How do I fix a high pressurized A/C system on my 2000 Chevrolet S-10?

I had a mechanic replace my exhaust headers a while ago on a 2.2 L 4-Cyl. Engine and he had to remove the A/C unit to get to it. Now when I tried to use my A/C system it is not cooling down as it did before and when I tried to add more oil/frion mix into the system, the gauge was telling me that there is well over 100 psi of pressure inside and that I obviously shouldn't add any more. During the process I had the system on Max A/C and the fan on high. In the middle vent there were small bits of sponge being blown through it. Through my random search of answers I think it might be the sensor that controls the compressor and tells it when to turn on/off. Any suggestions or ideas would help....

How do I fix a high pressurized A/C system on my 2000 Chevrolet S-10?
OKAY FIRST PUT THE GAUGES BACK ON AND READ BOTH THE HIGH AND LOW SIDE PRESSURES.





LOW SIDE 30 TO 40 PSI AND HIGH SIDE 225 TO 250 PSI.





CHEAPEST WAY IS TO JUST REPLACE THE ACCUMULATOR AND THE EXPANSION TUBE AND EVACUATE AND RECHARGE AND ADD THE CORRECT AMOUNT OF FREON AND OIL.








TRY THIS GUY, I HAVE PURCHASED MANY ITEMS FROM HIM THROUGHOUT THE YEARS AND SOMETIMES HE HAS A LOT OF OLDER PARTS AND ODDBALL PARTS, ALSO HAS VERY GOOD PRICING AS WELL AND IS A VERY FAST SHIPPER.





WWW.TEXASERICK.COM
Reply:I am guessing that you are seeing 100 PSI on the low side...and the compressor is running??? It is WAY overcharged!! or the expansion oraface is plugged. Either way, it will not cool. You should see around 30-40 psi at 90 degrees ambient on the low side and around 250 psi on the high side. Hook up to the high side and see what you have.


Good LUck
Reply:It may be the sensor or it may be the compressor itself, check to see if the clutch on the compressor is engaging when you turn the AC on, if not the compressor may be bad.
Reply:First of all, find out if your "mechanic' opened the A/C system. If he did, the whole thing will have to be evacuated and recharged. He may have just rechardged the system without evacuating it.There can't be any dirt or moisture in the system.