Hard to say - not being very careful when replacing the battery can generate voltage spikes that can damage electronic equipment in the vehicle, or put certain processors in a locked up state. You can try disconnecting the negative battery cable for a few minutes and then reconnect it to see if the various systems reset themselves. If the problem persists, your HVAC control module may be damaged.
As far as the rear air is concerned, you first should check the wiring and connector on the switch - may not have been connected properly, the switch may have been damaged or a wire may have been cut.
SOURCE: There is no air flow
You need part GM Part number 89018675 or ACDelco 15-73596. The Mode Selector Actuator. What happens is the part is a CHEAP part POORLY designed and when it goes to turn the flaps inside the HVAC unit its the plastic gear slips instead of turning the flap!!!
Just to forward you you might want a deal to install this art for you unless your good at fixing your own vehicle, because you need SMALL sockets and a lot of patience to get this part in!!!
The part is ALMOST directly above the steering shaft for your steering wheel, so theres a lot you got to remove before you will even see them!!!
I only recommend you to have a dealer put this part in for you, unless you have your own service manual!!
Because there is 5 of these darn things and if you pick the wrong one you will have to do it all over again!!!
3 on the Drivers side and 2 on the Passengers side!!
But replacing this part SHOULD solve all your problems!! AS it did for me and i was having the same issues as you have described!!
SOURCE: Air Conditioner blows hot on one side after battery DC
You need to replace the driver side temperature door control actuator. While doing this... make sure you bolt the new one in AND THEN PLUG IT IN or it will spin and not line up in the right place... then there is a series of crazy steps to fix that problem.
SOURCE: ac and heat will not blow threw vents just floor and defrost
Sounds like your selector switch is messed up to select where you want the flow of air to go. When you turn the switch to where you want the air to go does it work on floor and when you turn the switch to vent it doesn't?
SOURCE: 2003 Trailblazer No air from front face vents
first check to see if you have power going to the actuators when you switch the switch to it location if no power replace controller if you have power and no movement from actuators replace actuator. if actuators move remove hvac box and check for broken blend doors.
SOURCE: My vents on my 2004 Chevy Trailblazer won't blow
vent actuator control has lost vacume source. check for disconnected vacume lines at actuators at blend doors.also check vacume lines in engine compartment. these small vacume lines brake easily also can be deteriated near battery due to battery acid contamination
103 views
Usually answered in minutes!
×