Heater temperatures are different side to side

Tiny
GTX6970
  • MEMBER
  • 2012 RAM 1500
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 96,000 MILES
The outlet temperatures on passenger side are nice and warm. But not near as warm on driver's side. This is a manual temperature control single zone system. Heater outlet temperatures do change with rotation of the dash control knob as normal
Am I looking at a possible broken door or control inside the box?
Do you
have the same problem?
Yes
No
Wednesday, October 13th, 2021 AT 6:09 AM

3 Replies

Tiny
KASEKENNY1
  • EXPERT
More than likely you have an issue with one of the blend doors or the rod that connects them, or the actuator.

Here is a guide that shows how to replace the actuator on a different vehicle, but it is pretty standard.

https://www.2carpros.com/articles/replace-blend-door-motor

Take a look at the picture below and it will show the detail you need on this system. Even though you have a single zone temperature control, you still have two blend doors, they are just connected by a rod that will move both doors together based on the movement of the actuator shown below.

Again, I am sure you have an issue with one or both of these doors or the rod. I would access the actuator and move the doors manually and see if you have even heat. If not, then it is not the actuator.

Run through this and let us know if you have questions on this. Thanks
Was this
answer
helpful?
Yes
No
Wednesday, October 13th, 2021 AT 1:51 PM
Tiny
GTX6970
  • MEMBER
Thanks for the reply. I've already determined the actuator is fine.
And did some more digging into this and found there is a plastic connector inside the box joining the two doors together. I have a feeling this coupling is damaged and not allowing the driver's side door to move. These is no external link as you show in picture #1.
Was this
answer
helpful?
Yes
No
Thursday, October 14th, 2021 AT 5:52 AM
Tiny
KASEKENNY1
  • EXPERT
Okay. That picture is from a 2014 truck, so I assumed it was the same as they were the same DS classic trucks. However, they may have changed the design of it, but the idea is the same. There are two doors that are connected by a rod (internally or externally) and controlled by the single actuator.

So, if the actuator is fine then that is the issue. The reason they made these external in later years was because of this issue. They are just a little easier to get to when they are external like in the picture above. However, this rod is what needs to be looked at next.

Let us know what you find. Thanks
Was this
answer
helpful?
Yes
No
Thursday, October 14th, 2021 AT 8:57 AM

Please login or register to post a reply.

Sponsored links