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Re: Convert a 90 740 volvo BACK to R12
Posted to HVAC Forum on 4/20/2007 5 Replies

Ester Oil is what Volvo recommends for THIER AC retrofits from r12 to 134a.

I personally have used alot of Ester Oil in retrofits and never had a single problem. I have even had a few customers have me also switch them back to R12. No problems there either. ... Login to read more.

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