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Old 05-20-2012, 01:43 PM   #1
Vintage RV Owners Club
Join Date: Apr 2012
Posts: 47
1978 Dodge Sportsman AC


Seems like a lot of people know this stuff here and since I'm new to all this RV and working to bring an old man to shape and functional please do excuse my beginner questions.

This question is regarding the AC unit on the roof, I've noticed today running for ten minutes in 90s that the air coming from it is little cool, if cool at all.

That said, can I recharge it like the AC in a car? I'm sure it's still the original AC. Should I buy a new one? I can hear the compressor turn on but that's it and well the fan blows too.

Any suggestions on first steps in figuring this out or recharging would be greatly appreciate it. Thank you in advance. I can take a picture if that helps someone.

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Old 05-22-2012, 12:40 AM   #2
Junior Member
Join Date: Oct 2011
Posts: 25

Welcome. Any ac can be fixed. Yours if it is original has paid for itself. A lot of times just a good cleaning will help. Especially the condenser coils. Have an ac man check oil to gas ratio. If just start adding freon you could kill the compressor. It may be hard to find the feron. That old of model took r22 which was taken off the market years ago. The new stuff will not mix with the old. A new unit will cost about 500 dollars. Good luck

2001 Jayco Eagle 283 with v10 & a dolly
oet2, The Barton's

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Old 05-23-2012, 08:11 PM   #3
Senior Member
Mid Atlantic Campers
Join Date: Apr 2010
Location: Charleston, WV
Posts: 224
The unit can be serviced and recharged. However you'll need to find someone who knows what they are doing because there aren't any service ports to charge it from like on a car. I'd go with the cleaning first and try that, if not, it most likely will need a charge (or worse). It should take R22, which is still manufactured and readily available, to anyone qualified to purchase it.
Don't get to deep into fixing it though, it may work out better to just replace the unit instead of trying to fixing it if it's old.
Bottom line: Have a professional look at it and go from there.
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