kg54trains

Dual control HVAC head unit unit on a 98 coup... The unit workes but the center display on the head unit does not light up.. Dark / Black out center display.. What are my options Replacement / repair..

Rob 02

You can open the back and there are eight surface mount resistors that need to be re-soldered. Over time of heating and cooling the thin solder gets week.

There is a write up on this in the forum. I will try to find it.

Rob 02

Here.

https://www.corvetteforum.com/forums...splay-fix.html

Bill Curlee

There are several FORUM detailed fixes on this issue.

If you cant solder, find someone that can and have them resolder the resistors. It takes about 10 seconds on each resistor with a small soldering iron.

That's all there is to it.

ecrouse

Just make sure when you take it apart that you don't disconnect the wires from the front boards to the rheostats. They don't go back together easily, or at all without soldering.

kg54trains

thanks to all that responded... Gives me options for repair... Happy Holidays

kg54trains

I have been checking and reading all the infor that was suggested to read... One thread had a menber state if it is dimm only it can be repaired.. A repaired unit guide looks like a winner , but as stated my unit all works fine except the center display is blacked out.. The fact that it is not dimmed in the center display but blacked out eliminate my attempts to repair....

SilverC54me

Same issue still. Just carefully re-solder the 8 resistors and the display will come back to life. The difference between dim and no display is that at least one of those resistors is not making contact any more.

Gary

Caveboy

Or change out the bulbs for led

Bill Curlee

Mine went from dim, them to DEAD.. I soldered the resistors and its back to OEM bright!

BC

Rob 02

^Same here.