Hello all, my 93 Z is having a AC issue, I know it's fully charged, but i cant get the compresser to kick on, i jumped the low press. switch and still nothing, and i noticed the electric fans do no kick on either. IS there a way to jump the dash AC control to see if thats the problem??

 

have u checked the fuses both by the door and under the hood? also see if u have some trouble codes stored in the computer.

 

I did check the fuses, and they were all perfect, along with all the relays related to it. I did leave it on "AC" and started the car and it kicked on, so i know the compresser works and so on, but then it kicks off randomly and wont kick back on?? even when i go from defrost back to AC, ... but nothin....

 

tell me a lttle more. does the ac work? heater work? are u overheating? let me know and ill look it up and see what the book says. so the ses light has not been coming on ? have u checked for stored trouble codes?

 

Well at first it was warm air, I checked to see how much was in, and it was a little low, so then i tried to fill it, and the compresser wouldn't kick on. now its got a full charge thinking that would help but still nothing. I jumped the low pressure switch to see if maybe thats the prob, but still nothing. The heater and all the controls seem to work good, i tried jumping the ac controls too, but still nothng there either. The ses light has come on once since ive ownd it, but i cant check it cause its OBD1 and my scanner is for OBD2, i assume its a O2 sensor being that its never on for more than 5 mins, and only does it while im on the highway for long periods of time. ( i also didnt try using the ac either of the times it came on) so from here im stuck. cause last nite i turned the car on, with the AC in the on position, and everything kicked on... then shut off again randomly??? possibly a ECM problem??? something I hope that its not, cause thats $$$$$

 

ok well everything so far in the book uses a acr4 unit to diagnos the ac. i would recomend taking to a dealer shop and have the ac serviced. theres some sensors in the system that could be doing it. i think u have checked some. theres a ac presure sensor, a ac temp sensor, compressor relay, low presure cut off switch. make sure u dont have any vacumm leaks, the controls work by vacumm. compressor relay is under hood in the electrical center or the black box on the driver side.

 

well I suppose ill have to take it to someone, I now noticed that the problem has outreached to the cooling fans. at first i noticed that they didnt kick on with the AC, now i see that they dont kick on at all. Now my cars getting HOT! like 235/240*F, and the fans airn't kicking on. I jumped the OBD plug and got the fans to kick on that way, so i know they work, but dont go on when they are supoose to. Im wondering if these are all connected somehow