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Thread: Capillary Tube

  1. #53
    Join Date
    Oct 2009
    Raleigh, NC
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    Quote Originally Posted by ascj View Post
    So I check it out. First I check the coils and notice a wiring mess behind the evap panel. So I clean it all up. I fire it up. It runs a 190 head, but suction drops down to 7psi. Then it slowly climbs and compressor shuts down on internal overload. I think it's a clogged cap tube.
    Slowly climbs? You should have felt around a little. Was the condenser at ambient temp over most of it's surface?

    I think you have a bad compressor.

    It takes some experience to consistently properly diagnose the differences between cap restriction, inefficient compressor, and low charge. Some companies make it a habit that anytime they find a cap tube restriction (or what they think is a cap tube restriction), they change the cap tube, compressor, and drier. This will solve the problem since they have addressed everything, including a possible short charge.

    Oh, and there is a way to size a cap tube on the fly with the system open. Read the last two pages:

  2. #54
    Join Date
    Dec 2012
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    Quote Originally Posted by Snapperhead View Post
    Google this


    I dont know if supco will clean clogged caps , it may make it worse because it loosens debris wherever its found.

    Its basically kerosene

    Your best bet is to replace drier , and cut out 5 inches of cap tube because thats usually where they clog

    Cut drier open to see what the problem was..... Wax build up , or drier self destructed internally

    If it was wax , then you need to keep cond coil clean because its getting too hot
    Thankyou for the advise. Very helpful.

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