i have a problem with my a/c i have 97 blazer and when i bought 2 months ago a/c was working i checked it be for i bought it was working now nothing compressor is running clutch is going but not blown cold a/c lines are warm charged the a/c lift sit for 10 mins on full blast and still hot air a/c line still hot. what could be the problem

 

The A/C liquid line at the bottom of the evaporator should be hot. The outlet fitting at the top of the evaporator, the entire accumulator, and the line going back to the compressor, should all be cold. At 1500 engine RPM, what are the pressures at the high and low side service ports? The clutch should be cycling. Low side should cycle between 22psi and 42psi. High side pressure will vary depending on ambient temperature, humidity, and sun load. "Ball park" is 120psi to ~250psi.

 

high is at 37 and it's in blue stating that filled but what i noticed that when i charging it clutch was cycling but now it's not engaging check fuses and relay they good what the hell going on.

 

plz somebody tell where can i found dam relay for a/c there only three under the hood on fire wall but cant find which one is it

 

Low side pressure must be at least 42psi before the clutch will engage. When the clutch engages, low side pressure will drop. When it reaches ~22psi the clutch will disengage, pressure will rise, and the cycle repeats. Sounds like you're low on refrigerant. Drain and evacuate the system for at least 1 hour, then recharge with the proper amount of refrigerant.

 

ok thanks i'll just pro check it out thanks again i rather spend the money on it the right way then mickey mouse job lol

 

Good idea, will save money in the long. Buy time I got done monkeying with mine last year to get it right almost had to take it to the guy anyway. They just love when you bring them a box oh parts.

 

I agree. Diagnosing and repairing A/C requires a substantial amount of money for the (necessary) proper tools.