Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › help with refilling ac system. › Reply To: help with refilling ac system. June 17, 2020 at 3:21 pm #957598 Dave TidmanParticipant One thing to make sure is that your compressor can handle the increased workload on 134a. See this for details: Convert Auto R12 system to R134a