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Nickkle's avatar
Nickkle
Explorer
Aug 16, 2016

Loud Noise then Breaker trips when running Airconditioner

I have a 2000 Damon Daybreak 2960 that I am having issues with. The Roof Mounted Air Conditioner runs fine on the generator, but when connected to shore power it trips the breaker for AC. If I try to reset the breaker, I hear a loud humming noise coming from underneath the motorhome. The noise is coming from a box aprox. 1ft by 1ft by 5 inches. It has a huge fan in it - which reminds me of a "water wheel" sorta.

I thought it could be the converter, but it looks like my converter and automatic transfer switch is contained at the breaker location under the bed in the back of the motorhome.

I am at a loss what this box/fan could be that is making the loud hum and throwing the breaker. All outlets and lights continue to work as they should.

22 Replies

  • Describe the "shore power", 15 amp, 20 amp, 30 amp, or 50 amp?

    Exactly what breaker is tripping?
  • Your going to need an electrician
    Sounds like somebody mounted an auto transformer in the shore line and put it under the MH
    Not a good place for electrical items
    It might be something else, but you need an electrician to take a look at it and decide
    Not a mechanic

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