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Help with 92 AC malfunction

AlHale

Member
Joined
Jul 19, 2001
Messages
18
Location
Rockwall, TX
Corvette
1994 LPE
1992 Coupe with electronic Climate control.

The problem seems to happen as soon as you start the car and gets better the longer the car runs. However it may just decide to go into this behavior anytime on its own. The display intermittently changes from the outside temp to 00 and randomly turns on “Auto”. At this point none of the buttons seem to work. Or it takes 10-30 seconds for a button to take effect. Other times, it functions normally. Any Ideas?

I would appreciate any and all ideas.

Thanks,
Al Hale
 

JT ZR-Won

Well-known member
Joined
Dec 6, 2000
Messages
1,273
Location
Bradenton, FL
Corvette
'90 ZR-1 #365 (SOLD...but Dad's got it now)
Hi Al and welcome to the CAC.......
That's a good question. My Dad is having sort of the same problem with his '93. He was telling me that it kind of works when it wants to & then some of the time it works fine. Unfortunately, I've never delt with this problem before. It sounds like somethimg is shorting out though......

Jay
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
Hi there,
Most likely, you are looking at a HVAC programmer, which controls all your a/c functions.
If for some reason, the programmer goes into diagnostic mode, you will get the '00' that you have described.
I would bet you may have a code inside the system.
However, I would most likely tell you that your programmer is at fault.
Best toyou, c4c5
 

AlHale

Member
Joined
Jul 19, 2001
Messages
18
Location
Rockwall, TX
Corvette
1994 LPE
c4c5,
Thanks. I was afraid of that. Have a guess on the cost and ease of installation?

This web site is outstanding... I am glad to be a part of it!

Al
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
Cost and location

Hi there,
The programmer is about $250, I think, and the location is directly above the drivers gas pedal.
It is retained by a 7mm screw at the bottom of the black plastic case.
just remember, you have one electrical connector at the top of the case, and a vacuum harness at theright hand top corner. The vacuum harness is retained by a snap clip, and must be cut off to remove the harness. DONT try to just pull it off, or you will break the plastic lines, and then it will be a real pain.
The electrical connector is just a snap in, and should be removed after the vacuum harness.
Let us know how you do, c4c5
 

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