Like the air never worked in my 92 roadmaster but every once in a while u would get a short blast of cool air .So i added a can of r-12a to the system with good results the air was colder than a witchs tit & i figure all is good the compressor is cycling nicely etc. The next day my family had a trip planned and shortly after leaving the air quit blowing cold and the little f beside the air temp starts to flash is this telling me i should reset something or what? the fuses all looked ok ,oh this is also an auto air setup . Tanks Later Bake
Best thing to do would be to put gauges on it and check the pressure. If you don't have gauges, a simple test would be to jump the low pressure switch that plugs into the accumulator(big silver can looking thing) and see if the compressor engages. If it does, you are low on refrigerant and have a leak. If it is a fault with the climate control, a simple battery disconnect will clear the code but if the fault still exists it will happen again. I believe low refrigerant or high refrigerant pressure can set a code in that system but I'm pretty rusty with b-body stuff.
Thanks guys i''ll give it a whirl now if the coolants ok what else could it be ? I realize thats like asking why is the sky blue ? I suppose a gm repair manual would be agood thing . As always thanks 4 any info. Later bake
Your ATC system will disable the compressor if the refrigerant is low. Disconnecting the battery will reset it after you repair the leak and recharge the system. At 17 years, it would be cheap insurance to reseal the whole system (about $10)and replace the accumulator. The seals are on borrowed time (some are likely the source of your leak) and the accumulator is a wear item, much like an oil filter. Be aware that at 17 years, compressor shaft seal leaks are very likely. Does your system have R12(HCFC) or R12a (Hydrocarbon blend) in it? They're two very different refrigerants. If you topped off an R12 system with R12a, the system is now contaminated. If the system has previously been converted to R12a, you're ok.
Ah crap i thought it was a generic r-12 so does this mean i scewed every thing up ? Can a guy just drain the system & then recharge with r- 12a stuff? man i feel stupid bare with me please. later bake
You didn't screw everything up. You just need to get the mixed refrigerants out of the system and recharge it with a single refrigerant. I would highly recommend replacing the seals in all of the line fittings and replacing the accumulator. The accumulator is a wear item, much like your oil filter. Check with the R-12a manufacturer for the proper evacuation and charging procedure. It's different than for "normal" refrigerants like R12.
You didn't screw everything up. You just need to get the mixed refrigerants out of the system and recharge it with a single refrigerant. I would highly recommend replacing the seals in all of the line fittings and replacing the accumulator. The accumulator is a wear item, much like your oil filter. Check with the R-12a manufacturer for the proper evacuation and charging procedure. It's different than for "normal" refrigerants like R12.
