Have a 1994 full size blazer and my air was work but not blowing tht cold so i added a can of 134 and it was really cold,but after a few mins.it stop and the a/c light on the inside started blinking

SOURCE: 2001 chevy blazer ac problems

freon level is low. add r134 refrigerant and your problem will be solved.

Harvey N Tawatao

• 3854 Answers
• Posted on Jun 10, 2009

SOURCE: Air Conditioner works intermittently

It could be your low pressure cycle switch is going bad. Check the connection to the switch and it's is located on the A/C Accumulator. The other thing to check is the A/C relay and that is located in the glove box. There is a panel in the glove box that say's relay, there is three relays in there and one of the out side relay's out of the three is the A/C. can not remember which one it is. The middle relay is the fuel pump and the other one is the third break light. Switch the two out side relays and see if your A/C get's better. the other thing too is if the R134a is just a little low, and needs to be topped off. Good luck and hope this helps. if your going to try to recharge the A/C system your self, keep in mind not to over charge.

SOURCE: on my 1995 chevy blazer s-10 my face vents are not blowing air

Your heater valve is stuck open, also in a pinch you can crimp off your hose to the heater coil at fire wall. Try to find the heater valve vacumb hose under the hood see if it is bad and fixit. or some models have a cable to the valve could be broken. 

SOURCE: 96 Blazer A/C WILL NOT BLOW ANY AIR HOT OR COLD

BEFORE YOU DO ANY HARD WORK TURN ON YOUR A/C AND BLOWER AND TAP THE BACK OF THE BLOWER MOTOR WITH A SMALL HAMMER IN A COMPLETE CIRCLE. SOUNDS LIKE YOU JUST HAVE SOME STICKING BRUSHES IN THE BLOWER MOTOR.
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SOURCE: ac blows hot air,compressor does

Have you checked your condensor out ? could be clogged...or your accumulater/Reciever Drier being faulty..