I have a very similar problem in my 2000 Chevy Blazer 2x4. My A/C works intermittently, but most of the time is does not work at all. I went through a period where it worked all the time and now it is not working all the time. I had the freon level checked and it is fine. A faulty pressure sensor/switch seems likely cause as was mentioned in the response. Anyone have any ideas of how I can avoid the shop ripping me off?
Disconnect your high pressure switch when the compressor is not engaging and stick a paper clip in the wiring harness.. thus jumping both sides of the wires.. If the compressor engages then you know its a faulty pressure swicth.
You can buy the a/c pressure switch and replace it your self. It's located on the accumulator (air dryer) un-clip the wire harness and remove the switch and be ready with the new switch to replace, it's like replacing a oil sensor. Your not going to loose that much R134a, just have the new switch ready to place in the accumulator. Once placed if you have the gauges for the a/c, the low side should be 30psi to 50psi and the high side should be 150psi to 200psi with the a/c on the highest level. Any other readings will give you poor a/c performance. Good luck and keep me posted.
have 98 s10 blazer 4.3. when trying to start in morning cranks good wont start can put jumper cables...
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have 98 s10 blazer 4.3. when trying to start in morning cranks good wont start can put jumper cables on and it will take right off battery not dead or weak. after get started it will start rest day ok
ok i have a 98 blazer v6 4.3l 4x4 and my 4 wd wont work the lites on the push button turn on you can...
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ok i have a 98 blazer v6 4.3l 4x4 and my 4 wd wont work the lites on the push button turn on you can feal it kick into 4H and 4L but the it wont kick in when i first bought it i had the the transfer case replaced and some vacuum switch on top of the transfer case replaced it worked the last time i used it was last july.. if any one might be able to help me out and have an idea of what it might be plz let me know