AC control module part numbers and where to find? 2005 Escalade

[adventurenali92]

The front climate control module is super easy to do. My 2006 Denali xl had this issue the first week of June. The control module went bad and would not shut off the HVAC system even when the key was turned off. Until I got the new part. I pulled the relay in the under hood fuse block to keep the HVAC turned off. I replaced it with a new module from NAPA auto parts and it all functions as it should. It’s a very simple job to do. The module is located in the front passenger foot well behind the black plastic kick box just under the glove box compartment. A few bolts and screws and it was replaced and I did not need to program the new module. I did have to splice a couple wires together as the new part doesn’t have a matching harness, I believe because GM changed the part somewhere along the line. But it was only two or three wires to splice together and then the new one worked perfectly. Haven’t had any issues since.

 

[drhill]

Ok,2 years later, I never figured this out. I bought a knock off Tech 2 and used it a couple times but I couldn't figure out how to update the firmware for the front and rear module. I may just go to junkyards etc and find replacement modules. I know the rear module is back by the pass rear panel where the actuators and evap/heater core are located. Where is the module for the front actuators? Mainly concered with the temp control....thx!

 

[Fless]

The front "module" is the HVAC control head. If it's just temperature changes that are happening or it jumps numbers you can clean the pots that adjust the temp numbers.

Are you using it on AUTO or manual?

 

[drhill]

oh ok, I'm using it on manual I think....I set the temp and then set the fan speed manually to what I want. I sent it out and had it refurbished 4 years ago when I bought the truck but it's acting up and jumping numbers again. The biggest issue is when the system freaks out and randomly switches the driver side from full cold to full hot and I have to turn the truck off and restart to get it to switch back to cold

 

[S33k3r]

oh ok, I'm using it on manual I think....I set the temp and then set the fan speed manually to what I want. I sent it out and had it refurbished 4 years ago when I bought the truck but it's acting up and jumping numbers again. The biggest issue is when the system freaks out and randomly switches the driver side from full cold to full hot and I have to turn the truck off and restart to get it to switch back to cold

I hate to tell you this... But it is likely not the controls. It sounds like a blend door is going out on you.

 

[Fless]

Yes, when you set the blower motor speed it's in manual. If you want to see what the internals look like see this post:

What did you do to your NBS GMT800 Tahoe/Yukon Today?

Why not buy a used one? 15-20 yr old plastic likely to break

www.tahoeyukonforum.com

I used electronic cleaner on the two potentiometers to clean the internal contacts since my temp setting was jumpy.