Longtime reader / first-time poster here, begging for a bit of help. Here's my issue:
Yesterday, I changed the battery in my STS. I didn't take any steps to preserve the memory (lesson learned).
Immediately afterward, I took the car in for inspection. It failed because the defroster wasn't working. I was very surprised, as I drive this car every day and hadn't noticed this issue. So I feel about 90% certain that it started when I changed my battery. When I got home, I played around with it some more and discovered that the vent selector control simply wasn't working at all. (i.e., no matter what it's selected to, the car blows air out of the dash and bottom vents).
So in short: Does anyone have any thoughts on how changing a battery could cause the vent selector control to stop working?
Here's what I've tried already:
(1) I thought I might have blown a fuse, but I opened up the fuse box and pulled the blower and CCP fuses, but they looked fine.
(2) I thought (and still suspect) that unplugging the battery may have done something to the computer's HVAC software, so I tried to reset it by unplugging the battery a few more times, but had no luck.
Any thoughts would be greatly appreciated! It's a bit tough to find an honest mechanic where I live, so I'm trying to narrow things down as much as possible on my own first. Thanks in advance!
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Update:
Here's someone describing the same issue with their 2003 Chevy Silverado: http://smith-wessonforum.com/lounge/265214-replaced-battery-ac-vents-not-working.html
The fix proposed on that thread doesn't seem to work for my Caddy, but it does lead me to believe that the issue is with the computer.
Yesterday, I changed the battery in my STS. I didn't take any steps to preserve the memory (lesson learned).
Immediately afterward, I took the car in for inspection. It failed because the defroster wasn't working. I was very surprised, as I drive this car every day and hadn't noticed this issue. So I feel about 90% certain that it started when I changed my battery. When I got home, I played around with it some more and discovered that the vent selector control simply wasn't working at all. (i.e., no matter what it's selected to, the car blows air out of the dash and bottom vents).
So in short: Does anyone have any thoughts on how changing a battery could cause the vent selector control to stop working?
Here's what I've tried already:
(1) I thought I might have blown a fuse, but I opened up the fuse box and pulled the blower and CCP fuses, but they looked fine.
(2) I thought (and still suspect) that unplugging the battery may have done something to the computer's HVAC software, so I tried to reset it by unplugging the battery a few more times, but had no luck.
Any thoughts would be greatly appreciated! It's a bit tough to find an honest mechanic where I live, so I'm trying to narrow things down as much as possible on my own first. Thanks in advance!
----------
Update:
Here's someone describing the same issue with their 2003 Chevy Silverado: http://smith-wessonforum.com/lounge/265214-replaced-battery-ac-vents-not-working.html
The fix proposed on that thread doesn't seem to work for my Caddy, but it does lead me to believe that the issue is with the computer.