Problem with air vent system

Reply Subscribe

Thread Tools

Search this Thread

Jun 25, 2010 | 02:53 PM

texrider

Thread Starter

Senior Member

Joined: Jun 2010

Posts: 153

Likes: 4

Problem with air vent system

Air flow changes by itself back and forth from the dash to defrost and back to the dash. Are there leaky vacuum lines causing this or should I perform an "excorcism?"

Jun 25, 2010 | 03:25 PM

rtg143

5 Year Member

Joined: Apr 2010

Posts: 1,771

Likes: 8

From: Newport, Oregon

That usually happens when there's a vacuum leak. When you accelerate, it loses vacuum and shifts to defrost. Start in the engine bay and check the lines, reservoir and check valve.