jrzvette

My 93 coupe's air conditioning system no longer blows cold air. The system is charged and there are no apparent leaks. Also, there is no heat either. Again, no leaks. The fan operates but only blows air, neither hot or cold. The car has RPO C68 Electronic Air Conditioning Control.

Any suggestions?

thanks

antfarmer2

It will self test see on youtube.

Goldcylon

Yes watch this video which is the best I have seen to date which takes you into the C68 diagnostic code procedure and has a portion that shows in the Factory Service Manual (FSM) what the codes mean. I suggest this would be a good place to start. GC

jrzvette

Thanks. I'll try it over the weekend.

chatham

if you don't find the problem by the above video, sometimes if you just disconnect the battery and reconnect it will reset the system.

jrzvette

Just did the check as in the video; got a code 09, Low Refrigerant Detected. Still doesn't explain why there's no heat but since I don't use the car too much in the winter that's not a real concern. Now all I have to do is hope to find an A/C shop that can refill an R-12 system.

antfarmer2

It might be might be a plugged heater core. I would flush it and look for leaks or bypass if not needed.

DC 155

Any idea if the procedures in the video would apply to a 1986 Corvette?

Cliff Harris

That diagnostic procedure applies to 1990 and later.

For earlier cars, see this:

https://www.corvetteforum.com/forums...stic-mode.html