96 HVAC changes every 10 seconds
Thread Starter
Cruising
Joined: Sep 2007
Posts: 14
Likes: 0
From: Atlanta
96 HVAC changes every 10 seconds
The HVAC in my '96 alternates between hot and cold every ten seconds. It is a fairly quick shift. Could the blend door be swinging back and forth? It literally changes every ten seconds. That seems to indicate the programmer. Have read many older posts but haven't found anything similar. Thanks for any suggestions you might have.
Charlie
Atlanta
Charlie
Atlanta
Race Director
Joined: May 2006
Posts: 10,691
Likes: 71
From: Phoenix Arizona
First make sure your compressor isn't cycling. 96's are famous (notorious) for bad controllers, the box on the inner firewall with all the vacuum lines. The little solenoids stick, the tiny vacuum lines break, etc. I haven't really heard of programmers doing that, but I suppose its possible.
Thread Starter
Cruising
Joined: Sep 2007
Posts: 14
Likes: 0
From: Atlanta
Thanks Fred. Composure is not cycling. It is literally switching every 10 to 12 seconds; I timed it while driving. Also noticed that the indicator light above the pushed HVAC button blinks.
I'll try the other items you mentioned.
Thanks,
Charlie
I'll try the other items you mentioned.
Thanks,
Charlie
Melting Slicks
Joined: Jul 2008
Posts: 2,269
Likes: 142
From: Ottawa Ontario
Thread Starter
Cruising
Joined: Sep 2007
Posts: 14
Likes: 0
From: Atlanta
Thanks for the suggestions. I have not paid attention to possible shifts in air flow but will. Did not notice the fan speed but it continues to blow. I have run diagnostics previously but not for this problem. will do so.
Yes, the compressor continues to run. Change in air temperature is almost instantaneous, every 10 to 15 seconds.
Will go with your suggestions.
Thank you.
Charlie
Mine is showing the same symptoms as mentioned in this thread.
https://www.corvetteforum.com/forums...acting-up.html
I'll try the same suggestions offered him.
Yes, the compressor continues to run. Change in air temperature is almost instantaneous, every 10 to 15 seconds.
Will go with your suggestions.
Thank you.
Charlie
Mine is showing the same symptoms as mentioned in this thread.
https://www.corvetteforum.com/forums...acting-up.html
I'll try the same suggestions offered him.
Last edited by charlie44gs; Jun 6, 2017 at 06:12 PM.
