There are others that should not be answering because they don't know anything.
The blend actuators are electric and they are on the passengers side. The drivers is on the bottom, if dual zone the passengers is on the top.
This is not the problem but to clarify, the ambient temperature sensor is below the front headlight. There are 2 there, one is for the rear view mirror. The interior temperature sensor is in the drivers headliner.
BEFORE YOU CHANGE ANY ACTUATOR DOORS CHECK THE HEAD LINER FOR THE AMBIENT AIR TEMPERATURE SENSOR
PART # 22834330 PART COSTS $23.OO. WE CHANGED ALL 4 OF THE ACTUATOR DOORS, THE BLOWER AND THE CLIMATE CONTROL UNIT IN THE DASH.THE AMBIENT AIR TEMPERATURE SENSOR WAS READING AT 110 DEGREES INSIDE OUR 2003 h2. OF COURSE IT WAS NOT 110. WHEN YOU PLACE THE CLIMATE SETTINGS AT 90 DEGREES IT OVER RIDES THE SENSOR IN THE HEADLINER AND YOU WILL GET HEAT.ANY TEMPERATURE LESS THAN 90 WILL BLOW OUT COLD AIR.
THIS IS A COMMON PROBLEM ON TAHOE'S AND HUMMERS.
A 15 MIN OR LESS FIX.
They are not vac on the h2. there is 2 for temp control, one for recirc and one for blend. check the hummer forum as there is a great read for it there. the driver side actuator is really ez as it's under the glovebox, 20 min fix. the rest take removing the whole dash but it's not that tough.
SOURCE: 2004 Hummer H2
If this happen only after you replace the battery, then you need to go look around where the battery is at, maybe a vacum line came off, vents work off of vacum.
SOURCE: were is the gas filter for a 03 hummer h2 located
If you go to autozone.com
register,, enter your car info,,
and you will have a ton of onfo about your car.. Like location on parts on the car,, parts,, part #'s,, how to,, diagrams - etc....
A very good resourse and makes thing allot easier now,, and for future projects..
Cheers !
SOURCE: my 2004 hummer h2 blows hot air out of the drivers
one of your a/c door vacuum actuators is probobly bad.
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