Hi guys last year converted to the 134 gas it worked this year added by jumping the a/c clutch & the gauge shows its full but no cold any ideas ? Thanks
So you jumped the clutch, it engages and spins.........but no cold. And it won't engage on its own??? What's the pressure reading with compressor running and what is the outside temp and humidity when these pressure reading are taken
Thanks for you quick reply i did this last year to charge & wen i put the wire back it worked ok the charging was done with that a/c pro with its gauge as i do not have the 134 gauge set & was baseing the fullness / pressure ( 40 ) on it the gauge has a temp window of the outside temp to fill to yea i know this is crude but have had good success in past
So was that 40 psi on the low side with the compressor jump and running or just sitting there Just sitting there not running it's not uncommon to see static low side pressures 70-100 ps . Then drop to upper 20 -low 40s when running correctly
R134a can be pretty tricky. I've had some of our vehicles go in for AC service due to no cold air (my boss will not spring for a refrigerant recovery system) only to find out they had WAAY more than the recommended 6lbs (dual system, front & rear). One actually had 13.4 pounds in it. The only way to know for sure what is in there is to evacuate the system, verify no leaks and refill with the proper amount. If you get problems after that, do the usual troubleshooting. High side/Low side switches, compressor clutch, power to the clutch, etc.
Check continuity of the low side switch, should be zero ohms with above 40 psi. If that's good check to see if voltage is getting to the switch, one side should have 12v if not check the fuse. If so, you should have 12v at the compressor clutch.
Ok sorry for the delay as roommate uses the car a lot & Thanks to all ok with the compressor running its 40 on that a/c pro gauge which indicates in the green / full zone but no cold & what i discover wen plugging it back in it does not turn on ! this is not an easy car to work on ! i'd rather be working on my 70 skylark conv. or my 63 cutlass conv. so if anyone wants this 89 regal let me know as i know the car since new ! Again thanks to all who weighted in
So I went through a reread your first post It was working last year and cold. But this year you had to add again????? Did you add because pressure was 0 or add because it wasn't cold. It sounds like you have a pressure safety switch if you can jump and it runs. Where did you jump it at If you added because it was empty you also have air in the system if you didn't vacuum the system which will hurt performance. If you just blindly add because the compressor didn't turn on it might be overfill which will hurt performance too
The 88-89 W bodies had terrible ac systems when new with R-12. More than likely, you have a leak. The only way that you can properly diagnose it would be first, use a leak detector and see if you can find a leak with the charge that is in the system, but realistically, the system needs to be evacuated, see if it hols a vacuum, and if it does, recharge the system with the correct amount of R-134. By just adding freon, you don't know if it's over or under charged and there is probably air and moisture in the system. Make sure that you add dye to the system to make it easier to find a leak. Also, don't keep using R-134 that has oil in the can. Too much oil and you'll never get cold air. You really need to put a set of gauges on the system to see what the pressures actually are. In the rust belt, it was common for the evaporators to leak. If the volume of air is low coming out of the defrost, floor , or vents, even in heat mode , more than likely the evaporator is leaking.
