ac only blows on low

1996 CADILLAC DEVILLE
150,000 MILES
Avatar
DUKE2991
  • MEMBER
  • 1 POST
ac blows on low just fine but when i turn it up it will blow for a second then either cut back to low or wont blow at all. usually works ok at nigh tand sometimes after the car has been running for a while.
May 28, 2012 at 1:16 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
it is an automatic system and the blower control is in the programmer. get a shop with a scan tool to check the system for you to verify a programmer failure.

Roy
May 28, 2012 at 2:01 PM
Avatar
WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
This car uses an electronic blower speed controller which, in this case is built into the blower. The programmer sends the signal to it but the blower is a much more common failure.
May 28, 2012 at 2:54 PM
🔧 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