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jtous2011's avatar
jtous2011
Explorer
Nov 08, 2016

Dometic Refrigerator

I have recently purchased a 1998 Keystone Sprinter 5th Wheel. I have been having problems with getting power to the refrigerator. I had tested the 12v power all the way to the thermal fuse and that is where it stops. I pressed the reset button on the fuse and it powers the system now. Now I am having a problem with the fuse continuing to trip. Not sure what to do now. Help??
  • jtous2011 wrote:
    Yes there is yellow powder around there.


    That is why thermal fuse is tripping.......overheating due to NO coolant
    No coolant due to crack tube

    Cooling unit is toast

    Time to replace cooling unit or fridge


    RV Cooling Unit Replacement Get the Amish built ones.
  • Breakers are cheap - replace it.
    If it still trips then there's another issue.
  • Any signs of yellow around the burner? The thermal fuse *could* be bad, or it could be doing its job if the unit has leaked.
  • Thermal circuit breakers are known to fail sometimes. I'd start by replacing that breaker before troubleshooting the refrigerator.
  • Thermal fuse? Never seen one in a refer circuit.
    What model of Domeric refer?
    To operate it likely will require,
    12VDC for control voltage,
    Propane or 120VAC for heat source.
    There should be a fuse at the fuse panel for 12VDC and a breaker for 120VAC. There should also be a fuse on the control board.
    If your blowing a 12VDC fuse that likely means either your control board is shorted out, or you have a frayed wire shorting to ground. Time to get your volt meter out.
    BTW if you believe the board is bad, look for a Dinosauer board. They are better built than the factory parts.