Issues with c5 climate control, working inconsistently
Thread Starter
Drifting
Joined: Nov 2005
Posts: 1,924
Likes: 275
Issues with c5 climate control, working inconsistently
I have a 98 Vert, the lights on climate control are always working as they should. When I push each button it makes the adjustment on the screen as it should. But half the times the fan wont blow at all, even if I turn the control up to 100% it’s still won’t blow any air.
after you push a bunch of random buttons it’s like out of nowhere it will start blowing air. It’s very unpredictable and annoying. Possibly a short in the control box? Or more of a blower motor type of issue?
after you push a bunch of random buttons it’s like out of nowhere it will start blowing air. It’s very unpredictable and annoying. Possibly a short in the control box? Or more of a blower motor type of issue?
Instructor
Joined: Aug 2009
Posts: 243
Likes: 27
From: New Jersey
I just had a similar experience. AC was working fine yesterday morning. Then after work the blower would not come on at all. The digital display and everything looked normal and I could hear the compressor kicking on. Blower hasn't worked since.
I've done some searching and have narrowed it down to checking the blower motor and looking at the control module. I dug around and checked the connections by the motor after work today, but ran out of daylight. So didn't make any progress yet. Also want to check all the grounds to make sure they are good also. No codes were thrown.
So I'd be interested in hearing others recommendations also on what to check.
I've done some searching and have narrowed it down to checking the blower motor and looking at the control module. I dug around and checked the connections by the motor after work today, but ran out of daylight. So didn't make any progress yet. Also want to check all the grounds to make sure they are good also. No codes were thrown.
So I'd be interested in hearing others recommendations also on what to check.
Instructor
Joined: Aug 2009
Posts: 243
Likes: 27
From: New Jersey
NCALI, I saw in another post you mentioned the relay above the BCM in the passenger footwell having a loose connection. Is that the gray relay to the left? I believe the black on to the right is for the column lock.
Thread Starter
Drifting
Joined: Nov 2005
Posts: 1,924
Likes: 275
After doing some reading I’m leaning towards it being the blower motor resistor. I have another c5 in my garage so might be a good time to swap some parts and see where the issue is. I’ll report back when I dial it in 👍
Thread Starter
Drifting
Joined: Nov 2005
Posts: 1,924
Likes: 275
this car just had the battery replaced and it wasn’t the damn blower motor resistor like I thought it would be just wasted $100 for a new one. What is a tech 2 and how can I get this thing working normally again?
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Melting Slicks
Joined: Aug 2006
Posts: 3,123
Likes: 116
From: North Dallas Forty Orange County, Ca.
St. Jude Donor '08-'09-'10-'11-'12-'13, '15,'21
Here’s the answer for your code, whatever this means...
Auxiliary heater flame sensor circuit high
https://obdii.pro/en/code/B0466
GM:
Auxiliary heater flame sensor circuit high
https://obdii.pro/en/code/B0466