Driver side heater blows cold air HELP!!
 

I've read nearly every post on here regarding the blend door actuators and the issues with the electronic climate controls. Most of what I read is either heat on driver side with cold on passenger, or air not flowing to the proper duct (floor, defrost, etc.). I am capable and prepared to do the work myself, I just need a little more info from you fine folks on this site.

The problem on my 2004 H2 is that on any heat temp or fan setting, the driver side blows cold & the passenger side is hot. All ducts seem to be working properly, just the wrong temperature on the driver side.

I have also learned that there are 4 different actuators in my HVAC unit. Does anyone know in particular which one of the 4 will help 'share' some heat since it's been in the low 30's so far.

I also see 2 part #'s offered by Dorman. The 604-106 ($138.99 AutoZone) and also the 604-121 ($65.99 AutoZone). The Dorman website lists BOTH of these actuators for my 2004. What's the difference??

Signed,
Cold drive to work in STL

heater switch bad
 

there is a switch that controls the ducts which has gone bad.

Bump. Anyone else know anything about this? No matter what temp is set on, driver side is always cool & pass side is HOT, regardless of temp settings.

Bump.

there are 2 actuators to control the temp, one for driver and one for passenger temp . if one goes bad ,were ever the temp was it will stay there and the other will change. i never seen both go bad at the same time . you must check for a signal at ether one . this will let you know if the climate control it self is working. go to a actuator plug end and if you see a signal= [ohms] change as you change the temp on the control unit. no signal change then the controler is bad . if it changes and you dont see the actuator move then it is bad . i would start there. i hope this helps you . :D

Passenger Side Blows Hot Air
 

We had the same problem but with the passenger side (2005 H2). Took it to the mechanic and told us what was wrong (actuator) - called the warranty company - they told him it was the solenoid that that isn't covered. :confused:

I have the same problem on my 03 H2 with 115k miles. So Whats the actual solution? ;) I'm sure this is a common enough problem within our community. PLEASE HELP!!!! THANKS A TON

Bump and bump again. :)

vent temp issue
 

The problem may just be resetting bcm. Try disconnecting both battery terminals and hold them together for a few seconds. This will clear its memory. Most time this will reset the vents. If your bcm sees a issue with a actuator it will stop sending a signal. With luck this will resend and it will work. But one of the temp actuators are probably bad. Good luck

Hi, Had the same problem on my 2004 H2 - I bought the following off Amazon :
Dorman 604-106 Air Door Actuator ($55).

I am very mechanically inclined but I have a great local shop who is very reasonable so I had them install because it's a royal pain in the azz!

Now my heater/air conditioner works perfect. Do some research and you will find that almost all problems like this are due to faulty actuator.