Help! Problem with Air Vents

[bumpin_99]

When I turn my knob to the left to A/C or Max A/C for 1 it doesnt get that cool and 2 when I press on the gas nothing comes out of the vents at all. When I release the gas some air starts to come out of the vents but once I try speed up it completely shuts off the air again. When I turn the knob to the right to any of the other positions like defrost, face and legs, face, legs I dont have this problem and the air blows out like it should. I would like to get this fixed before it really starts to get hot.

Does anyone have any Ideas?

please leave me a message on here or email me at illinibball89@hotmail.com

Thanks for your help.

 

[bumpin_99]

by the way I have a 2001 Ford Explorer Sport.

when you put on the gas you can actually hear the vents shut.

 

[bobflood]

by the way I have a 2001 Ford Explorer Sport.

when you put on the gas you can actually hear the vents shut.

Sounds like a bad vacuum reservoir - either the reservoir itself or the vacuum line to it. System uses engine vacuum to move air flow doors around; when you accelerate engine vacuum goes down and won't hold the door in place w/o reservoir. In my 97 EB, the reservior is in the passanger side front wheel well; you have to remove the fender liner to see it. You should see a plastic vacuum line coming thru the firewall under the coolant and WW tanks. Good luck.

 

[bumpin_99]

do you know if it is hard to repair?

 

[bobflood]

do you know if it is hard to repair?

Usually pretty easy. Worst case is a visit to a JY to get a replacement. Best case is just re-plugging in a vacuum line.

 

[bumpin_99]

I was able to get to the vacuum reservoir. the lines look fine i shook the vacuum reservoir to see if there was any rattling but I didnt hear anything. I was wondering how if anyone knew how to unhook it and if it was ok to unhook. I just didnt want anything to happen if it was unhooked.

 

[bobflood]

do you know where it is located. I have been searching online and I did read that sometimes it is located front right of the truck

See above in post #3:
"In my 97 EB, the reservior is in the passanger side front wheel well; you have to remove the fender liner to see it. You should see a plastic vacuum line coming thru the firewall under the coolant and WW tanks. Good luck."

 

[bobflood]

I was able to get to the vacuum reservoir. the lines look fine i shook the vacuum reservoir to see if there was any rattling but I didnt hear anything. I was wondering how if anyone knew how to unhook it and if it was ok to unhook. I just didnt want anything to happen if it was unhooked.

Look in post #4 of attached thread - couple of very helpful liks from Turdle.
http://www.explorerforum.com/forums/showthread.php?t=303406&highlight=vacuum+reservoir

 

[bumpin_99]

i pulled out the vacuum hoses and you can hear air come out of the vacuum reservior. I didnt see any cracks and I didnt hear any sounds when I shook it. So I am guessing there is a vacuum hose that is leaking somewhere.

 

[bobflood]

i pulled out the vacuum hoses and you can hear air come out of the vacuum reservior. I didnt see any cracks and I didnt hear any sounds when I shook it. So I am guessing there is a vacuum hose that is leaking somewhere.

I would start engine with vacuum likes unhooked, then see if the line from the intake manifold is pulling a vacuum. If it is, hook it back up to the reservoir, plug the reservoir outlet, and see if it holds vaccum when someone else hits the gas pedal. I believe that there is a one-way valve on the intake side of the reservoir that is supposed to close when the intake vacuum drops. If that checks out OK, then look for a vacuum leak between the reservoir and the inside A/C panel.

 

[vezul22]

I drive a 98 AWD Explorer. I bought it in 2005, at which time the air temperature control was not working. So essentially, I could either get hot air with the heater or vents on, and cold air with the AC. But I could turn the system off and close the vents as well. A while ago, the AC stopped working and at the same time my vents started blowing out hot air. The air gets hotter as I drive more miles, and it blows from all vents in the truck, including the ones by my feet. There is no way to shut it off, and AC does nothing. I have read a bit about blend doors and am not sure if that is my problem. PLease let me know what you think.

 

[bumpin_99]

well my problem was a hose in the dash came off. just had to reattach it and secure it and now my ac works again.