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Old 03-20-2016, 04:57 PM   #1
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2008 27' Classic FB
Sacramento , California
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AC Circuit Breaker Trips

I have a 2009 27FB Classic with a AC/heat pump. We are on the road in Tucson and the inside 30A breaker has tripped 3 times over a few days while using the AC. The unit is blowing cold and the outside temp is about 88 deg. I am running the refer and hot water heater on electric. I just changed the refer to gas to see if AC stays on. Bad circuit breaker ? Appreciate any help since we are headed to warmer climates and need our dog to be safe.

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Old 03-20-2016, 05:03 PM   #2
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1986 31' Sovereign
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Shutting off the electric element on the wh should help enormously. You have 30 amps to start with and with the converter, water heater and reefer on electric, the start current when the AC fires up is probably exceeding that.


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Old 03-20-2016, 07:45 PM   #3
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1975 27' Overlander
Conifer , Colorado
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Your AC is likely the biggest electrical load in the trailer. It can draw over 15 amps running on high cool. It is likely protected by a 20 amp breaker.

Reduce your AC electrical load so only the AC is running and see what happens. Maybe your trailer has an "either / or" switch between the microwave and air conditioner. Ours does, so you can only run one of these appliances at a time.

You might also check the voltage the campground is providing for you. If you are at the "end of the line" and others are drawing goodly loads, the voltage may be on the low side which will exasperate the situation.

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Old 03-20-2016, 08:12 PM   #4
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Run only Ac on electric, no hot water heater or frige, have only 30 amps...
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Old 03-20-2016, 09:47 PM   #5
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1990 32' Excella
jonesboro , Arkansas
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30 amps should be enough to run refer and ac. Some times the breaker gets hot under heavy load. Try opening the compartment to help cool. Also just a way to lighten the elec load. I took a #12 20 amp 50 ft cord,and brought it into the trailer thru the back bumper and ran it thru the base cabinets and compartments.installed a plug by the h/w heater,carried it on thru to the base of the kitchen cab and up to the micro wave..when it's hot and the AC is working hard I plug the HW into it. I installed a priority switch by the microwave and can switch the microwave from the trailer elec to the back up cord also. I can also use it to run an extra elec htr when needed. Most campgrounds have a couple of 20 amp circuits. Also.
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Old 03-21-2016, 06:26 AM   #6
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2008 27' Classic FB
Sacramento , California
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Thanks for the ideas

I really appreciate the feedback! When running the ac I will keep the refer and hwh on gas...easy fix.
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Old 03-21-2016, 10:44 AM   #7
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2007 27' Classic FB
Ridgefield , Washington
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We have had the same problem in the past. Just having the HWH on gas seems to be enough but both can't hurt.
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Old 03-21-2016, 11:49 AM   #8
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2012 27' FB Eddie Bauer
Zurich , Ontario
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Another item to check is what is the voltage is in the trailer. If it is lower than about 100-105 volts when the A/C is running, that could be part of the reason the breaker trips, Easy to check at a 115 volt outlet.

Checked a friends trailer and his voltage was about 85 volts under load, good way to burnout the compressor motor.


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