A/C problem...

Sounds very much like you are low on 134a. It will automatically cut the compressor clutch off when it senses low refrigerant pressure, thus the cold/not cold condition. Buy a can of R134a and the hose to load it with. Use 1/2 of the can and see if that triggers the compressor to remain on. If it does, the that was the problem. Let it be with 1/2 the can, then if/when it cuts out again install the rest. They sell the install hoses with a built in pressure gauge if you want to be precise.

most likely the low side cycling switch is bad. could also be a CCRM fault or a high side switch,.

svttech76 said:

most likely the low side cycling switch is bad. could also be a CCRM fault or a high side switch,.

Click to expand...

Yep what he said. I had the same problem with my 97 and was told on another A/C thread here that the low side cycling switch was bad. The part only cost like 12 bucks at ORalley's or Autozone. Give it a try. I tried to attach a pic of 4point6's underhood. Hopefully he doesn't mind, but anyway I circled in red the switch that I replace that gave me instant cold A/C...