#1  
Old 09-18-2020, 01:08 PM
abefromen's Avatar
abefromen abefromen is offline
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Join Date: Jul 2007
Location: a van down by the river
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Default 1977 CCOT system rechage

So to make a long story short, after rebuilding the system in my '77 (new comp. accumulator, flushed cond and evap) there was a problem with the gauge set I used and a proper evacuation was never done. Didn't realize this until the system was almost fully recharged with expensive R12 and the evaporator kept freezing up and the compressor short cycling.

The moisture was obviously never removed before recharging.

Do I need to find a shop with the proper R12 all-in-one machine to recover and reuse the R12? My local shop tells me he "thinks" he can do it with his 134A machine and refill it with his R12 gauges whatever that all means. Sounds like he doesn't know what he's talking about.

Any advice is appreciated.

  #2  
Old 10-02-2020, 06:35 PM
Goatracer1 Goatracer1 is offline
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Default

R-12 and R-134a equipment has differences. If the guy removes the R-12 that you have in there now he is also removing the air and moisture that is also in there and storing it in his tank. Depending on how good his system is he may be able to filter out the moisture but NOT the air. Also some amount of oil will be vacuumed out also going into his tank. There will be oil from R-134a systems in there also and the 2 are not compatible. If I were he I would not want my equipment cross contaminated. And, I would not want to take the chance my AC system would be contaminated.

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