1994 Park Avenue HVAC problem
Thread Starter
Member
Posts like a V-Tak
Joined: Jun 2018
Posts: 36
Likes: 9
1994 Park Avenue HVAC problem
I am helping a friend with his 1994 Buick Park Avenue 3.8 V-6. After having the battery disconnected for about 10 minutes, we discovered an air distribution problem. Now we have air directed toward the windshield and floorboard rather than from the vents on the dash. We are unable to change the direction of the airflow. This model has the automatic type of AC controls rather than a manual slider type. Please advise.
Senior Member
True Car Nut
Joined: Feb 2014
Posts: 2,878
Likes: 1,097
From: Worcester, Ma.
I am sure your temp actuators are electrical.....but are your mode actuators electrical or vacuum? If Vacuum, is it possible you knocked off a vac line from intake or vac tank?
Thread Starter
Member
Posts like a V-Tak
Joined: Jun 2018
Posts: 36
Likes: 9
Update on HVAC problem
I am still looking for a solution. This is a vacuum operated system but do not find any disconnected lines. My guess is that there has been a “spike” issue such as happens to the fuel gauges when they spin beyond the peg during a battery disconnect. We made an error in that the AC control was accidentally left in on position rather than the off position. I do appreciate any thoughts on this subject.
Senior Member
True Car Nut
Joined: Jun 2003
Posts: 7,270
Likes: 465
From: Las Cruces, NM
The air output selector if I remember correctly is vacuum driven by the ECC Unit in the dash (the bit with all the buttons). I believe it has vacuum lines on it, which go to a vacuum tree above the passenger footwell.
I have a similar issue, so I will likely need to dive in there at some point anyway and start sorting it out.
No telling when that will happen though.
I have a similar issue, so I will likely need to dive in there at some point anyway and start sorting it out.
No telling when that will happen though.
Senior Member
True Car Nut
Joined: Feb 2015
Posts: 6,851
Likes: 1,015
From: Earth
Then try again.
Thread Starter
Member
Posts like a V-Tak
Joined: Jun 2018
Posts: 36
Likes: 9
This mystery is now solved. Sorry for the delayed reply but my friend has the vehicle in another location. Additional searching did reveal a disconnected vacuum line. Tech II was correct in his post but we did not spot the line at first. We now have air from the vents as it should.
Thread
Thread Starter
Forum
Replies
Last Post
