Can`t set temp on climate control.. Help
Thread Starter
Racer
Joined: Aug 2008
Posts: 477
Likes: 1
From: Fredrikstad, Norway - sorry if my english isnt to good...
Can`t set temp on climate control.. Help - Fixed
Hi!
I'm having problems with the A/C climate control on my 1999 coupe. It only allows you to drop one degree at a time, then two minutes later another degree, two minutes another degree, etc.. The system don`t throw any codes.. Has anyone experienced this problem?
Thanks,
Frank K.
I'm having problems with the A/C climate control on my 1999 coupe. It only allows you to drop one degree at a time, then two minutes later another degree, two minutes another degree, etc.. The system don`t throw any codes.. Has anyone experienced this problem?
Thanks,
Frank K.
Last edited by Norwegian-Vette; May 21, 2014 at 06:23 AM.
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
Frank
I have not seen that particular issue but,, it would have to be HVAC Control Module related.
Try this:
Measure the voltage that is being supplied to the HVAC Module Fuse. There are TWO test slots on top of all fuses. Measure the test slots to a good chassis ground. You should see full battery voltage on the fuse. Make sure that you test BOTH HVAC Module fuses.
If the voltage is LOW, it could be causing issues with the way the module works. One of the fuses is only powered when the ignition is ON.
You can also remove and unplug the mdule and test the Ground Wire for proper resistance to chassis ground. Should be ZERO Ohms on the Black wire/ white stripe.
If all is normal, you may just have a bad control module.
Bill
I have not seen that particular issue but,, it would have to be HVAC Control Module related.
Try this:
Measure the voltage that is being supplied to the HVAC Module Fuse. There are TWO test slots on top of all fuses. Measure the test slots to a good chassis ground. You should see full battery voltage on the fuse. Make sure that you test BOTH HVAC Module fuses.
If the voltage is LOW, it could be causing issues with the way the module works. One of the fuses is only powered when the ignition is ON.
You can also remove and unplug the mdule and test the Ground Wire for proper resistance to chassis ground. Should be ZERO Ohms on the Black wire/ white stripe.
If all is normal, you may just have a bad control module.
Bill
Thread Starter
Racer
Joined: Aug 2008
Posts: 477
Likes: 1
From: Fredrikstad, Norway - sorry if my english isnt to good...
Frank
I have not seen that particular issue but,, it would have to be HVAC Control Module related.
Try this:
Measure the voltage that is being supplied to the HVAC Module Fuse. There are TWO test slots on top of all fuses. Measure the test slots to a good chassis ground. You should see full battery voltage on the fuse. Make sure that you test BOTH HVAC Module fuses.
If the voltage is LOW, it could be causing issues with the way the module works. One of the fuses is only powered when the ignition is ON.
You can also remove and unplug the mdule and test the Ground Wire for proper resistance to chassis ground. Should be ZERO Ohms on the Black wire/ white stripe.
If all is normal, you may just have a bad control module.
Bill
I have not seen that particular issue but,, it would have to be HVAC Control Module related.
Try this:
Measure the voltage that is being supplied to the HVAC Module Fuse. There are TWO test slots on top of all fuses. Measure the test slots to a good chassis ground. You should see full battery voltage on the fuse. Make sure that you test BOTH HVAC Module fuses.
If the voltage is LOW, it could be causing issues with the way the module works. One of the fuses is only powered when the ignition is ON.
You can also remove and unplug the mdule and test the Ground Wire for proper resistance to chassis ground. Should be ZERO Ohms on the Black wire/ white stripe.
If all is normal, you may just have a bad control module.
Bill
Hi!
Thanks for the reply Bill! I have borrowed a module from a buddy with a 97. With this module, everything works, so i have a bad module.. I have tried to find bad soldering points and even resoldered a few, but no luck yet.. I will keep on trying to find what is wrong with my module.. Every suggestion on what to look for is deeply appreciated
Thanks,
Frank
Last edited by Norwegian-Vette; May 8, 2014 at 02:51 PM.
5th Gear
Joined: May 2014
Posts: 5
Likes: 0
From: edmonton alberta
dido +
im having the same issues with my 99 coupe. I just replaced the battery and then the problems began.
but im also getting codes b0365c,b0446c (telling me bad ground and door stuck open). which is causing cold 1 side and warm on the other side.
Although when the codes are reset the doors are moving ,but it only last for a few seconds and the codes return.......
I have an old led display I will try , but that's tomorrow.
but im also getting codes b0365c,b0446c (telling me bad ground and door stuck open). which is causing cold 1 side and warm on the other side.
Although when the codes are reset the doors are moving ,but it only last for a few seconds and the codes return.......
I have an old led display I will try , but that's tomorrow.
7th Gear
Joined: May 2014
Posts: 7
Likes: 0
Hi!
Thanks for the reply Bill! I have borrowed a module from a buddy with a 97. With this module, everything works, so i have a bad module.. I have tried to find bad soldering points and even resoldered a few, but no luck yet.. I will keep on trying to find what is wrong with my module.. Every suggestion on what to look for is deeply appreciated
Thanks,
Frank
Thanks for the reply Bill! I have borrowed a module from a buddy with a 97. With this module, everything works, so i have a bad module.. I have tried to find bad soldering points and even resoldered a few, but no luck yet.. I will keep on trying to find what is wrong with my module.. Every suggestion on what to look for is deeply appreciated
Thanks,
Frank
Thread Starter
Racer
Joined: Aug 2008
Posts: 477
Likes: 1
From: Fredrikstad, Norway - sorry if my english isnt to good...
Try this forum link, hopefully this fixes it. Good luck! http://forums.corvetteforum.com/c5-t...splay-fix.html
Thread Starter
Racer
Joined: Aug 2008
Posts: 477
Likes: 1
From: Fredrikstad, Norway - sorry if my english isnt to good...
Problem fixed
Hi
Now my HVAC panel is working great again Found a cheap module here in Norway, this module had the dark dim display, resoldered the bad points on the circuit board, and voila!
Frank
Now my HVAC panel is working great again
Found a cheap module here in Norway, this module had the dark dim display, resoldered the bad points on the circuit board, and voila!Frank
