ac blinking lights
Thread Starter
Racer
Joined: Jun 2005
Posts: 347
Likes: 5
From: VA
ac blinking lights
The lights on my heater control unit are blinking and it only blows hot air, anyone have any ideas? I just had the alternator replaced right before this happened but i dont think that would make a difference
1991 Auto
1991 Auto
Burning Brakes
Joined: Sep 1999
Posts: 786
Likes: 31
Cruise-In II Veteran
The Corvette Air Condition Controller has a failure diagnosis system built into it. When the Control Head starts flashing it means that a failure has been detected and a code set.
For a "How To" on retrieving the codes go to:
http://www.idavette.net/tech/c4diag.htm
Most of the time the problem is low refrigerant.
For a "How To" on retrieving the codes go to:
http://www.idavette.net/tech/c4diag.htm
Most of the time the problem is low refrigerant.
Last edited by Wildride; Sep 4, 2008 at 01:56 PM.
Racer
Joined: Aug 2005
Posts: 252
Likes: 2
From: lancaster pa
The lights flashing on the control head are for codes stored in your'e hvac system.Mine did that when it was low on freon.Hopefully they didn't bump or break a line or something with freon in it when they replaced your'e alt.You need to get the codes out of the head.
Thread Starter
Racer
Joined: Jun 2005
Posts: 347
Likes: 5
From: VA
i got a code 9 low freon i guess i will have it recharged but i know there is probably a leak somewhere, also i noticed that sitting still the car heats up very quickly with the ac on, something that usually only happens when the ac is off
Last edited by Mgunn; Sep 4, 2008 at 12:45 PM.
Racer
Joined: Aug 2005
Posts: 252
Likes: 2
From: lancaster pa
Since the a/c isn't working properly are your'e cooling fans coming on like they normally do when you turn on the a/c? When I turn on my a/c the fans come on instantly.
Thread Starter
Racer
Joined: Jun 2005
Posts: 347
Likes: 5
From: VA
no, the lights dont start blinking until the system is on for a few minutes and then i can tell the cooling fan is not working like it should. I found where the freon is leaking and let someone look at it. Will be taking it to his shop in the next couple of weeks. He is a ford mechanic by trade but he seems to know what he is doing lol
