Cold air thru dash

[Jeff Holtkamp]

Has anyone had a problem with low heat in cab when going down the road and it feels like a draft coming
from the center of the dash? When stopped or low speed it warms up fine.The truck is a 2005 3500 DRW
conventional cab.

 

[Yo Hoot]

Most likely the hater blend door mechanism is stripped. Very common. Mine went once, repaired under warranty... has broke again since. Look up http://www.heatertreater.net/?gclid...A4JRG7BmaMvQFgQDFYNRtadmcatVr2RwaAnAvEALw_wcB

 

[Jeff Holtkamp]

The cold air is not coming thru the vents like it would be if it was the blend air door.It acts like the seals to the HVAC system and cab might be bad.The cold air seems to be
coming from behind the radio area.

 

[Yo Hoot]

Maybe a duct came loose?

 

[Ozymandias]

The cold air is not coming thru the vents like it would be if it was the blend air door.It acts like the seals to the HVAC system and cab might be bad.The cold air seems to be
coming from behind the radio area.

Could be the steering shaft boot, it's outside in the engine bay.

 

[cerberusiam]

It is likely the recirc door on the passenger side of the HVAC box. Have a passenger check that area for a cold draft, should be obvious from behind the glove box.

Best solution is Blend Door USA, heater treater is really junk compared to the Blend Door solution.