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-   -   Recirc door/fresh air intake info and questions (http://www.ramforumz.com/showthread.php?t=94470)

starquestbd22 10-17-2011 03:28 AM

Recirc door/fresh air intake info and questions
 
Like many others I am having some HVAC issues related to Dodge's poorly designed air handling system. While test driving the truck last winter my wife noticed cold air coming in from under the dash on the passenger side. I told the salesman and they "fixed" it before I bought the truck. He didn't bother to tell me how and I didn't ask. It didn't take long to figure out it wasn't fixed and a little research (courtesy of heatertreater.com) told me it was probably the recirc door and I have fresh, cold air passing through the exterior intake and out the interior intake. Fast forward through the summer when it didn't really matter and now it's getting time to fix it. So today I pull the glovebox out and drop the fan motor expecting to find a broken door. Nope, it's gone already. Then I get the idea to block off the exterior intake so I loosen the black plastic grille at the base of the windshield and peek under there on the passenger side. I found what I assume is the exterior fresh air intake in the form of an irregular oval shaped hole on the far passenger side and, surprise, it's covered. It looks like it's been sealed up with a rectangular metallic looking flexible sheet that is apparently covered with glue on the bottom side. So I assume this is the dealer fix. Looks like they removed the broken door and sealed the exterior intake.

So can anyone confirm if the hole on the far passenger side of the upper cowl is the fresh air intake?

Also, if it is I don't understand why there is still cold air coming in through the passenger side. Is there anywhere else the air could be coming from? I'm certain it's fresh air coming in somewhere and not the system blowing cold air. The flow is a little weak but the heat does blow from the passenger side foot vent and I can actually hear the air coming in while driving down the road.

Lastly, anyone know of any issues that can be caused by blocking the exterior intake inside the box? I have a template already made to make a blockoff plate.

Sorry this is so long. I'm a descriptive sort of person, lol. Thanks for any advice.

RedRam10 10-20-2011 11:44 PM

I don't have an answer for your issue but I can :icon_bump: this to the top...

frankms 10-22-2011 03:03 PM

The right side behind the glove box is the freash air intake. There is a Modification kit out from Dodge that gets you the complete assembly (Box, Servo, and Door).
This kit also includes 3 of the dervo couplers for the other doors. The new couplers are black instead of the white one from the factory. The stop tabs break off the white ones. The Dodge kit Part number is 68004226AC

frankms 10-22-2011 03:07 PM

Quote:

Originally Posted by starquestbd22 (Post 637670)
Like many others I am having some HVAC issues related to Dodge's poorly designed air handling system. While test driving the truck last winter my wife noticed cold air coming in from under the dash on the passenger side. I told the salesman and they "fixed" it before I bought the truck. He didn't bother to tell me how and I didn't ask. It didn't take long to figure out it wasn't fixed and a little research (courtesy of heatertreater.com) told me it was probably the recirc door and I have fresh, cold air passing through the exterior intake and out the interior intake. Fast forward through the summer when it didn't really matter and now it's getting time to fix it. So today I pull the glovebox out and drop the fan motor expecting to find a broken door. Nope, it's gone already. Then I get the idea to block off the exterior intake so I loosen the black plastic grille at the base of the windshield and peek under there on the passenger side. I found what I assume is the exterior fresh air intake in the form of an irregular oval shaped hole on the far passenger side and, surprise, it's covered. It looks like it's been sealed up with a rectangular metallic looking flexible sheet that is apparently covered with glue on the bottom side. So I assume this is the dealer fix. Looks like they removed the broken door and sealed the exterior intake.

So can anyone confirm if the hole on the far passenger side of the upper cowl is the fresh air intake?

Also, if it is I don't understand why there is still cold air coming in through the passenger side. Is there anywhere else the air could be coming from? I'm certain it's fresh air coming in somewhere and not the system blowing cold air. The flow is a little weak but the heat does blow from the passenger side foot vent and I can actually hear the air coming in while driving down the road.

Lastly, anyone know of any issues that can be caused by blocking the exterior intake inside the box? I have a template already made to make a blockoff plate.

Sorry this is so long. I'm a descriptive sort of person, lol. Thanks for any advice.

If any of the white servo stop tabs are broke off, the door is probably destroyed. If this is the case, pull the dash and rebuild the box.

starquestbd22 10-25-2011 08:21 AM

I bought a 97 cent thin plastic cutting board at Walmart yesterday, cut it to fit, put foam insulation/weatherstripping around the edges, and screwed that bad boy over the fresh air intake vent up under the dash. Presto, fixed.

It was a bit of a PITA because you have to work through the blower motor hole and there is little room and some aggravating angles. But I finally got two screws in it and it seems solid and secure. If it breaks or fails for some other reason I am just going to go the heatertreater route.

whipinalluponya 11-16-2011 06:26 PM

take that stealership!!!!!!(insert middle finger)

kwatson 12-17-2011 11:01 PM

If the weather is damp and you have no fresh air coming in, your windows may fog up. My blender door also broke off and fell over the blower motor, so I just removed it with the intention of trying to fix it someday. That was over a year ago and it hasn't bothered me much at all. And I live in the snowy northwest.

starquestbd22 12-19-2011 07:31 AM

Quote:

Originally Posted by kwatson (Post 676171)
If the weather is damp and you have no fresh air coming in, your windows may fog up. My blender door also broke off and fell over the blower motor, so I just removed it with the intention of trying to fix it someday. That was over a year ago and it hasn't bothered me much at all. And I live in the snowy northwest.

Yeah, now that you mention it the windows have seemed to fog up a little easier since I fixed it. It's nothing the defroster or cracking a window won't fix though. The bigger problem is that as it's gotten colder we have realized there is still a little air coming in under there. The hole under the dash is irregularly shaped and not a completely flat surface so I don't think I have a perfect seal. So my fix has made the problem tolerable but not completely solved it. I will probably let it ride for the remainder of the year and spring for a heatertreater kit before next winter.

Do you not have passengers in your truck very often? My wife had to put her feet up in the seat (no shoes of course, lol) before I fixed it. The cold air coming in was freezing her feet. I could actually feel a little cold air circulating to my side....there was that much coming in. The heater has no problem keeping it warm in the truck even on a low setting but the passenger's feet are in for it, lol.

david rego 12-26-2011 01:53 PM

cold air from vents
 
Why would I have cold air coming in from air vents,

GTyankee 12-26-2011 02:27 PM

David, may i suggest that you go online to YOUTUBE
type in HeaterTreater
there is a section for Dodge, 3 videos from them. Pre 2002 & 2002 & newer
there are also several other videos from other sources, all about the climate control fixes

Good Luck


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