Fridge circuit board making a humming sound

[Sirlen]

I have a 2007 keystone Hornet that I just bought last fall and Im having a issue with the fridge, when it’s on the propane the circuit board makes a humming sound but when its on the generator it doesn’t make a sound, any suggestions would be appreciated.

 

[CharlesinGA]

Are you sure its the circuit board, and not the gas valve that is very close by?

The board does, however, have some micro relays on it, so it could be one of those. Its all 12v power except for the current going thru one relay to the electric heat element, when cooling with shore or generator power.

Charles

 

[Sirlen]

Are you sure its the circuit board, and not the gas valve that is very close by?

The board does, however, have some micro relays on it, so it could be one of those. Its all 12v power except for the current going thru one relay to the electric heat element, when cooling with shore or generator power.

Charles

Thanks I’ll check that

 

[Kirk]

Since only 12V direct current is used when you operate on propane, it is very unlikely that the noise is electrical. Your refrigerator may have a ventilation fan that could be the cause of the sound.