Question about Dometic Rooftop RV Air Conditioner

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I have a Dometic 579 Series Brisk Air AC. The model Number is 57915.531. When I turn the fan on, nothing happens. If I reach up and turn the wheel blower the fan will start up and everything works. I replaced the fan motor and put on a new capacitor part # 3100248.412 was supplied. The fan still will not start on it's own. I still need to turn the wheel blower to get it started. Help!

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  • Dometic Master
  • 6,674 Answers

My sheet shows part # 3100248.420 as fan run capacitor.You may have an updated number. Check voltage outputs labeled on it are same as on old one, and double check wiring is correct, to and from capacitor. Be careful not to mistake compressor start capacitor as well. By sounds of number, it's probably the right one.

Posted on May 27, 2010

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Posted on Jan 02, 2017

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SOURCE: Dometic Air conditioner model 57915-531 blows hot air

Have freon and compressor checked out, could also be bad capacitor

Posted on Aug 11, 2009

motor1258
  • 6674 Answers

SOURCE: Rooftop RV Air Conditioner: replaced capacitor on dometic 59516-531 steal trip...

You need to borrow a clamp on style amp gauge, and check amp draw on black wire in box where hydro wires connect. (PLEASE, be careful, and if not experienced in this type of test, don't try it, due to likelihood of getting a shock. ) If it's the compressor kicking in that's causing the breaker to trip, and capacitor is good, then it's usually a problem with either low incoming (supply) 110-120 AC voltage, which will cause high amperage draw, or compressor on it's way out causing high amp draw. If it's only drawing 15-18 amps, and your tripping a 20 amp breaker, then breaker is getting weak.

Posted on Jun 05, 2010

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