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07-30-2018, 10:18 PM
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#1
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Member
Join Date: Dec 2001
Location: Visalia, Ca
Posts: 62
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Air Conditioner Failed and now RV blows the breaker
A couple of 113 degree days in Paso Robles and I'm afraid the bedroom A/C finally gave up. It was working like a champ and then all of a sudden it started blowing hot air. I shut it down and waited 12 hours then tried to fire it back up. The fan blows hard but you can hear the compressor try to start and then stop. I was plugged into 50 amp all week. I come home and plug into a 30 amp plug in the garage and it blows the breaker at the garage panel. I'm wondering if the two issues are related. #1, Can the A/C be repaired cost effectively or should I bite the bullet and get a new one? #2, How should I troubleshoot what is causing the breaker to blow?
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2005 Monaco Diplomat 38PDQ (Original Owner)
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07-30-2018, 10:28 PM
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#2
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Senior Member
Monaco Owners Club Fleetwood Owners Club
Join Date: Sep 2016
Location: Manitoba, Canada
Posts: 970
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If the compressor is locked up and causing the breaker to blow you are better off with a new one. As far as I am aware compressors as not affordable to change.
Test trying to start the offending AC unit with nothing else running. If it trips the breaker !!
Good luck
Terry
__________________
2002 Monaco Windsor 40PKD. Marjorie 2.
2015 Equinox V6 Roadmaster tow setup
2019 ALP Adventurer 24DS for the short trips. April, 2021
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07-30-2018, 10:53 PM
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#3
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,403
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Perhaps it is just the start and run capacitors needing replacement. It could draw a lot of current trying to start up.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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07-30-2018, 10:57 PM
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#4
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Member
Join Date: Dec 2001
Location: Visalia, Ca
Posts: 62
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I should've noted that the breaker blows immediately after plugging into shore even though the A/C is off. So maybe not related? Its as if there is a short to ground.
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2005 Monaco Diplomat 38PDQ (Original Owner)
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07-30-2018, 11:29 PM
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#5
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Senior Member
Join Date: Jun 2016
Location: Minden nevada
Posts: 735
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Quote:
Originally Posted by Kevlar
I should've noted that the breaker blows immediately after plugging into shore even though the A/C is off. So maybe not related? Its as if there is a short to ground.
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I would try turning off all the circuit breakers then connect your shore power cord. If the house breaker doesn’t trip turn on each coach breaker till it does this should isolate your problem to the circuit causing the House breaker to trip. Yes your a/c may have a bad capacitor also.
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2002 country coach allure 32 foot dual slide 350 cummins ISC
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07-31-2018, 01:55 PM
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#6
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,403
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Quote:
Originally Posted by Kevlar
I should've noted that the breaker blows immediately after plugging into shore even though the A/C is off. So maybe not related? Its as if there is a short to ground.
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Fire up the generator and see what happens.
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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07-31-2018, 07:19 PM
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#7
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Member
Join Date: Dec 2001
Location: Visalia, Ca
Posts: 62
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Quote:
Originally Posted by Roy1
I would try turning off all the circuit breakers then connect your shore power cord. If the house breaker doesn’t trip turn on each coach breaker till it does this should isolate your problem to the circuit causing the House breaker to trip. Yes your a/c may have a bad capacitor also.
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I tried this. Turned off main breaker in coach. Plugged into Wall and breaker blows. Could it be the 50 to 30 amp pigtail? Do those go bad?
__________________
2005 Monaco Diplomat 38PDQ (Original Owner)
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07-31-2018, 07:26 PM
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#8
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Senior Member
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 4,465
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Quote:
Originally Posted by Kevlar
I tried this. Turned off main breaker in coach. Plugged into Wall and breaker blows. Could it be the 50 to 30 amp pigtail? Do those go bad?
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Check pig tail and transfer switch as well.
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Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
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07-31-2018, 07:27 PM
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#9
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by Kevlar
I tried this. Turned off main breaker in coach. Plugged into Wall and breaker blows. Could it be the 50 to 30 amp pigtail? Do those go bad?
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Yes, the pigtales can overheat and melt the insulation.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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07-31-2018, 08:04 PM
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#10
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Member
Join Date: Dec 2001
Location: Visalia, Ca
Posts: 62
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Quote:
Originally Posted by YC1
Fire up the generator and see what happens.
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AC works fine on generator. Front A/C fired right up.
__________________
2005 Monaco Diplomat 38PDQ (Original Owner)
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07-31-2018, 08:05 PM
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#11
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Member
Join Date: Dec 2001
Location: Visalia, Ca
Posts: 62
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Quote:
Originally Posted by Ljwt330
Check pig tail and transfer switch as well.
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How do I test the Transfer switch? If AC works on generator is it good?
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2005 Monaco Diplomat 38PDQ (Original Owner)
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07-31-2018, 08:10 PM
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#12
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Member
Join Date: Dec 2001
Location: Visalia, Ca
Posts: 62
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Here are some pictures of the guts of the A/C that is not working. Anything I can test here?
__________________
2005 Monaco Diplomat 38PDQ (Original Owner)
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07-31-2018, 08:11 PM
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#13
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Member
Join Date: Dec 2001
Location: Visalia, Ca
Posts: 62
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2 More
__________________
2005 Monaco Diplomat 38PDQ (Original Owner)
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07-31-2018, 08:11 PM
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#14
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Senior Member
Monaco Owners Club Fleetwood Owners Club
Join Date: Sep 2016
Location: Manitoba, Canada
Posts: 970
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Yes pigtails can and do go bad. If you have an ohm meter check between the ends while unplugged. All should should high, infinite resistance. Any resistance between them while the cord is unplugged from everything shows a bad cord.
Terry
__________________
2002 Monaco Windsor 40PKD. Marjorie 2.
2015 Equinox V6 Roadmaster tow setup
2019 ALP Adventurer 24DS for the short trips. April, 2021
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