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Old 09-02-2021, 01:31 PM   #1
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2015 fr3 30ds - AC breaker tripping

Hi, first time posting. I picked up a 2015 forest River FR3 30DS about a month ago and the house AC will no longer run - it appears the breaker has tripped. When I try to reset the breaker it immediately goes back to tripped.

Below is a picture of the tripper breaker - how do I reset it so it stays? Do I take the panel frame off, pop the breaker, and get a new one? In the picture you can see the 2nd switch from the far left is tripped - this is for the AC. When I move it up to the on position it immediately trips.

The AC thermostat on wall works/reads correctly, with the AC system on - the unit itself won't turn on because of the breaker.

Thanks, Tom
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Old 09-02-2021, 04:38 PM   #2
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The AC thermostat is 12v so bot really affected by the tripped breaker, in my experience. Do you have anything else plugged in? I would trip all the breakers if microwave, Keurig, and ac were running.
The other time the AC only tripped was when the park pedal stall went bad.
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Old 09-02-2021, 05:18 PM   #3
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Nothing plugged in extra. I did do a shutoff of all circuits, then flipped all back on. All come back on and stay on except the AC.
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Old 09-04-2021, 07:45 AM   #4
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Here is how I would troubleshoot it, with no electricity on in the coach, I would turn that breaker all the way off and then back to the on position, if it slides right back to the tripped position, replace the breaker.

If breaker stays in position, apply electricity to the coach and turn on the Tstat with no function selected, breaker should still be in proper position. Start the AC FAN only, if fan continues to run start the COOL function, if breaker trips at this point, it means the compressor is having a hard time starting and drawing too many amps.

From there you have several options, maybe a compressor hard start kit would buy you some time or a new AC unit is coming your way.
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Old 09-04-2021, 10:10 AM   #5
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Worked!

Turning breaker all the way off, and then back on, did the trick (first turning all other electric appliances off). So simple, but did not come to mind. So much to learn.

Thanks for the advice!
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Old 09-07-2021, 08:13 AM   #6
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Quote:
Originally Posted by Tom Loftus View Post
Turning breaker all the way off, and then back on, did the trick (first turning all other electric appliances off). So simple, but did not come to mind. So much to learn.

Thanks for the advice!
Great news Tom!
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Old 09-20-2021, 07:13 PM   #7
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I had a similar problem with the same yr/model. The A/C would often trip (and I know how to reset it!).

Having the 30 amp input and the 20 amp A/C on the same breaker slot generates a lot of heat in one spot. I got another 20 amp breaker and moved the A/C to a spare slot in the panel. This separates the two highest amperage circuit breakers in the coach. Haven't had a trip since.
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