i have a 92 gmc truck. A/C stopped working and a/c light also flashes on dash!!!?

Answer 1

Check out the thread below over @ FSC.com To see what they are talkin about w/ this guys 91 model 1/2 ton ext cab.

I had this same problem w/ my now x 91 Silverado Z71. Where the A/C light flashed and it was just low on feron. Of course, it got to the point where I had to re-charge the system every yr. due a leak somewhere in the system. We never bother trying to locate the leak(thro, we did add the colored leak additive ea. time but, never seen anything.). Just b-cuz we felt it was simpler and/or cheaper just to re-charge(service) it yearly(down here in Southern GA).

Good luck!

Answer 2

The control unit in the dash has a problem with the low pressure alert but it is a problem in most 91-93 models. The solution is to take your control unit out of the dash and take out the #1 slot wire which is the dark green wire. Do not cut but pull the whole connecter from that one wire out with pliers or something that will use force. Tape it well so it will not short. Put it all back in the dash and you are good to go. You will still have your low pressure switch in the drier to stop the compressor clutch from engaging when low on Freon but you will eliminate the fault in the control unit.

Answer 3

It has stored a code and the light is flashing to tell you that it has diagnosed a problem. Most times you have a leak in the refrigerant and the sensor has detected that. It then locks out power to the compressor so no damage occurs. Find the leak and repair. Then get the system evacuated and charged. You might have to then get the code cleared.

Answer 4

What hs got here approximately is something that save away from has sent me interior the form of Tech service announcements provided that March of 2010. you have extra synthetic R134 to a equipment that consists of standard R134 A. you have additionally Over crammed the equipment. you have a leak interior the A/C at a connection element. look for the "green" dye interior the connections from the condenser all a thank you to the compressor and the Dryer. in case you do not wonderful a defined leak then you certainly've burst the Condenser or the Dryer. i'm hoping to your sake it is the Condenser. it is common to replace whilst in comparison with the Dryer. some effectual tricks to searching for the leak. a million. Use a extremely violet mild. 2. in case you have not got one you will get a flash mild and a BLUE lenses to do a similar element. 3. Shine the mild on all of the connections and hoses and the condenser. in case you detect the leak you will understand what has to get replaced. 4. when you do your "verify paintings", you will ought to empty and evacuate the equipment. 5. then you certainly ought to get rid of the A/C compressor and sparkling it using " PAG" style oil. Use a air blower to get out the previous oil and residue from the compressor. Then use the "PAG" oil to bathe and fill up the compressor with NEW oil. do not use synthetic R134 to fill up your equipment. this might purely recreate a similar situation. 6. you will ought to replace the "Orifice tube" . This tube is a filter out it is placed interior the Low stress line close to the Dryer. the main considerable factors of the A/C equipment are as follows. A. Compressor B. Dryer C. Condensor D. Evaporator E. intense and occasional stress Switches F. intense and occasional stress lines (hoses) G. Orifice Tube (filter out) H. Freon I. Pag style Oil ultimately. make certain you do not over fill th equipment. Pull a Vacuum to 30 tiers decrease than 0 on a A/C Guage. whilst your systm is on the mark, enable it set for half-hour to learn for leaks. If the equipment leaks you need to look for them. If not, then you certainly're waiting to fill up the equipment. whilst filling the equipment, you need to have cans of freon waiting and turn the cans the different way as much as get the fluid into the Low stress element. consistently FILL FROM THE LOW stress LINE. Watch the pressures on the guage. you opt for for 40 P.S.I on the LOW element. you opt for for 220 to 250 P.S.I. on thehigh element. e mail me in case you need to for greater coaching. i'm going to be happy to communicate with you over the telephone if mandatory