Heater vents control not working properly

1998 SUBARU LEGACY
97,000 MILES
Avatar
VALERIEWADE76
  • MEMBER
  • 1 POST
When you switch from defrost to vents or vise versa in the wintertime (when it's cold), it won't switch until you've driven the car 10-20 minutes. I can let my car warm up for 15 minutes or 40 minutes and it still doesn't switch until you've driven it for 10-20 minutes. Any ideas? Thank you!
Sep 20, 2019 at 10:41 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Welcome to 2CarPros.

There is a component called a mode door actuator. It is responsible for the air flow direction. Now, since it does work after some time, I suspect it is either going bad or the mode door is sticking.

Here is the bad part for servicing this component. Step 1 is remove instrument panel. I attached a picture of the component so you can see what it looks like. If you want to try replacing or inspecting it, let me know. If you look at the second pic, you will see how the heater and AC unit are behind the glove box. The actuator is on the left side of that unit. You may be able to access it if you remove the glove box.

Let me know if I can help.

Joe
Images (Click to enlarge)
Attached Media
Attached Media
Sep 20, 2019 at 7:53 PM