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Old 12-28-2015, 02:03 PM   #1
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2016 FC 25FB - Air tripping CG breaker

Issue number two on this shakedown trip - first one was the power jack. After running fine all last night, today our air conditioner unit (single) keeps tripping the breaker at the campground hookup. If I leave the air off and just run the fans with some windows open I don't seem to have any problem. It sounds like another warranty issue, which isn't good because I purchased it out of state, but I thought I would check here for any thoughts or ideas on what might be wrong - just in case there is something I can try.
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Old 12-28-2015, 02:44 PM   #2
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It sounds to me like you're overloading the 30 AMP capacity. Running the air & a powerful hair dryer or sometimes just the air & hot water tank on electric is enough to trip the breaker as it don't take much. I always turn the air off when using a hair dryer because I know what will happen. This also happened on another trailer I owned not just the Airstream.
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Old 12-28-2015, 02:49 PM   #3
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Try a different cg box.
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Old 12-28-2015, 02:56 PM   #4
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Yup, air conditioner and electric hot water will do it.
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Old 12-28-2015, 03:02 PM   #5
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Usually can't run the microwave and air at the same time especially if the cg box is weak.
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Old 12-28-2015, 03:05 PM   #6
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And sometimes the campground power supply is weak. We keep a small plug-in voltmeter in a receptacle all the time.

You may be surprised how often the voltage drops near 110 to 112 volts operating just one large current draw appliance in your Airstream, plus normal operating loads such as lights, converter/charger, fridge, etc. with 30 amp service. The lower voltage increases current flow and can trip the breaker if another appliance is turned on.

We find this more common during heavy heating and air conditioning seasons. I think it's a good idea to monitor voltage when using electrical appliances, and a plug-in voltmeter is one easy way to do it.

Otherwise, you may have a problem in the air conditioner. Check the easy stuff first.
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Old 12-28-2015, 03:11 PM   #7
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If you get neat a Camping World purchase a 50 AMP to 30 AMP pigtail. Sometimes plugging into the less used 50 AMP cg side of the box works better & is a tighter fit/better connection than the 30 AMP.
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Old 12-28-2015, 03:21 PM   #8
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Joe, good advice and that's on my "to do" list as well. The 30 amp pedestal receptacle we're using right now is old, worn and sloppy.
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Old 12-28-2015, 03:26 PM   #9
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15K BTU AC, elec water heater and microwave/hair dryer will usually trip the breaker. Put the WH on propane and try again.

As suggested, it is also a good probability that the pedestal may be to blame either due to a worn out receptacle or dodgy circuit breaker. Low CG voltage is another option.

I actually think it is rather unlikely the AC is drawing that much current.
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Old 12-28-2015, 03:35 PM   #10
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Quote:
Originally Posted by Mrjkq View Post
If you get neat a Camping World purchase a 50 AMP to 30 AMP pigtail. Sometimes plugging into the less used 50 AMP cg side of the box works better & is a tighter fit/better connection than the 30 AMP.
I've found that makes a big difference.
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Old 12-28-2015, 03:47 PM   #11
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It could also be a weak breaker switch on the 30 Amp outlet. The 50/30 adapter is a definite necessity as we have run into several campgrounds that have only 50 Amp outlets.

We have blown Lucy's breaker on several occasions, but it has most often been the breaker inside the trailer. We can usually avoid this situation by running the water heater on gas.

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Old 12-28-2015, 04:11 PM   #12
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Thanks!

Thanks all for the responses. I did have the water heater on electric, so I've switched that to gas only. The air has been back on for a while now and it seems to be okay. I also just ordered a 50 AMP male to 30 AMP female adapter from Amazon.
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Old 12-28-2015, 04:30 PM   #13
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We have found as others have mentioned, when the CG breaker is tripping it is many times the CG voltage is weak or varying. Several possibilities exist to as why. The 50-30 pigtail is a great option. I would also recommend considering the purchase of a surge protector to add which will protect you in case the opposite occurs, a spike in voltage which could do some serious damage. Another advantage is it gives you a readout of your voltage at the plug.

Good luck and enjoy your new rig.

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Old 12-28-2015, 04:35 PM   #14
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Quote:
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Thanks all for the responses. I did have the water heater on electric, so I've switched that to gas only. The air has been back on for a while now and it seems to be okay. I also just ordered a 50 AMP male to 30 AMP female adapter from Amazon.
Just a point of clarity. I run my water heater on electric while using AC all the time except during shower time as that's when the power draw is long & blows the breaker, don't waste your LP when the CG is supplying electricity.
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