How to replace heater blend door?

They are usually behind the centre console and glove box

https://www.google.com/search?q=2006+Chevy+HHR+6%2C+2.4L.+replace+the+blend+door+actuator

..

1. Locate the blend door actuator. The actuator is located behind the dashboard, usually on the passenger side. It is a small, rectangular motor with a wiring harness and a linkage arm.
2. Disconnect the battery. Before beginning any work on the electrical system, disconnect the battery to avoid any electrical shorts or other accidents.
3. Remove the dashboard panel. In order to access the blend door actuator, the dashboard panel may need to be removed. Consult the vehicle's repair manual for specific instructions on how to remove the panel.
4. Remove the old blend door actuator. Disconnect the wiring harness and the linkage arm from the old blend door actuator. Remove any mounting screws or bolts that secure the actuator to the dashboard.
5. Install the new blend door actuator. Install the new blend door actuator in the same location as the old actuator. Secure the actuator with any mounting screws or bolts. Connect the wiring harness and the linkage arm to the new actuator.

How To Install Replace AC Heater Temperature Actuator ...

? 4:40
https://www.youtube.com/watch?v=mVP09M7hLB4
Jul 21, 2014 - Uploaded by 1A Auto Parts
http://www.1aauto.com/temperature-blend-door-actuator/i/ ... To Install Replace AC Heater Temperature Actuator 2000-05 ChevyMonte Carlo.

2006 Monte Carlo: Blend Door Actuator Replacement ...

? 2:19
https://www.youtube.com/watch?v=_B17o-Ljhfs
Mar 31, 2015 - Uploaded by Adam Strojny
In this video I will show you guys how to replace the actuators behind the glove compartment that where causing ...

Chevy Blend Door Actuator Replacement - Part 3 - YouTube

? 12:26
https://www.youtube.com/watch?v=1q9ugwlqDoo
May 14, 2013 - Uploaded by Dan Abbott
My final step to replacing the blend door actuator. ... Thanks for the video, need to do this on my 04 monte carlo ss, went to use the heat today .... 2003 Chevy Suburban AC-heater air direction problem.mov - Duration: 1:36. by ...

check HVAC fuse.if fuse okay heater control module could be the problem.

Heater valve is stuck or needs replacement. I doubt if it is the knob. If you coolant hasn't been flushed out for a few years ..get it flushed and replace the valve. GM uses dexcool coolant that still to this day gums up when it get old and can mess up valves and gaskets.

The heater blend door actuator is not opening the door.Check for power at the actuator and if you have power at the actuator and its not working then replace the actuator.These actuators are a well known culprit of this problem.You find the actuator behind the glove box it will have a small arm on it that operates the heater blend door.

Sounds like the heater control actuator/door isn't opening. Should be under the dash middle to passengers side... on the heater box. The temp switch on the dash causes the actuator to open and close the baffle/door. It may have an arm thet moves the door or it might be that the actuator itself mounts to the heater box. With vehicle running, turn the temp control and watch to see if the actuator is moving. One actuator will move to position the defrost/mix/vent/floor... usually on the drivers side middle... the other should open the heater blend door. Usually hard to get to on most vehicles. Hope this helps, Mike

The most likely cause is a failed blend door actuator; however I recommend a little troubleshooting. First, can you hear a clicking sound behind the dash when you turn the setting to hot? If yes, it is certainly the actuator stripping its gears. If not, check to make sure the heater hoses are both hot as they connect to the heater core at the firewall (in the engine compartment). If one or both of the hoses do not get hot, there is a blockage caused either by an air bubble or a stuck water control valve in the heater hose. If the hoses are both hot, the indication is again the blend door actuator.

Below are instructions for replacing the actuator. Look at the diagrams carefully--the big arrows point to the front of the truck and the actuator is on the side of the heater box above the outlet duct that runs to the driver's side of the floor. Also, the actuator is expensive, so I recommend you make sure it's bad and shop around a bit to get a good price. To check out the actuator, first see if you can turn the blend door by hand. If you can't turn it, maybe it's jammed. Also, reconnect the actuator after removing it and see what it does when you turn the heater to hot.

Removal & Installation

1. Remove the floor air outlet duct extension (1) from the floor duct (2).
   

   

Fig. Remove the floor air outlet duct extension (1) from the floor duct (2)

Disconnect the electrical connection at the blend door actuator (#10 in pic below).

Fig. Blend door actuator and related components

Remove the blend door actuator mounting screws from the HVAC module.

Remove the blend door actuator as an assembly with the actuator cam.

Fig. Remove the blend door actuator mounting screws from the HVAC module

To install:

1. Install the blend door actuator as an assembly with the actuator cam.
   1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
   2. Line up the A/C valve lever with the blend door actuator cam
   
   
2. Install the blend door actuator mounting screw to the HVAC module.
   1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).
   
   
3. Connect the electrical connection at the blend door actuator (10).
4. Install the floor air outlet duct extension (1) to the floor air duct (2).

Picture of actuator:

The blend door is stuck in cold position. That usually happens because the blend door actuator has failed.

You will need to test and replace the blend door actuator.

To replace the actuator you will need to take apart the dash and remove completely the instrument panel,d isconnect the connector, remove the four screws, remove the temperature blend door actuator and replace it.

The replacement is not a job for beginners, since you have to take apart the dash to access the actuator.

Regards.