Heater not working on drivers' side?

1995 CADILLAC DEVILLE
132,457 MILES • 4.9L • V8 • AUTOMATIC
Avatar
JOHN ERVIN2
  • MEMBER
  • 1 POST
I get heat only on a passenger side driver side blows cold air.
Dec 20, 2022 at 8:30 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

On most vehicles, this would indicate a faulty blend air door/air mixt actuator-related issue. However, and correct me if I'm wrong, this vehicle doesn't have dual climate control.

Instead, the air temperature entering the vehicle is controlled by a programmer which receives your request and then adjusts the temp as requested.

What I suspect is the controller isn't fully operational. So, here is what I suggest: Confirm the controller is responding correctly and isn't failing.

Take a look at the pics below. I provided the diagnostics related to the air temp programmer. Take a look through them and let me know if you are comfortable performing them.

Let me know.

Joe

See pics below.
Dec 20, 2022 at 10:41 AM
Avatar
JOHN ERVIN2
  • MEMBER
  • 1 POST
Yes I will try.
Dec 21, 2022 at 2:04 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.