Question about Coleman Powermate 27 Gallon Air Compressor

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Coleman POWERMATE Lo502710. Compressor runs and builds up pressure and then keeps on running even when 100 PSI. It will not shut off. I do not hear a leak when I pull the electric plug to make it stop running. KWS

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There is a problem with your pressure switch. You should have a little black box with a red lever to turn your air compressor on and off. This housing contains your pressure switch, the pressure switch sends an electrical signal to the switch to make your air compressor run. When enough pressure builds up the pressure switch activates, and breaks the signal until the pressure drops below a certain point. I will do some more research on your compressor and find out which pressure switch you need to order. i need you to find any numbers on the compressor you can, serial number, model, stock number, anything you can to help me find the part number.
Thank you for patience,
Calvin Smith

Posted on Nov 19, 2011

  • Konrad Scheel Nov 19, 2011

    From parts manual the "switch, pressure" number is 0340135
    And that is for a Coleman Powermate L052710

  • Calvin Smith
    Calvin Smith Nov 21, 2011

    I would go ahead and order the pressure switch. Make sure to leave the old one hooked up until your new one is ready to go on, then once your new one arrives, take the wires off of the old one and put them in the correlating spots on the new one. This should solve your problem.

    Calvin Smith

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