Another A/C ?

[TVZ71]

I have a 95 Sierra Z71. Last summer the A/C was working fine, I just tried it the other day and I get no cold air. I bought a recharge kit and hooked it up, the pressure was way high. What should I do next? What kind of ballpark figure can I expect to pay for service?

[2000CAYukon]

Did you add r134a before you noticed the pressure was too high? What is the pressure you are seeing?

Is the compressor cycling on and off?

//2000CAYukon

[TVZ71]

Originally Posted by 2000CAYukon

Did you add r134a before you noticed the pressure was too high? What is the pressure you are seeing?

Is the compressor cycling on and off?

//2000CAYukon

It was high, I didn't add any. I think that the clutch is not engaging, Thanks.

[2000CAYukon]

Originally Posted by TVZ71

It was high, I didn't add any. I think that the clutch is not engaging, Thanks.

First thing to check is the pressure cycling switch on the accumulator. If you remove the electrical connector to the pressure switch and insert a jumper wire, see if the compressor kicks on. If so, you found your problem. The switch can be replaced without loosing any freon.

//2000CAYukon

[TVZ71]

Originally Posted by 2000CAYukon

First thing to check is the pressure cycling switch on the accumulator. If you remove the electrical connector to the pressure switch and insert a jumper wire, see if the compressor kicks on. If so, you found your problem. The switch can be replaced without loosing any freon.

//2000CAYukon

Without sounding stupid............. Where is the pressure cycling switch located? Thank you for your input, unfortunatley it is unseasonably hot and humid here in the magical mitten right now.

[jmat1980]

I have the same prob with an 03 blazer. I know where the elec. connector to the pressure switch is, but what do you mean by a jumber wire?

[2000CAYukon]

Originally Posted by TVZ71

Without sounding stupid............. Where is the pressure cycling switch located? Thank you for your input, unfortunatley it is unseasonably hot and humid here in the magical mitten right now.

The cycling switch is on the accumulator (a silver cylinder near the passenger side firewall).

//2000CAYukon

[2000CAYukon]

Originally Posted by jmat1980

I have the same prob with an 03 blazer. I know where the elec. connector to the pressure switch is, but what do you mean by a jumber wire?

The pressure cycling switch closes the circuit when there is enough pressure in the system (like turning a light switch on) and it opens the circuit when the pressure is too low (like turning a light switch off).

To test the switch, you need to complete the circuit. A jumper wire is a short piece of wire that you make to complete the circuit.

//2000CAYukon