97 Explorer Air Conditioner Vents
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New User
Joined: Apr 2004
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97 Explorer Air Conditioner Vents
Hi all,
Did the blend door fix a few years ago, you guys are great. I now have a problem where the panel air seems
to divert to the defrost and floor when accelerating. When I let off the gas while driving or sit at idle it blows fine through the panel vents but, as soon as I start driving the air moves to the other positions. When I rev
the engine in park its ok, only when driving.
Any ideas would be appreciated.
Thanks
Did the blend door fix a few years ago, you guys are great. I now have a problem where the panel air seems
to divert to the defrost and floor when accelerating. When I let off the gas while driving or sit at idle it blows fine through the panel vents but, as soon as I start driving the air moves to the other positions. When I rev
the engine in park its ok, only when driving.
Any ideas would be appreciated.
Thanks
Tuned
Joined: Feb 2007
Posts: 288
Likes: 1
From: SW Florida
Welcome to FTE. The various vent doors are vacuum operated. If you have a vacuum leak somewhere in the system I believe it will behave as you describe. I would look at the vacuum lines into and out of the vacuum reservoir, and at the reservoir itself for cracks. I don't know where the reservoir is located on the Gen 2 trucks however. Anyone know where Ford put the reservoir on these?
FTE Chapter Leader
Joined: Mar 2009
Posts: 33,911
Likes: 244
From: Johnstown, PA
A quick google brought me this post from the Explorer Forum...
Hope that helps, the thread context said it was related to the A/C...
Look underneath the passenger side front, just in front of the wheel. There is a panel you will have to remove. Underneath is a black plastic globe about the size of a softball. There will be 2 or 3 vacuum lines running to this. Check that they are attached, and trace them to see if they are leaking or broken. If they are fine, then take off the black globe, which is the vacuum reservoir, and shake it. If you feel a ball rolling around inside, you must replace the reservoir. About $20 at fordpartsnetwork.com. You will need to tell them if your reservoir has 2 or 3 lines connected to it.
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Thanks rrgone,
I did see earlier posts about vacuum leaks and did a quick look see and all seems intact. I think the reservoir is under the air filter in the front right fender but I didn't dig that deep.
I do see the two vac lines that feed the res and console and will draw a vacuum on each and see if they hold.
All of the vent controls work fine ie defrost, floor, panel, etc. except under load when driving. (The panel vents fade)
Not sure why a vac leak would appear only under load.
Seems like a control issue but thats why I'm here.
Thanks Much
I did see earlier posts about vacuum leaks and did a quick look see and all seems intact. I think the reservoir is under the air filter in the front right fender but I didn't dig that deep.
I do see the two vac lines that feed the res and console and will draw a vacuum on each and see if they hold.
All of the vent controls work fine ie defrost, floor, panel, etc. except under load when driving. (The panel vents fade)
Not sure why a vac leak would appear only under load.
Seems like a control issue but thats why I'm here.
Thanks Much
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New User
Joined: Apr 2004
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Hey Guys,
I finally got around to doing the vacuum test and the
vac res seems ok.
I am losing vacuum on the line that feeds the Vapor
Management Valve.
I've searched and read many posts but can't find any
info on how to test the VMV.
Some posts say that the VMV uses Pulse width
modulation.
Should I be able to draw a vacuum on the service port
of the VMV with the electrical disconnected?
Thanks
I finally got around to doing the vacuum test and the
vac res seems ok.
I am losing vacuum on the line that feeds the Vapor
Management Valve.
I've searched and read many posts but can't find any
info on how to test the VMV.
Some posts say that the VMV uses Pulse width
modulation.
Should I be able to draw a vacuum on the service port
of the VMV with the electrical disconnected?
Thanks
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New User
Joined: Apr 2004
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Scratch the VMV idea. Disconnected and plugged all the
connections, still had problem.
Started from scratch at the reservoir it was ok.
Went to the firewall under glovebox, black hose ok, white hose leaking down. Traced back through the firewall to the heater core valve. When I went to pull
the hose off to check the diaphram the hose lifted right
out of the engine compartment. WA LA, broken hose.
Thanks All
Sorry for the self replies, hope this helps others in the future.
connections, still had problem.
Started from scratch at the reservoir it was ok.
Went to the firewall under glovebox, black hose ok, white hose leaking down. Traced back through the firewall to the heater core valve. When I went to pull
the hose off to check the diaphram the hose lifted right
out of the engine compartment. WA LA, broken hose.
Thanks All
Sorry for the self replies, hope this helps others in the future.
Thanks for letting folks know what you found out.
