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Old 06-21-2020, 06:15 AM   #15
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Originally Posted by KohtangFred View Post
The tag in the picture says it is 134A gas
The tag picture in Post #8 was not posted by the OP but was posted as an example by someone trying to assist the OP. You can tell by reading the statement just above the picture.
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Old 06-21-2020, 06:18 AM   #16
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It may not need a charge at all. The heater valve may not be closing which would mix heat with the A/C. That happened to us on our previous coach. I cut the heater hose and put in a shut off valve. Look for the heater hose and see if you can locate the shut off valve and see if it is operational.
I've had that problem before and simply clamped the heater hose off with long nose vise grips to confirm the issue.
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Old 06-21-2020, 07:17 AM   #17
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Production of R22 was starting to phase out in January of 2004. It is not like R22 in your system.
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Old 06-21-2020, 09:18 AM   #18
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All the refrigerant leaked out what's to stop the refill from leaking right back out too?

Nothing, but it typically takes months rather than hours, so in the meantime you have a/c. For several years I spent $300 every 12-18 months getting leaky o-rings diagnosed and repaired. I finally gave up and just put a $5 can of R134a in about once a year. Happy camper again!
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Old 06-21-2020, 01:39 PM   #19
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Your dash air should have 134a which is available at Walmart and most parts stores. If a vacuum hose was off you should be ok adding 134a. If it was a refrigerant line you will need to repair and pull a vacuum the system.
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Old 06-21-2020, 07:52 PM   #20
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There should be a refrigerant tag somewhere on the compressor or the evaporator housing. You've seen one before, every car and pickup with air conditioning has one, virtually all are on the fan shroud. This tag identifies the refrigerant and capacity.
I recommend having a commercial auto AC shop do the work, sure it costs more at first; but if you mess-up replacing components will far outweigh what a commercial shop might charge -BEFORE you worked on it.
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Old 06-22-2020, 12:57 AM   #21
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It's easy to add refrigerant to an auto system. Most auto parts sell an amateur kit, can, charging hose and gage. Hook up to the low pressure side, supposedly fool proof fittings.. When I bought the motorhome it had a weak dash air. I had it in for other repairs under a service plan and had them charge the system. I was way overcharged for what they did but that refrigerant charge lasted 3 years. Last summer it was getting weak so I got a kit and added a pound. No not scientific and not 100% correct but the dash air blew cold..

Adding, cost was $20-30
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Old 06-22-2020, 07:26 AM   #22
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until you get it repaired, run the generator and the house air
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