Heather wont blow cold
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Joined: Oct 2011
Posts: 63
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From: Coeur D'Alene, ID
After laughing through the last few posts.... Lol
Not sure about the C5 but in my past cars that have had heater issues I would first check the "blend" door. Its a vacuum/electronic controlled butterfly valve (similar to the throttle body plate) that opens and closes based on the position of the controls. I imagine there is something similar on our cars, and if that gets stuck (usually because of a small nylon gear) then the door wont open and it wont blow hot air into the ducts.
However, if its not a blend door issue it may be a problem with the blower motor causing the unit to either A.) Not get enough voltage to run or B.) Not push out enough air to get to the cabin.
I would have those looked at or search in the technical how to section to see if theres any issues
Not sure about the C5 but in my past cars that have had heater issues I would first check the "blend" door. Its a vacuum/electronic controlled butterfly valve (similar to the throttle body plate) that opens and closes based on the position of the controls. I imagine there is something similar on our cars, and if that gets stuck (usually because of a small nylon gear) then the door wont open and it wont blow hot air into the ducts.
However, if its not a blend door issue it may be a problem with the blower motor causing the unit to either A.) Not get enough voltage to run or B.) Not push out enough air to get to the cabin.
I would have those looked at or search in the technical how to section to see if theres any issues
Race Director
Joined: Apr 2005
Posts: 11,138
Likes: 11
From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
After laughing through the last few posts.... Lol
Not sure about the C5 but in my past cars that have had heater issues I would first check the "blend" door. Its a vacuum/electronic controlled butterfly valve (similar to the throttle body plate) that opens and closes based on the position of the controls. I imagine there is something similar on our cars, and if that gets stuck (usually because of a small nylon gear) then the door wont open and it wont blow hot air into the ducts.
However, if its not a blend door issue it may be a problem with the blower motor causing the unit to either A.) Not get enough voltage to run or B.) Not push out enough air to get to the cabin.
I would have those looked at or search in the technical how to section to see if theres any issues
Not sure about the C5 but in my past cars that have had heater issues I would first check the "blend" door. Its a vacuum/electronic controlled butterfly valve (similar to the throttle body plate) that opens and closes based on the position of the controls. I imagine there is something similar on our cars, and if that gets stuck (usually because of a small nylon gear) then the door wont open and it wont blow hot air into the ducts.
However, if its not a blend door issue it may be a problem with the blower motor causing the unit to either A.) Not get enough voltage to run or B.) Not push out enough air to get to the cabin.
I would have those looked at or search in the technical how to section to see if theres any issues
Advanced
Joined: Oct 2011
Posts: 63
Likes: 0
From: Coeur D'Alene, ID
Sorry Doje! didnt see your post before mine, as soon as I read the OP just skimmed over and then started writing. Glad to know I was on the right track with my theory
Race Director
Joined: Apr 2005
Posts: 11,138
Likes: 11
From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Further questions for the OP - does it matter if you adjust the dial to floor, defrost, or front? Does cold air blow out on the passenger side? On the floor? on the defrost? on the vent? Try each area individually and report back - AFTER you check the codes.
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From: Should this thoughtful, valuable contribution meet with no acknowledgement or 'thanks' this post----
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3rd Gear
Joined: Mar 2012
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Thanks for the responses everyone.
No, doesn't matter where I'm blowing, it's always hot. Passenger gets the same hot blow as the driver.
The DIC isn't throwing any codes.
I find countless threads for people who have the dual zone climate control, but I haven't been able to find one for those of us with the more primitive setup. My problem does sound like the actuator, but considering that I should only have one, where is it?
The DIC isn't throwing any codes.
I find countless threads for people who have the dual zone climate control, but I haven't been able to find one for those of us with the more primitive setup. My problem does sound like the actuator, but considering that I should only have one, where is it?
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Race Director
Joined: Apr 2005
Posts: 11,138
Likes: 11
From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Thanks for the responses everyone.
No, doesn't matter where I'm blowing, it's always hot. Passenger gets the same hot blow as the driver.
The DIC isn't throwing any codes.
I find countless threads for people who have the dual zone climate control, but I haven't been able to find one for those of us with the more primitive setup. My problem does sound like the actuator, but considering that I should only have one, where is it?
No, doesn't matter where I'm blowing, it's always hot. Passenger gets the same hot blow as the driver.
The DIC isn't throwing any codes.
I find countless threads for people who have the dual zone climate control, but I haven't been able to find one for those of us with the more primitive setup. My problem does sound like the actuator, but considering that I should only have one, where is it?
Every actuator failure I've seen has thrown a code. Guess there's always a first.
