I have a 1995 Chevy C1500 4.3 V6. I seem to be builiding up pressure in the air conditioning system even though the system remains closed. I tried to put a can of freon in and hte pressure in the system did not allow it. I depressed the high side port and for a good while all I got was air. No refrigerant. The clutch at times kicks on and acts as if the system is low on freon by cycling on and off but again, I'm unable to pur refrigerant. Too much pressure. This all started when i noticed the a/c coolling and then all of a sudden getting warm as if the compressor was not even on. I tracked a leak to the high side port shraeder valve and replaced it. Now it won't take any charge at all. Thanks for any help that may be available.
2006-09-30 14:18:33 · 5 answers · asked by mr_n_mr 2 in Cars & Transportation ➔ Maintenance & Repairs
No, you don't need to change compressors or the expansion valve. If the system was working before the freon leak started, all you need to do is short the low pressure switch connector. This engages the compressor clutch which enables the suction side of the compressor to suck in the freon. As a professional, I'd recommend getting the system "evacuated" to remove moisture and air from the system before adding freon. The pressure switch is near or on the large cannister with the bigger hoses going to it. I would rather see you have it done by a shop since this is not a job for a novice
2006-09-30 14:58:59 · answer #1 · answered by MikeyDo 4 · 0⤊ 0⤋
You never said if you evacuated the system after you replaced the valve. If you replaced the valve and did not evacuate the system you have non condensibles in the system and you will not be able to charge it. You might get some in but you wont come close to a full charge and the clutch might engage and disengage rapidly and the system will act like it is over charged.
2006-09-30 18:18:57 · answer #2 · answered by shel_bug66 4 · 0⤊ 0⤋
Are you trying to put it in the thing that looks like a tire valve stem and its located at the top line for the AC unit? Add a bottle of oil for your AC first and then see if the AC isn't cold enough,add freon. The highest place on your compressor line (top side) is where you add freon
2006-09-30 15:12:36 · answer #3 · answered by Anonymous · 0⤊ 0⤋
your orifice is plugged. this is located in different areas on the cooling system. It is on the hi side of the cooling system. look for a connection where there is an indent in the tube. evacuate your system then undo the fitting...the orifice filter is located there.
Use needle nose pliers and gently remove it. If it shows signs of compressor parts in it then you will need to replace your compressor as well. flush the system...replace the orifice using some compressor oil on the "o" ring then recharge the system.
2006-09-30 14:27:50 · answer #4 · answered by Kenneth S 5 · 0⤊ 0⤋
pull a vacuum on the system, recharge it and test your low pressure switch on the Acumulator. Its a hight failure item btw
2006-09-30 16:03:03 · answer #5 · answered by Magikmann 4 · 0⤊ 0⤋