2000 Ram Van-Windows fogging
Record Breaker
Joined: Dec 2005
Posts: 1,412
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From: Nashville
RE: 2000 Ram Van-Windows fogging
ORIGINAL: alloro
When I changed my heater core a few weeks back I figured I'd clean and lubricate that fresh air door and all the linkage that goes to it. I glad I did that because I found a bunch of dirt and junk inside the front opening of the vacuum actuator. This stuff was keeping the door from operating it's full swing. You might want to pull that actuator out and inspect it.
When I changed my heater core a few weeks back I figured I'd clean and lubricate that fresh air door and all the linkage that goes to it. I glad I did that because I found a bunch of dirt and junk inside the front opening of the vacuum actuator. This stuff was keeping the door from operating it's full swing. You might want to pull that actuator out and inspect it.
Registered User
Joined: Dec 2008
Posts: 2
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Help, my windows fog as well!!
How do I find and service the outside air valve you mention, this sounds like the first place to start!!
Also, is it a regular Ram Van for cargo or a Ram Wagon for passengers?
The cargo types (work vans) really don't have this problem at all since they are an enclosed box shell of a vehicle.
If a passenger Ram Wagon, is it 8-, 12- or 15-passenger.
All of this makes a big difference dealing with the fogging of the windows.
It seems that the B1500 and B2500 conversion vans have less window fogging than the typical Dodge 8, 12 or 15 passenger Wagons. The reasoning behind this is that the conversion companies take the Ram Van (cargo type) and convert them with their own seats, plushness, and carpeting.
As for the basic Ram Wagons or 8, 12, or 15 passenger using the typical Dodge carpeting and cloth bench seats, fogging is very plenty.
The more the heat is turned up in the van, the more the fogging happens as things defrost on the boots, clothing, carpet and seats. Plus, breathing adds mositure too!
You'll have to play with the temp control setting at just above the middle range and no higher. Next, get some rubber floor mats to place over the carpeting. I've known in some cases people have removed the carpeting and took the Ram Van (cargo) rubber floor and swapped out their Ram Wagon carpeting to greatly reduce this fogging problem.
As for the seats, you can spray a Scotch Guard coating onto them to prevent the fabric to breath. But make sure the seats are clean and low in moisture first.
Much of this problem of fogging is with the 1998 and newer Ram Vans/Wagons when the HVAC system was refreshed to a different design.
If you have a B2500 or B3500 with the rear HVAC unit, try to run it less. In my B2500 2000 12-passenger with cloth seat, and carpeting, I took the rear unit apart and disconnected the electronic actuator. Then I manually put the valves to blow the air to the chest and headliner and not the feet. If air is past to the floor, more mositure is picked up to evaporte to fog the windows !!! The rear unit is made by Denso and the front unit is made by Valeo or Berhe for our model years.
So, this time of year, keep the feet cold to prevent the moisture from getting up to the windows.
Also, there is an outside air valve to the front HVAC system that opens and closes depending on what mode level the air blows to (feet, chest, head). I took off the vacuum actuator that controls this and placed it in full outside air mod. This way, it prevents further fogging of the windows since the air isn't in any recirc.
I live in a very humid mostiure location down the raod from Niagara Falls. So, I can relate to the fogging of the windows and the cold outdoors. Having five or more passengers can make fogging a real challege to control. I would need to crack open the drivers side window the space of an average pencil to aid in the control.
Hope this helps some.[/quote]
Also, is it a regular Ram Van for cargo or a Ram Wagon for passengers?
The cargo types (work vans) really don't have this problem at all since they are an enclosed box shell of a vehicle.
If a passenger Ram Wagon, is it 8-, 12- or 15-passenger.
All of this makes a big difference dealing with the fogging of the windows.
It seems that the B1500 and B2500 conversion vans have less window fogging than the typical Dodge 8, 12 or 15 passenger Wagons. The reasoning behind this is that the conversion companies take the Ram Van (cargo type) and convert them with their own seats, plushness, and carpeting.
As for the basic Ram Wagons or 8, 12, or 15 passenger using the typical Dodge carpeting and cloth bench seats, fogging is very plenty.
The more the heat is turned up in the van, the more the fogging happens as things defrost on the boots, clothing, carpet and seats. Plus, breathing adds mositure too!
You'll have to play with the temp control setting at just above the middle range and no higher. Next, get some rubber floor mats to place over the carpeting. I've known in some cases people have removed the carpeting and took the Ram Van (cargo) rubber floor and swapped out their Ram Wagon carpeting to greatly reduce this fogging problem.
As for the seats, you can spray a Scotch Guard coating onto them to prevent the fabric to breath. But make sure the seats are clean and low in moisture first.
Much of this problem of fogging is with the 1998 and newer Ram Vans/Wagons when the HVAC system was refreshed to a different design.
If you have a B2500 or B3500 with the rear HVAC unit, try to run it less. In my B2500 2000 12-passenger with cloth seat, and carpeting, I took the rear unit apart and disconnected the electronic actuator. Then I manually put the valves to blow the air to the chest and headliner and not the feet. If air is past to the floor, more mositure is picked up to evaporte to fog the windows !!! The rear unit is made by Denso and the front unit is made by Valeo or Berhe for our model years.
So, this time of year, keep the feet cold to prevent the moisture from getting up to the windows.
Also, there is an outside air valve to the front HVAC system that opens and closes depending on what mode level the air blows to (feet, chest, head). I took off the vacuum actuator that controls this and placed it in full outside air mod. This way, it prevents further fogging of the windows since the air isn't in any recirc.
I live in a very humid mostiure location down the raod from Niagara Falls. So, I can relate to the fogging of the windows and the cold outdoors. Having five or more passengers can make fogging a real challege to control. I would need to crack open the drivers side window the space of an average pencil to aid in the control.
Hope this helps some.[/quote]
Registered User
Joined: Jan 2009
Posts: 4
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I had the same problem as the original poster just last week. It was indeed the fresh air intake door stuck in the closed position causing the cabin air to recirculate all the moisture. It is a good sized job to disassemble the A/C components to access the door which was rusted closed. Once the door was freed, the ice on the windows has disappeared. However now taking in the cold outside air, the cabin is a little cooler. At least I can see.
