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Old 07-27-2016, 08:53 PM   #11
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Does it share the same CB as the 30 amp? Ours would trip because the 30 amp would get warm, causing the 20 amp breaker that it shares (AC) to trip. You can goto Lowes/Home Depot and get another 20/20 tandem breaker ($8) and add it to your distribution panel. It basically snaps in once you have the cover off. Move the AC wire over to the new CB and button it back up. Just make sure you have everything turn off before you go poking around in the CB panel. Hope it works and its not something else. Also can try to shut everything off on your CB panel except the 30 amp incoming and the 20 amp AC breaker. It should run unless there is something wrong with the AC or CB.

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Old 07-27-2016, 09:03 PM   #12
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Where can we get one?? Lowes???@

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Old 07-27-2016, 09:09 PM   #13
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Yes, or Home Depot, any big box home improvement store. Would take your old one out and take to store w you so you get the right brand as different brands don't fit into other brand panels.
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Old 07-28-2016, 08:31 AM   #14
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I am sure someone could help you walk through taking you old breaker out over the phone. Do you have skype? You can send me a message and I would be happy to get on the phone with you and help you get the old one out.
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Old 07-28-2016, 08:40 AM   #15
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If a new breaker doesn't solve your issue, your next step might be to blame your A/C unit. Not all units are created equal.
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Old 08-15-2016, 01:21 PM   #16
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Tripping after several minutes many times is caused by incorrectly tightened connections getting hot which increases resistance and current draw. The loose connection could be at the breaker or at the connection to the A/C.

Note that if it "gets hot" that could result in a fire.

Being a licensed general contractor since 1979, I would first check the tightness of the connection at the breaker. Next, I would replace the breaker. Many panels for residential use are only listed for the brand of breaker which was originally installed. Try to match the brand (Eaton, Siemens, GE etc.). Almost all will fit and work properly, but technically is non-compliant if a different brand is used that is not listed by the manufacturer of the panel (again in residential work). I don't know what RVIA standard require.

If the replacement breaker still pops, then next I would check the connections at the A/C. This may not be within your skill level.

Hope you can fix this with a simple tightening of a connector or new breaker.
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Old 08-18-2016, 10:13 AM   #17
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joshuajim has a good point in checking the tightness of the screw on the breaker holding the wire. At some point it would be a good idea to have someone check the amperage draw of the air conditioner when running. Mr. Dan's statement is correct in that some RV A/C units have problems from day one period. Yours could be pulling more amps than necessary to run. IF you can find someone to measure the amperage draw see if they can check the actual start up load. This is different than the running amp draw.

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