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10-07-2018, 05:18 AM
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#1
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Senior Member
Monaco Owners Club
Join Date: Jan 2008
Posts: 273
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Dometic roof unit 06 Signature
Turned unit on , started cooling but can smell like something is burning?? Went up top took cover off, no smell, no smoke, all seems normal. Other 2 units ok. I can run the fan only, no smell but when compressor kicks in , slight smell??i haven’t run it over 5 mins, afraid too. Not sure where to start, any thoughts or advice is appreciated.
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10-07-2018, 06:50 AM
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#2
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Senior Member
Join Date: Jul 2011
Location: Lexington NC
Posts: 1,952
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Quote:
Originally Posted by asheville
Turned unit on , started cooling but can smell like something is burning?? Went up top took cover off, no smell, no smoke, all seems normal. Other 2 units ok. I can run the fan only, no smell but when compressor kicks in , slight smell??i haven’t run it over 5 mins, afraid too. Not sure where to start, any thoughts or advice is appreciated.
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Asheville, I had a similar deal about 6 or 7 years ago. Woke up to a burning smell coming from the rear Dometic AC on my 07 Neptune. I cut off all AC and finally narrowed it down to the rear AC. Turned out it was the compressor start capacitor. When I got to it, the top of the capacitor was blown out, and smelled just like the burning smell we had noticed inside. The fan still ran fine but the compressor would not start. I ordered a new capacitor and had it overnight shipped ($$) and put it in the next day. Luckily, that fixed it.
Chad
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10-07-2018, 07:16 AM
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#3
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Senior Member
Join Date: Jan 2016
Posts: 2,186
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I would start by checking the wire connections at the breaker .
The 120 v elect connection to my A/C is in an area above the air filter
that would be a good place to check too .
Are you sure the compressor was running when you checked on the roof ?
Ray
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10-07-2018, 11:55 AM
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#4
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Senior Member
Monaco Owners Club
Join Date: Jan 2008
Posts: 273
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Chad, how do you get to the capacitor?
Ray, yes compressor was running and cooling well.
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10-07-2018, 12:03 PM
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#5
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Senior Member
Join Date: Jan 2013
Location: SASKATOON, SK CANADA
Posts: 126
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Yes as mentioned previously, I would be very confident it is the capacitor. You can access from the top of coach. We had ours go out on us 2 ears ago, changed both of them to be safe , the most used AC is the one that will go first of course, Usually . It may still run but it is weak and will blow out completely. Simple fix.
__________________
ROLLY Z. -
2006 MONACO CAMELOT PAQ, 2016 Jeep Cherokee Limited (Tow)
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10-07-2018, 02:19 PM
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#6
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Senior Member
Join Date: Jul 2011
Location: Lexington NC
Posts: 1,952
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Quote:
Originally Posted by asheville
Chad, how do you get to the capacitor?
Ray, yes compressor was running and cooling well.
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As Rolly Zimmer said, its accessed from the top. After removing the top cover there's a black box (IIRC) and its inside that box. There are 2 inside. One is for the compressor and one for fan. I cant recall which is which but I would check both and see if either are bulging on the top where the wires hook up. Be cautious as those things hold a pretty fair amount of juice and can zap you. HTH
Chad
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10-07-2018, 02:48 PM
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#7
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Senior Member
Join Date: Jan 2016
Posts: 2,186
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X2 on the capacitor holding a charge .
Down on the ground it might just knock the xxxx out of a fella
Up there you might make an unplanned trip down .
I would short across them to discharge then replace both .
Ray
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10-07-2018, 06:19 PM
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#8
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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One more vote for start capacitor!
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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10-07-2018, 06:24 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Jan 2008
Posts: 273
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How do you short across them? I’m afraid that may blow me off the roof, lol
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10-07-2018, 06:31 PM
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#10
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Screwdriver with a rubber, or plastic handle.
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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10-08-2018, 11:32 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: Oct 2009
Location: Tucson, AZ
Posts: 6,579
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Our rear AC did something similar. It was the heat pump reversing solenoid. I replaced the solenoid and the unit continued to function.
But, I figured it was time to replace the entire AC. I purchased a new 15,000 btu heat pump from PPL and installed it. It works so well that now I'm thinking about replacing the other two.
Detailed procedures
http://www.irv2.com/forums/f115/repl...ch-405503.html
__________________
97 Monaco Windsor- Sold
07 Monaco Executive McKinley- Sold
04 Monaco Signature Chateau IV
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10-09-2018, 09:30 AM
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#13
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Senior Member
Monaco Owners Club
Join Date: Jan 2008
Posts: 273
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Your right, my PTCR was toasted, capacitor looked ok but will replace both, thanks guys!
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10-09-2018, 09:47 AM
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#14
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Senior Member
Monaco Owners Club
Join Date: May 2013
Location: Burlington, VT
Posts: 563
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We too had smoke coming from our middle ac. Turned out to be the fan motor. Had it replaced and all is well.
Last year or maybe the year before someone with a similar coach had a small fire that originated in the 120ac Junction box that is located from the inside when you drop down the decorative panel below the ac.
__________________
Stuart & Leslie
08 Holiday Ramb Navigator, 45 ft, Cummins ISX 600, 2014 Cherokee Limited, Cashmere. Roadmaster Sterling, SMI Airforceone. Full-timing since May 2014
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