defrost cycle and then blocks air flow over the evaporator. Good luck
     
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