Windows frost up on the inside
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Junior Member
Joined: Nov 2019
Posts: 4
Windows frost up on the inside
2009 Chrysler Town and Country.
I have an issue with all the interior windows freezing up once outside temps are <25 F. I've had it looked at by the dealer - No issues with the heater core, wet carpet etc. causing extra moisture. The heat blows HOT and the a/c compressor works fine when the heat/defrost setting is on. Windows still stay frosted when I blow the heat on high, if I just run the a/c, or have windows open (to try and release any humidity). The windows will frost whether there is one person or more in the van. Again no problems with the heat being HOT.
Occasionally the windows will not freeze, but more often than not they will. Sometimes I will hear a thunk under the dash like when you switch heat blowing zones from defrost to the forward console to the passengers chest.
Could this issue be one of the actuators letting cold fresh outside air in? If so, any idea which one it could be. I'm having trouble determining if/where a door letting fresh air in would be or what part it is. Also, are there drawings available?
Thank you!
I have an issue with all the interior windows freezing up once outside temps are <25 F. I've had it looked at by the dealer - No issues with the heater core, wet carpet etc. causing extra moisture. The heat blows HOT and the a/c compressor works fine when the heat/defrost setting is on. Windows still stay frosted when I blow the heat on high, if I just run the a/c, or have windows open (to try and release any humidity). The windows will frost whether there is one person or more in the van. Again no problems with the heat being HOT.
Occasionally the windows will not freeze, but more often than not they will. Sometimes I will hear a thunk under the dash like when you switch heat blowing zones from defrost to the forward console to the passengers chest.
Could this issue be one of the actuators letting cold fresh outside air in? If so, any idea which one it could be. I'm having trouble determining if/where a door letting fresh air in would be or what part it is. Also, are there drawings available?
Thank you!
Senior Member
Joined: Jul 2017
Posts: 957
From: Western NY
Where in the USA are you? Just so I know NOT to be there in those temps already... 
These vans have a LOT of glass area and rear sides do tend to mist but even from around Buffalo NY, I've never had those FROST so bad that a 15 minute drive does not clear them(04 T&C). If you're only going short distance, there's not much one can do, But my trick to help speed up "defrosting thins is to crack open the rear windows just enough to let air flow thru the van and out those windows. I get more trouble with the front windshield inside clearing off and have had that "problem" thru many of the numerous vans I've owned over the last 27 years... And NEVER a lack of "hot air" to blame for the condition.
These vans have a LOT of glass area and rear sides do tend to mist but even from around Buffalo NY, I've never had those FROST so bad that a 15 minute drive does not clear them(04 T&C). If you're only going short distance, there's not much one can do, But my trick to help speed up "defrosting thins is to crack open the rear windows just enough to let air flow thru the van and out those windows. I get more trouble with the front windshield inside clearing off and have had that "problem" thru many of the numerous vans I've owned over the last 27 years... And NEVER a lack of "hot air" to blame for the condition.
Senior Member
Joined: Jul 2017
Posts: 957
From: Western NY
Another thought...
IF your van has AUTO TEMP control, take it out of auto mode and use manual, and do not use recirculation mode either. With my older(04 with auto temp), I run in manual mode and draw outside air(not recirc.) in extreme cold weather.
IF your van has AUTO TEMP control, take it out of auto mode and use manual, and do not use recirculation mode either. With my older(04 with auto temp), I run in manual mode and draw outside air(not recirc.) in extreme cold weather.
Thread Starter
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Junior Member
Joined: Nov 2019
Posts: 4
Where in the USA are you? Just so I know NOT to be there in those temps already...
These vans have a LOT of glass area and rear sides do tend to mist but even from around Buffalo NY, I've never had those FROST so bad that a 15 minute drive does not clear them(04 T&C). If you're only going short distance, there's not much one can do, But my trick to help speed up "defrosting thins is to crack open the rear windows just enough to let air flow thru the van and out those windows. I get more trouble with the front windshield inside clearing off and have had that "problem" thru many of the numerous vans I've owned over the last 27 years... And NEVER a lack of "hot air" to blame for the condition.
These vans have a LOT of glass area and rear sides do tend to mist but even from around Buffalo NY, I've never had those FROST so bad that a 15 minute drive does not clear them(04 T&C). If you're only going short distance, there's not much one can do, But my trick to help speed up "defrosting thins is to crack open the rear windows just enough to let air flow thru the van and out those windows. I get more trouble with the front windshield inside clearing off and have had that "problem" thru many of the numerous vans I've owned over the last 27 years... And NEVER a lack of "hot air" to blame for the condition.
Member
Joined: Dec 2012
Posts: 48
From: Merrillville IN
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