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  1. Thank you for sharing your knowledge. I do have a question. At the 12 volt dc terminal, I get 29 ac volts, which is the same ac voltage at the Rv battery. I read that I shouldn’t get more than 6 V AC at the terminal block, as stated in a diagnostic service manual. Any suggestions on what to look for?

  2. That is quite a lot of VAC on the DC line. My guess is your converter for the coach is not filtering the AC like it should or the power board on the refrigerator is not isolating the AC like it should.
    Either will most likely need to be replaced unless you feel comfortable diagnosing and repairing circuit boards at the component level.
    If it is the converter you will see AC on all your DC lines. Most lighting and other simple components won’t mind , but sensitive appliances like the refrigerator will. To confirm this I would pull all the fuses on the DC fuse bank and check to see if you have AC voltage on the main terminal off the converters DC output while on shore power. That should confirm the suspicion.
    To diagnose the power board isolation, simply unplug it from the AC outlet and run it on propane. If the AC ripple is removed, replace the power board.
    Let me know if that helps.

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