Air conditioner problim

2000 CHEVROLET BLAZER
233,000 MILES • 4.3L • V6 • 4WD • MANUAL
Avatar
AHMED KAMAL
  • MEMBER
  • 2 POSTS
When I start the engine I noticed the climate control system seems to be loosing the effect on the air blend passage doors with noisy opening/closing, it starts blowing very cold air then followed with very hot air and so on, but after long driving it comes back to normal. It happens again if I switch off and restart the engine.
Mar 4, 2016 at 1:51 PM
Advertisement
Avatar
WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
Is it an automatic temperature control system or manual?
Mar 4, 2016 at 10:25 PM
Avatar
AHMED KAMAL
  • MEMBER
  • 2 POSTS
Yes it is an automatic temperature (climate control system).
Mar 7, 2016 at 3:11 AM
Avatar
WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
Check fuse #19 labeled RDO battery. It sounds like the module is not retaining memory. It goes through a self test whenever the power is disconnected, but it's not supposed to do it by merely shutting the key off. I'm thinking it may not have any keep alive memory power.
Mar 7, 2016 at 3:19 AM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,710 POSTS
It sounds like the blend door actuator is going bad, here is more information on it

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

and video

https://www.youtube.com/watch?v=Eqf-H3COtSo

please let me know how it goes
Mar 11, 2016 at 12:20 PM
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