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Old 07-28-2015, 01:39 PM   #1
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Thumbs down AC Unit Keeps Blowing the Breaker...

I am frustrated and cant seem to find information on what I am doing wrong. I am plugged into my friends garage and my AC unit constantly blows the breaker in the garage. I thought at first that maybe I was running to many things, but now I make sure to turn my fridge to LP gas, unplug everything but the microwave (which I don't use when the AC is running) and even still it blows. Sometimes right away, sometimes after 10 minutes, and other times it lasts longer. No one is using the garage so there isn't anything else fighting for power.

I don't know what else to do? Its 90 degrees and the AC works great but I cant keep it going. How do I run the AC without it blowing the breaker? Do I need to plug into a different outlet maybe?

I am lost :(

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Old 07-28-2015, 01:42 PM   #2
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Do you know what else in your friend's house might be running on that circuit? It may be that you need to try a different plug.

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Old 07-28-2015, 01:47 PM   #3
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What size breaker?? 15, 20
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Old 07-28-2015, 01:50 PM   #4
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If it is a 15 amp breaker that keeps blowing, you need to find an outlet on a 20 amp breaker. ( Kitchen, Dinning Room )

I was blowing 20 amp breakers in my brothers old house but not in my daughters newer house. Breakers do go bad.
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Old 07-28-2015, 09:46 PM   #5
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If it is in the garage I would bet it's a GFI outlet. Find an outlet that is on a 20amp and non GFI.
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Old 07-28-2015, 11:04 PM   #6
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Put a meter on it and see what the voltage is, if it is down under 115 vac your compressor may be running too hot and kicking the breaker. I am in the same position and am running at 120 v the a/c yanks it down to 112 at start up, but then runs at 117 vac and then can run the other a/c on fan only just fine, also turn the temp clear down in the 60`s so it does not have to start up all the time. Enjoy the cool air. warren
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Old 07-29-2015, 04:51 AM   #7
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15A breaker is too small run these AC units.... I wouldn't keep trying to run it that way you could burn up the AC
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Old 07-29-2015, 08:28 PM   #8
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The length and size of the extension cord will have a big effect. You may have 120 volts at the wall in the garage and only 112-115 at the RV. Add the load of the AC (especially starting) and you may be 108-110 and loading the circuit breaker. (never let it get below 108volts) Another draw that you may not have counted on is the converter, if it starts drawing amperage to charge your batteries, that reduces what you have available. It does that automatically unless the converter is unplugged.

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