A/C and Heater Control problem

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Jul 22, 2008 | 05:35 PM

1992B4C

Thread Starter

Racer

Joined: Sep 2003

Posts: 368

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From: Chicago IL

A/C and Heater Control problem

My heater control panel is malfunctioning. I looked into replacing it and HOLY CR@P!!! those are expensive (I have 1990 coupe with C68)

My question is.....

Are the 90-03 the same as the 94-96 electronically? Could I get a 94-96 and exchange the front panels?

If not, anyone got one they want to sell?

Jul 22, 2008 | 09:20 PM

Wildride

Burning Brakes

Joined: Sep 1999

Posts: 786

Likes: 31

Cruise-In II Veteran

Have you tried cleaning the contacts on the control head. This fixes 90% of the problems people have with the unit.

Try this link:

http://forums.corvetteforum.com/show....php?t=1519199

Jul 23, 2008 | 03:21 PM

1992B4C

Thread Starter

Racer

Joined: Sep 2003

Posts: 368

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From: Chicago IL

Not only do the buttons not work, the display is acting up as well. would cleaning the contacts be the solution still?

Jul 24, 2008 | 10:46 AM

1992B4C

Thread Starter

Racer

Joined: Sep 2003

Posts: 368

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From: Chicago IL

Quote:

Originally Posted by 1992B4C

Not only do the buttons not work, the display is acting up as well. would cleaning the contacts be the solution still?

anyone got any opinions

Jul 24, 2008 | 07:50 PM

Wildride

Burning Brakes

Joined: Sep 1999

Posts: 786

Likes: 31

Cruise-In II Veteran

You say that "the display is acting up". What do you mean? Is it flashing continuously or intermittently or what?

Flashing often means the HVAC computer is trying to tell you that something is wrong with the system. To check for codes try this link:

http://www.idavette.net/tech/c4diag.htm

Some additional ideas on fixing intermittents:

https://www.corvetteforum.com/techti...D=92&TopicID=2
https://www.corvetteforum.com/techti...=118&TopicID=2

This link has more information on the C68 Electronic Control than you will ever need:

http://batee.com/corvette/acrepair/c...oard/c68.shtml

Jul 26, 2008 | 11:16 AM

1992B4C

Thread Starter

Racer

Joined: Sep 2003

Posts: 368

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From: Chicago IL

Thanks for all the help. Just cleaning the contacts solved everything!

The display was flashing, it was just not displaying the numbers correctly.

Jul 31, 2008 | 05:31 PM

dgkinba

Cruising

Joined: Nov 2007

Posts: 12

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Good old ebay

I was having similar problems last summer and found a used one one ebay for $50. It has worked fine since then. I didn't keep the site name, but by various searches you should be able to locate one.

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