Correct, the compressor would cycle, ~2 seconds on, then shut off for 7-8 seconds before coming back on for another 2 seconds.
I charged the system with ~30oz of R134 until the pressure gauge on the low pressure port read 40lbs. How to measure static and suction pressure is something, quite frankly, I don't understand.. Just trying to diagnose and get my AC working without taking it to a shop that's going to take a look and tell me I need this and that and my bill will be $1000...
This is for my 2001 Bravada..
Quote:
Originally Posted by brcidd
You answered your own question- you stated the system cycled on and off rapidly- with little or no cooling I'll assume- this means your original cycling switch is functional and doing its job and working as designed. You state the pressures are good- it is well known that you cannot judge system refrigerant amount by pressures- the ONLY way is to extract and weigh the refrigerant to know if your system is charged to specification.
Why you replaced the switch is beyond me....you need to assure your refrigerant charge amount is correct first- then diagnose from there. Chances are real good you are still undercharged- do you have a gage set on it to read static pressure? What is the suction pressure when you have it jumped out- If less than 20 psi, you can damage the thrust bearings in your compressor.
Also you failed to mention make and model of your vehicle- which helps in the diagnosis...
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