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08-28-2015, 10:23 AM
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#1
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2 Rivet Member
Currently Looking...
Modesto
, California
Join Date: Jun 2014
Posts: 28
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Air Conditioner
The a/c in our motorhome does not work. It was R-12 and we now need R-134. I found a new air compressor at O'Reilly's. Does anyone know if I used the correct info. I told them I have a 1979 Airstream Excella Motorhome built on a Chevy P-30 chassis with a 454 engine. Do I need any other info? I don't want to order it and then get stuck paying a restocking fee because it's not the correct one.
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08-28-2015, 10:26 AM
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#2
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Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
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I'm not an expert but I believe there's more to the changeover than just the compressor. I think the receiver/dryer also needs to be changed, and probably some other components as well.
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Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
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08-28-2015, 10:43 AM
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#3
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Rivet Master
2007 22' International CCD
Corona
, California
Join Date: Jul 2013
Posts: 9,180
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Usually also requires an orifice change
Sent from my pocket Internet using Airstream Forums
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Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.
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09-03-2015, 12:24 PM
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#4
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Rivet Master
1978 25' Tradewind
Metro Phoenix
, Arizona
Join Date: Jun 2003
Posts: 1,524
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Might be less expensive to scrounge some R-12 for cash off Craigslist.
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"Between what matters and what seems to matter, how should the world we know judge wisely?" - E.C. Bentley, Trent's Last Case
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09-03-2015, 01:03 PM
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#5
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,351
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I changed the compressor/drier on my 1987 Mercedes and just put R134A in with no other modifications. It had been cooling for 7 years.
With that said, later I found another refridgerant called Envirosafe. It is marketed as a R12 and R134A replacement. I currently have it in two vehicles. It works very well.
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09-03-2015, 02:17 PM
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#6
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Rivet Master
1973 27' Overlander
Loganville
, Georgia
Join Date: Nov 2007
Posts: 1,741
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Are you sure it is the compressor? Did you check the compressor start up capacitor? I just fixed my air conditioner and started with the capacitors. They were both fine. My air conditioner was not working and I discovered it was the motor. If the motor works and you click from fan to air conditioner and nothing happens I would check the capacitor first. when you take off the cover you will see a little door closed by a sheet metal screw. You will see two capacitors side by side. The one that has a red, white and yellow wire is your Compressor capacitor. Get the information off of it and go to a AC company and have them check it. They will sell you one for under 10 dollars
The air won't work unless you are on a 30 amp outlet
__________________
Brian & Adrienne
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09-03-2015, 03:08 PM
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#7
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,351
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I believe the OP is talking about his automobile AC.
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