Last week I had an electrician come out to fix problem with my breaker automatically shutting off when one of the AC units switched on (the one tied to this switch on in the breaker box). It's the only switch that messes up. Guy came out and fixed it and it worked for a week until this past weekend. Electrician came back this morning and says he can't fix the problem and says it has to be the AC unit. The unit runs fine and ran fine for all last week while it was "fixed". Has anyone else seen this issue of know what might be causing it?

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Posted by DipperJones

Lafayette

Member since Apr 2014

269 posts

Posted on 6/7/16 at 9:13 am to olemissfan26

Electrician was an LSU fan.

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Posted by ThatMakesSense

Fort Lauderdale

Member since Aug 2015

14841 posts

Posted on 6/7/16 at 9:14 am to olemissfan26

Sounds like your AC is pulling too many Amps and overloading the breaker.

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Posted by boddagetta

Moulton

Member since Mar 2011

10001 posts

Posted on 6/7/16 at 9:16 am to olemissfan26

Bad relay in AC unit that periodically shorts which would cause breaker to trip. That's what I would look into first.

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Posted by Dan Bilzerian

..on my yacht or jet.

Member since Dec 2014

1864 posts

Posted on 6/7/16 at 11:14 am to olemissfan26

One of two issues:

1. AC unit is drawing excess current at startup. You can upsize the breaker, but the cable may then be undersized. Put a clamp meter on one of the AC feeders and cycle the unit on and off and monitor the current. Report with the current and the breaker size.

2. You may have an intermittent grounding issue on the AC unit which eventually means you will have to replace the outside unit altogether.

This post was edited on 6/7/16 at 11:15 am

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