1999 Corvette heater problems
Thread Starter
2nd Gear
Joined: Jan 2013
Posts: 2
Likes: 0
1999 Corvette heater problems
I have a problem im hoping someone can help me with.
when i turn on my heater and defroster mod i only get warm air on the passenger side .
alsoo i need to know if the a/c light should be on in defrost mod.
when i turn on my heater and defroster mod i only get warm air on the passenger side .
alsoo i need to know if the a/c light should be on in defrost mod.
Thread Starter
2nd Gear
Joined: Jan 2013
Posts: 2
Likes: 0
i have been to 2 different gm dealers with this problem
might as well went to a grade school for all the good they do
i will look into this blender door myself any idea where i can see some pictures of the assembly?
might as well went to a grade school for all the good they do
i will look into this blender door myself any idea where i can see some pictures of the assembly?
Burning Brakes
Joined: Jun 2010
Posts: 1,014
Likes: 5
From: Rockwall TX
First thing is to check for codes on the DIC. If there is a problem it should have a code in the HVAC area. You also might try a couple of things to reset the actuators (search- there is a fuse in the passenger footwell to pull, or disconnect the battery ). There is a lot of information on this on the forum. Do a search. If I had the info I would post it for you, but I am sure someone else will. Must not be very good dealers if they didn't know how to address this issue.
Pro
Joined: May 2012
Posts: 692
Likes: 13
From: Lithia Springs Georgia
You likely have a bad blend door actuator on the drivers side. You can change it out from under the dash, it is a pain but doable. Like mentioned check the codes and do a reset first.
BTW - A/C light should be on in defrost mode.
BTW - A/C light should be on in defrost mode.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
YES!! AC will be ON in the defrost mode. To prevent it from defaulting into the defrost mode, you need to program MEM-1 and or MEM-2 to a mode other than deforost.
Read your DTCs. IF,, you have any HVAC codes,, clear them and see if any return. Resetting the DTCs (if there are any) will usually cause a reset. You may need to reset the DTCs 5-6 times before the issue goes away.
BC
Read your DTCs. IF,, you have any HVAC codes,, clear them and see if any return. Resetting the DTCs (if there are any) will usually cause a reset. You may need to reset the DTCs 5-6 times before the issue goes away.
BC
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you program MEM1-2 and if the memory reverts back to default (defrost) you are having a 12vdc battery or power issue
Last edited by Bill Curlee; Jan 30, 2013 at 01:52 PM.
