chicagoslick
New Member
- Joined
- Jul 25, 2014
Has anyone encountered issues switiching from R12 to 134A? I had a low charge for 12 and I converted to 134A over the weekend and while the ac does blow cold it is not what I was expecting as the old R12 ran very cold. Additionally, the pressure switch at the accumulator does not seem to cycle the compressor on consistently. When I switched over I pulled system into a vaccum, checked for leaks, and added gas at low pressure port. The system took ~40oz, and the temp at idle in the car at the vents dropped ~25 degrees on an 80 degree day. Low pressure gage read ~40psi. The low pressure line never frosted but sweated with compresser running. I may add some more 134A until i see start of frost on low pressure line. Max pressure on low side should not exceed 60psi and I am well below that.
Any thoughts?
I recall years ago that the condensors on R12 systems were on the small side for 134A conversions, but not sure if that applies in this case...I think this more resides around the low pressure switch, but could be wrong...
thanks in advance for all responses,
87 Buick GN Stock
Any thoughts?
I recall years ago that the condensors on R12 systems were on the small side for 134A conversions, but not sure if that applies in this case...I think this more resides around the low pressure switch, but could be wrong...
thanks in advance for all responses,
87 Buick GN Stock