Heyblue
Well-known member
So a little background. A/C was not working, the compressor clutch was not engaging. Using the Service Manual, including the addendum electrical one, concluded there was probable not enough Freon. Bought a kit to convert from R-12 to R134. In the process realized there was virtually no R-12, hence not enough pressure to closed the cycling and high pressure switches. Added R-134 using with gauge that came with one of the cans. Cooling started working.
So what is the problem? When the car is started cold with average ambient temperature the radiator fan comes on with out the A/C unit turned on. After warm up they seem to start cycling as you would expect, at least while siting in the driveway. There is only one indication that there is a pressure switch that causes the fan to come on when the A/C unit is on. I found it with no help with the manuals. It is on the compressor, it is a single wire. It does not seem like it is replaceable. I disconnect and the fans quit coming on with cold engine.
Question 1. Can it be replaced?
Question 2. What should the static pressure be in the A/C lines?
Thanks in advance
So what is the problem? When the car is started cold with average ambient temperature the radiator fan comes on with out the A/C unit turned on. After warm up they seem to start cycling as you would expect, at least while siting in the driveway. There is only one indication that there is a pressure switch that causes the fan to come on when the A/C unit is on. I found it with no help with the manuals. It is on the compressor, it is a single wire. It does not seem like it is replaceable. I disconnect and the fans quit coming on with cold engine.
Question 1. Can it be replaced?
Question 2. What should the static pressure be in the A/C lines?
Thanks in advance