Forum Discussion

Explorer

Mar 30, 2014

AC Help Needed!

I'm having an AC problem and need help. I have a 30amp system with 13,500 BTU Dometic AC.

-It can run fine for awhile then kick the breaker. Sometimes a couple of days before becoming troublesome.
-Before it kicks the breaker, I hear a noise inside that I think is coming from a circuit board. What is that board and is is a serviceable part?
-Doesn't matter what campground, so I say it's not available power.
-I've changed starting capacitor, no difference.

Any ideas?

Thanks

13 Replies

wa8yxm
Explorer III
Mar 30, 2014
That noise could be a relay failing. IF so it can cause the motor to suck way more current than it should thus tripping the breaker.....

Problem is you failed to include an MP3 of the noise.

A new circuit board may be on the drawing board.
donn0128
Explorer II
Mar 30, 2014
Make sure the refer is on gas. Same with the water heater. Then you should be fine.
pugslyyy
Explorer
Mar 30, 2014
The first things I would check are
1 - Is it the circuit breaker going bad?
2 - If not, the motor is likely heating up and drawing too much current. Either everything is clogged and dirty causing it to work too hard, or the bearings are going.

What does the noise sound like? Rumbling? Squeaking? Chattering? Ticking?