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  1. #1
    Join Date
    Jun 2009
    Location
    missouri
    Posts
    19

    Masterbilt product

    model # ckm 7-14

    Unit icing. This model is using R-12. I have never worked on anything this old before.
    box temp is at freezing (30 degrees). I can't seem to locate the thermostat anywhere. Unit should be above freezing. Defrost is actuated by an old paragon timer that shuts off in the middle of the night for an hour and a half. There is a differential pressure control on the compressor. Would this be used to control the box temp? I am at a loss. This unit is used for keeping sandwiches cool, etc.
    Any information would be appreciated.

    Thanks,
    Zorrithod

  2. #2
    Join Date
    Jan 2008
    Location
    michigan
    Posts
    1,145
    I assume that you have not done much reefer work. The answer to your question is yes.

  3. #3
    Join Date
    Jun 2009
    Location
    missouri
    Posts
    19
    Thanks Monkeyman. That's what I wanted to know.

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