| Roof A/C not working. [message #94071] |
Sat, 31 July 2010 12:17  |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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My roof A/C quit working. I am fairly sure it worked a few months ago, but it hasn't been hot enough to worry about... I KNOW it worked last year... it was working when the Onan died.
It is:
Coleman Mach - model number 8333-871 - R-22 Refrigerant
The fan runs. I checked the start and run caps and they check out like good caps. I jumped the thermostat and the compressor runs (vibrates) but none of the tubes change temperature.
Is there anything else to check before I pull the unit?
I have an almost new 15k low profile Carrier Unit on my other coach. (Not being used, but not yet a parts coach) That I could transfer to this one but would require removing the pod or relocating the MaxAir unit to the center hole and installing the low profile unit on the front hole... plus the rewiring to make it work.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: Roof A/C not working. [message #94129 is a reply to message #94071] |
Sat, 31 July 2010 18:31  |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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If the compressor is vibrating and the lines don't have different temperatures I would suspect the compressor has a broken piston or rod.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: Roof A/C not working. [message #94146 is a reply to message #94129] |
Sat, 31 July 2010 20:41 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| roy1 wrote on Sat, 31 July 2010 16:31 |
If the compressor is vibrating and the lines don't have different temperatures I would suspect the compressor has a broken piston or rod. ...
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It isn't vibrating any more than I would expect from a good unit --- If anything, has a little less vibration than expected.
I do not think it matters but, the bottom frame on the AC is bent and the compressor isn't setting straight up and down. It looks like it is the original AC that hasn’t been removed from the time it was installed. (Coachman… high quality components installed by poor quality workmanship.) If so, it has worked that way for over 30 years.
I think it may be time for a new AC. Family RV on eBay has some nice Carrier units.
Thanks for your input.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: Roof A/C not working. [message #94175 is a reply to message #94071] |
Sun, 01 August 2010 10:14 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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If the compressor is running and there is no temp differential the first armchair diagnosis is loss of charge.
John Lebetski
Woodstock, IL
77 Eleganza II
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