air (ac/vent) blower question
Thread Starter
Drifting
Joined: Jan 2008
Posts: 1,518
Likes: 37
From: The Woodlands Texas
air (ac/vent) blower question
I've got a question on my restored 72 coupe.
When I turn the ac on, I've got a fairly good air flow out of the vents. When its on high, there's a decent volume of air moving. When I turn it to vent instead of ac, the volume of air dropps dramatically. Almost as if I had turned the fan switch to low.
I need help understanding how the system works, and what do I need to look at to fix the issues. I'm thinking the outside air vent isn't opening????
By the way, I stated that with the ac running there's a decent voume of air moving.....it's not great. Is this also a problem or is it normal. I've heard its normal but not sure.
When I turn the ac on, I've got a fairly good air flow out of the vents. When its on high, there's a decent volume of air moving. When I turn it to vent instead of ac, the volume of air dropps dramatically. Almost as if I had turned the fan switch to low.
I need help understanding how the system works, and what do I need to look at to fix the issues. I'm thinking the outside air vent isn't opening????
By the way, I stated that with the ac running there's a decent voume of air moving.....it's not great. Is this also a problem or is it normal. I've heard its normal but not sure.
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
It appears that something is blocking the air flow. I would first remove the passenger kick panel to see if the air door is stuck or is not getting vacuum to open it.
Burning Brakes
Joined: May 2008
Posts: 948
Likes: 1
From: pensacola fl
Air could also be escaping because of bad seals where the air vent and the duct work meet. This is a common problem because of the age of the car. The seals to prevent this from happening have long become dust letting the air escape behind the dash and not into the cabin. Its an easy fix. you can get some thin weather stripping from Lowes etc. and close the area where the vent and the duct meet and I would also use duct tape and wrap around where the vent and duct meet. You will be amazed at how much air you are losing.
Instructor
Joined: Jun 2000
Posts: 174
Likes: 2
From: Fort Smith AR
That white piece of plastic was broken. one of the control cables attached to it.
