Windows won't defrost while driving.
Nov 23, 2020 at 8:39 PM
Defrost not working properly
2009 CHEVROLET IMPALA
NAUJ
- MEMBER
- 1 POST
- FOLLOW
Advertisement
JACOBANDNICKOLAS
- ✓ASE Certified Mechanic
- 110,193 POSTS
Hi,
Are you getting airflow to the windshield? Is the air coming into the vehicle warm? Does the AC work?
There is an actuator called the mode door actuator that directs airflow. I need to first know the answers to the above questions to better direct you.
I attached a pic below showing the location of the mode door actuator, but I don't want you to go through the trouble of removing it until I know if there is or isn't airflow at the windshield. Also, let me know if you can change between the floor and vents.
Also, make sure you are allowing fresh air to enter the vehicle. Don't keep it on recirculate all the time. Note, that if the A/C is nonfunctional, that will lessen the effectiveness of the defroster.
Let me know.
Joe
Are you getting airflow to the windshield? Is the air coming into the vehicle warm? Does the AC work?
There is an actuator called the mode door actuator that directs airflow. I need to first know the answers to the above questions to better direct you.
I attached a pic below showing the location of the mode door actuator, but I don't want you to go through the trouble of removing it until I know if there is or isn't airflow at the windshield. Also, let me know if you can change between the floor and vents.
Also, make sure you are allowing fresh air to enter the vehicle. Don't keep it on recirculate all the time. Note, that if the A/C is nonfunctional, that will lessen the effectiveness of the defroster.
Let me know.
Joe
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Nov 23, 2020 at 9:26 PM
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.