Climate Control/HVAC Blower
Thread Starter
Instructor
Joined: Mar 2018
Posts: 234
Likes: 2
From: Edwardsburg Michigan
Climate Control/HVAC Blower
Thank you in advance! Any help/advice/guidance is appreciated!
I am having a weird problem. My Blower Motor was working completely normal up until I pulled my battery. Now, the blower is unresponsive to what the Climate Control is set to. Whenever the Blower does work, it goes to whatever speed it wants which is normally a Low Speed or High Speed. Other than that, no matter what, it doesn't come on. So far I have replaced the Blower Motor Module and I have verified that the blower itself does work by taking it out and hooking power directly to it.....I have also verified that all the fuses are good....
The only thing I haven't swapped yet is the Climate Control unit itself.
I am having a weird problem. My Blower Motor was working completely normal up until I pulled my battery. Now, the blower is unresponsive to what the Climate Control is set to. Whenever the Blower does work, it goes to whatever speed it wants which is normally a Low Speed or High Speed. Other than that, no matter what, it doesn't come on. So far I have replaced the Blower Motor Module and I have verified that the blower itself does work by taking it out and hooking power directly to it.....I have also verified that all the fuses are good....
The only thing I haven't swapped yet is the Climate Control unit itself.
Melting Slicks
Joined: Jul 2004
Posts: 3,294
Likes: 482
From: Brea CA
Is this the dual zone automatic climate control or the manual control?
If it is the automatic dual zone I would do the following, unplug the controller form the harness and plug it back in. This will reset it.
If it is the manual system, the fan switch could be bad. This is a replaceable part.
Gary
If it is the automatic dual zone I would do the following, unplug the controller form the harness and plug it back in. This will reset it.
If it is the manual system, the fan switch could be bad. This is a replaceable part.
Gary
Thread Starter
Instructor
Joined: Mar 2018
Posts: 234
Likes: 2
From: Edwardsburg Michigan
Is this the dual zone automatic climate control or the manual control?
If it is the automatic dual zone I would do the following, unplug the controller form the harness and plug it back in. This will reset it.
If it is the manual system, the fan switch could be bad. This is a replaceable part.
Gary
If it is the automatic dual zone I would do the following, unplug the controller form the harness and plug it back in. This will reset it.
If it is the manual system, the fan switch could be bad. This is a replaceable part.
Gary
I do know that I have a bad driver side temp actuator but that should not cause the fan to randomly work and not work..(most of the time not work..)
Thread Starter
Instructor
Joined: Mar 2018
Posts: 234
Likes: 2
From: Edwardsburg Michigan
Racer
Joined: Jun 2017
Posts: 401
Likes: 79
From: Northeast PA
Since you said that you replaced the battery, brought a thought to mind... the whole HVAC shebang uses vacuum from hard plastic lines that happen to run underneath the battery compartment. Suggest looking in that area for the vacuum supply lines to see if any of them are cracked or broken... it is a known ailment of C5's & early C6's with the older type batteries to leak with acid falling on wire looms & vacuum lines. In my diagnosing an AIR system CEL & it's failure to work, the culprit was a broken vacuum line aft of the PCM under the battery tray... no vacuum to the AIR solenoid was the root cause, & the HVAC vacuum supply also works off of this. Once I fixed this both then AIR & HVAC worked as it should. You may have to look very carefully, follow the lines from the AIR solenoid down past the PCM under the battery to the T where the lines all intersect.
https://www.corvetteforum.com/forums...-teaser-2.html
https://www.corvetteforum.com/forums...-teaser-2.html
Pro
Joined: Nov 2018
Posts: 674
Likes: 102
I had a similar problem with mine . There is a relay in the passenger foot well above the bcm that had a loose connection
prior to finding that the blower wouldnt work and I got it to come on once by moving the harness under the battery, but the relay finally solved the problem
prior to finding that the blower wouldnt work and I got it to come on once by moving the harness under the battery, but the relay finally solved the problem
Thread Starter
Instructor
Joined: Mar 2018
Posts: 234
Likes: 2
From: Edwardsburg Michigan
I had a similar problem with mine . There is a relay in the passenger foot well above the bcm that had a loose connection
prior to finding that the blower wouldnt work and I got it to come on once by moving the harness under the battery, but the relay finally solved the problem
prior to finding that the blower wouldnt work and I got it to come on once by moving the harness under the battery, but the relay finally solved the problem
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