2nd Gen Non-Engine/Transmission A/C Problem

[Tinman]

A/C suddenly quit the other day. I first tired to add refrigerent but I wouldn't take any and pressure on the low circuit was about 100psi. I then noticed the compressor wasn't turning on. I unplugged the cycle switch on the accumulator and put in a jumper wire and the compressor cut on and it blew cold air. I'm assuming that means the cycle switch in bad. Can I just replace it? Would that be on the low pressure system or high? I don't have too much expericence with A/C systems, but know enough not to mess with the high pressure side if you don't know what you are doing. Should I take it to the ******* or can I just replace that switch? Thanks in advance.

 

[nps]

Try to add some refrigerant with the compressor jumpered and running. I'd suspect this before the switch going bad.

 

[JFaughn]

Put a multimeter on the switch wires and jumper the clutch and watch the gauge . if no reaction or the sw. makes contact at hte wrong pressure , replace .
But that low side seems too high .

 

[B.G. Smith]

A/C suddenly quit the other day. I first tired to add refrigerent but I wouldn't take any and pressure on the low circuit was about 100psi. I then noticed the compressor wasn't turning on. I unplugged the cycle switch on the accumulator and put in a jumper wire and the compressor cut on and it blew cold air. I'm assuming that means the cycle switch in bad. Can I just replace it? Would that be on the low pressure system or high? I don't have too much expericence with A/C systems, but know enough not to mess with the high pressure side if you don't know what you are doing. Should I take it to the ******* or can I just replace that switch? Thanks in advance.

The switch is in the low pressure side of the system, it should be closed (have continuity) when the pressure is above 43psi and be open when pressure is below 25psi. It is screwed into a schrader type fitting and can be changed without evacuating the system. bg