A/C Heat, does not change to floor flow?

1998 ISUZU HOMBRE
490,000 MILES • 4 CYL • 2WD • MANUAL
Avatar
LUV2TRAN57
  • MEMBER
  • 1 POST
Vin#1GGCS1448W8664422
Defrost and Vent air flow work, won't change to floor flow. Which actuator do I need?
Oct 19, 2024 at 4:27 AM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,549 POSTS
There is only one bleed door actuator that is electrical on this vehicle which is at the top of the heater plenum. Remove the glove box door and you should be able to get to it. You may have just lost the vacuum to the HVAC controls.

Here is a guide that can help:

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

I have seen the rotary valve go out as well. Check out the images (below). Please let us know what happens.
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Oct 20, 2024 at 4:10 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
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 new question

Frequently Asked Problems for This Vehicle