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Date:         Wed, 2 May 2001 08:32:32 -0600
Reply-To:     Randy Herd <randyherd@hotmail.com>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Randy Herd <randyherd@hotmail.com>
Subject:      Re: A/C R-12 to R-134A
Content-Type: text/plain; format=flowed

Alan,

I changed mine over to Freeze-12 last spring. It is composed of 80% 134A and 20% something else. Straight 134A operates under a lot higher pressure than R12. Freeze-12 is in between. Have the AC tech pull a good vac, add a little ester oil (for the 134) and in theory add 80% of what the R12 charge would be. Using gages for pressure is best. I did not change any O rings, receiver/dryer, or anything else. My AC cools just as good as it did with the R12 (cold air).

The only difference I have noticed is that I have to keep the Ac switch thermostat turned up a little higher than with the R12. Because of the pressure differences the compressor cycles off and on a little more often.

Ken Wilford convinced me to use Freeze-12 and knows a lot more about it than I do.

Randy Herd 86 GL Weekender 68 Kombi 98 Jeep Cherokee

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