Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Air Conditioner Mystery › Air Conditioner Mystery June 7, 2012 at 11:00 am #443380 John B KobberstadParticipant Sorry I missed that it is a 1992, so – Are you running original system (R 12) or has this already been converted over? Is new pump replacement for original (R 12) or is it an equivalent to be able to run R 134a? Using R12 gages or R 134a gages?