Climate Control Unit 1994
Thread Starter
1st Gear
Joined: Aug 2008
Posts: 1
Likes: 0
Climate Control Unit 1994
Can anyone help with instructions on the proper removal method of the climate control unit from the dash of a 1994 Corvette? My unit is intermeintently inoperative and I need to replace it. Any suggestions on where to buy a replacement unit would also be appreciated.
Thanks
Thanks
Burning Brakes
Joined: Sep 1999
Posts: 786
Likes: 31
Cruise-In II Veteran
Probably just needs the contacts cleaned. An easy DIY project. Cleaning the contacts solves 90% of the problems.
These instructions are from another (unknown-the original post was lost when the Corvette Forum software was upgraded a few week ago):
[B]"Some of the instructions were vague so I am going to re-write them here while it is still fresh in my mind. Older dash and console disassembly may be slightly different but once the climate control box is out then I think all steps may be the same to open and clean the climate control box.
Start by removing the lid to the arm rest center console (4 bolts). Do not remove the wires. Just tuck the arm rest lid behind the seat out of the way. Next, empty the center console contents and lift up the carpet liner inside to expose the two screws at the rear of the shifter plate. Also remove the cup holder inserts.
Remove the two rear shifter plate screws and the one screw under the cup holder. Pull the gear shifter to rear and slide the shifter console plate back exposing the screws attaching the bottom of the climate control panel/radio trim plate. You should not have to remove the gear shift ****. There is room to move the shift console back enough to see the screws.
Remove the screws from the bottom of the climate control trim plate.
Next, remove the central A/C vent (2 screws) above the climate control.
When that’s done, you’ll see a third screw that’s holding the top of the
radio/CC trim piece in that needs to be removed.
After that trim piece is off, you’ll notice the two bolts holding the CC unit in place, remove them. The unit will now slide straight out, and you can unplug it from the wiring harness in the rear by squeezing the top of the plug to release the plug clip and work the plug out.
Take the CC unit inside to a clean well lit place to work on it. There will be 6 “small” 3/16” bolts that need to come out. One tip I can give you is this
- when you’ve get all 6 removed (two on the back surface, and 4 around the perimeter), point the face of the CC unit towards the ground while separating the two halves - you don’t want the
- individual buttons to fall all over the place. With that complete, you will be able to remove the internals. There will be 2 circuit boards joined like a “T”. They simply unplug by pulling the two of them apart. Disconnect the small wiring harness and set the larger of the two circuit boards aside.
Holding the control button unit CAREFULLY remove the 4 light bulbs (will look like grey plastic plugs from the back) with a skinny flathead screwdriver - they should take about a 1/4 turn counterclockwise to “unlock.” There are two small 3/16” screws in the center of the circuit board holding it to the button holder case, remove them. Lift off the green circuit board and gray rubber contact pad from the buttons. Lay the button holder off to the side. Do not turn it over or the buttons will fall out.
Proceed with cleaning the button contacts on the green board and be able to tell what I’m talking about when you have it apart) with a soft” clean pencil eraser, and then give it a good wipe with some Isopropyl Alcohol pads. After it’s dry re-assemble and head back to the car, plug it in to the wiring harness for a test - it should work as new!
Re-assemble all other trim pieces, etc. in the order they were removed. Shouldn’t take more than an hour.. .maybe a tick more depending on how careful you are. It really “IS” an easy job."
These instructions are from another (unknown-the original post was lost when the Corvette Forum software was upgraded a few week ago):
[B]"Some of the instructions were vague so I am going to re-write them here while it is still fresh in my mind. Older dash and console disassembly may be slightly different but once the climate control box is out then I think all steps may be the same to open and clean the climate control box.
Start by removing the lid to the arm rest center console (4 bolts). Do not remove the wires. Just tuck the arm rest lid behind the seat out of the way. Next, empty the center console contents and lift up the carpet liner inside to expose the two screws at the rear of the shifter plate. Also remove the cup holder inserts.
Remove the two rear shifter plate screws and the one screw under the cup holder. Pull the gear shifter to rear and slide the shifter console plate back exposing the screws attaching the bottom of the climate control panel/radio trim plate. You should not have to remove the gear shift ****. There is room to move the shift console back enough to see the screws.
Remove the screws from the bottom of the climate control trim plate.
Next, remove the central A/C vent (2 screws) above the climate control.
When that’s done, you’ll see a third screw that’s holding the top of the
radio/CC trim piece in that needs to be removed.
After that trim piece is off, you’ll notice the two bolts holding the CC unit in place, remove them. The unit will now slide straight out, and you can unplug it from the wiring harness in the rear by squeezing the top of the plug to release the plug clip and work the plug out.
Take the CC unit inside to a clean well lit place to work on it. There will be 6 “small” 3/16” bolts that need to come out. One tip I can give you is this
- when you’ve get all 6 removed (two on the back surface, and 4 around the perimeter), point the face of the CC unit towards the ground while separating the two halves - you don’t want the
- individual buttons to fall all over the place. With that complete, you will be able to remove the internals. There will be 2 circuit boards joined like a “T”. They simply unplug by pulling the two of them apart. Disconnect the small wiring harness and set the larger of the two circuit boards aside.
Holding the control button unit CAREFULLY remove the 4 light bulbs (will look like grey plastic plugs from the back) with a skinny flathead screwdriver - they should take about a 1/4 turn counterclockwise to “unlock.” There are two small 3/16” screws in the center of the circuit board holding it to the button holder case, remove them. Lift off the green circuit board and gray rubber contact pad from the buttons. Lay the button holder off to the side. Do not turn it over or the buttons will fall out.
Proceed with cleaning the button contacts on the green board and be able to tell what I’m talking about when you have it apart) with a soft” clean pencil eraser, and then give it a good wipe with some Isopropyl Alcohol pads. After it’s dry re-assemble and head back to the car, plug it in to the wiring harness for a test - it should work as new!
Re-assemble all other trim pieces, etc. in the order they were removed. Shouldn’t take more than an hour.. .maybe a tick more depending on how careful you are. It really “IS” an easy job."
Pro
Joined: Mar 2000
Posts: 504
Likes: 9
From: Youngstown Oh
Instruction Location
I wrote those instructions a couple years ago. They used to be at this web address
http://forums.corvetteforum.com/show....php?t=1519199
If that does not work email me at TiIngot@aol.com with your fax number and I will send them to you.
http://forums.corvetteforum.com/show....php?t=1519199
If that does not work email me at TiIngot@aol.com with your fax number and I will send them to you.
Drifting
Joined: Dec 2003
Posts: 1,492
Likes: 94
From: Westfield MA
I followed those instructions last night and mine works great now, it was so frustrating before to change the temperature or fan speed and now it works just like it was supposed to. Thanks to the original drafter and those that passed it on.
Intermediate
Joined: Aug 2007
Posts: 43
Likes: 0
From: Cypress Texas
Before you buy another unit.......
Before you search all over for a replacement....let me suggest you read my thread since I am in the middle of a similar problem. I have a brand new unit that I picked up last week and it did not fix the problem....nor did cleaning the contacts.
http://forums.corvetteforum.com/show....php?t=2151606
http://forums.corvetteforum.com/show....php?t=2151606
