A/C problem passenger side
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Joined: Apr 2004
Posts: 55
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From: griffin ga
A/C problem passenger side
Went to NC in the winter and used the heater, now it's getting warm and when I turn the A/C on it blows cold on the driver and center but blows hot on the passenger side, I have turned the passenger **** back to cold and tried everything I can think of to change but nothing is working. Any help is appreciated. 
Advanced
Joined: Apr 2005
Posts: 69
Likes: 5
From: Phoenix Arizona
I had the sam issue last week- my lovely wife loves the heater. What resolved my issue was turning the passenger side to cold and turning off the engine, after a minute a so I started it and it still blew hot when i selected it to the cold position. On the second restart it worked (I do have the digital temp thingie, sorry its late in the night). Try putting the passenger side temp select in the middle position if the above does not work. Good luck.
Instructor
Joined: Aug 2000
Posts: 155
Likes: 0
From: Northern NJ
GM issued service bulletin 03-01-39-004 in April of 2003 concerning erratic operation of the dual zone a/c in the '97-'03 C5's
Basically, if the control **** is turned too quickly the HVAC controller misreads what it's expected to do.
The cure is to shut off the vehicle, then restart it. The HVAC controll will reset and everything should be ok
Basically, if the control **** is turned too quickly the HVAC controller misreads what it's expected to do.
The cure is to shut off the vehicle, then restart it. The HVAC controll will reset and everything should be ok
