Stuck hot air vent door?
#1
Stuck hot air vent door?
OK, I have one main issue and a sub-issue: 1998 S70 GLT, 249k
Main issue: Heat always comes out the right side floor and dash vents when A/C is on. I get cold air on the left.
After taking out the glove compartment & right bolster (I am in the process of replacing a leaky heater core) I can see what looks like the a duct door pivot point (black rod with a square-ish hole in the end on the the side of the heater core box) move in slight increments when I move the ECC vent control, but it doesn't look like it moves very much and my suspicion is that the duct door that closes off the hot air is stuck or the servo motor is bad.
What I hoped to do was somehow manually move the door shut by turning the pivot (or helping the servo do it) to close off the hot air from the core. That would get me thru the summer anyway. Any experience with this, or perhaps exactly what the problem is would be appreciated. Searches revealed some comments about servo re-calibration, but I wasn't feelin' it. Valid?
Sub-issue: I thought I would compare the right-side pivot movement with the left side, but I can't figure out how to get the left knee bolster out. There were two nuts on the far left similar to those on the right bolster. I found two bolts (smaller head size than the nuts) in the center and on the right side of the (left) bolster, but I was leery about removing them without being sure of their purpose. If there are some left bolster instructions here, please point me in the right direction.
Sorry for the long post. Thanks in advance for any help!
Main issue: Heat always comes out the right side floor and dash vents when A/C is on. I get cold air on the left.
After taking out the glove compartment & right bolster (I am in the process of replacing a leaky heater core) I can see what looks like the a duct door pivot point (black rod with a square-ish hole in the end on the the side of the heater core box) move in slight increments when I move the ECC vent control, but it doesn't look like it moves very much and my suspicion is that the duct door that closes off the hot air is stuck or the servo motor is bad.
What I hoped to do was somehow manually move the door shut by turning the pivot (or helping the servo do it) to close off the hot air from the core. That would get me thru the summer anyway. Any experience with this, or perhaps exactly what the problem is would be appreciated. Searches revealed some comments about servo re-calibration, but I wasn't feelin' it. Valid?
Sub-issue: I thought I would compare the right-side pivot movement with the left side, but I can't figure out how to get the left knee bolster out. There were two nuts on the far left similar to those on the right bolster. I found two bolts (smaller head size than the nuts) in the center and on the right side of the (left) bolster, but I was leery about removing them without being sure of their purpose. If there are some left bolster instructions here, please point me in the right direction.
Sorry for the long post. Thanks in advance for any help!
#2
Thread
Thread Starter
Forum
Replies
Last Post
elbert
Volvo S70
11
10-18-2011 10:54 AM