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  #1  
Old 01-10-2012, 12:11 AM
profweather profweather is offline
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Default Unequal airflow from heater

Just noticed the airflow from the heater (air directed at the feet) changes intensity depending upon acceleration and deceleration of the truck (the blower motor does not change is speed/noise). On accerelation the flow decreases (to nearly non-existant). Coasting/idle causes the airflow to return. On another related issue, when the truck is started after sitting overnight all airflow is directed at the feet for about 2 seconds before it is directed to where the HVAC controls are set.

I'm sure this is vacuum problem. Has anyone else experienced this? Where is the vacuum canister on this 1500 Express?
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Old 01-10-2012, 02:29 AM
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spymac spymac is offline
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I have noticed this issue with my express but haven't paid much attention to it. I'll have to do a little test tomorrow to see if it's as bad as yours. I usually drive with the heater on low with music on so it's hard to tell. Not sure about the canister location tho.
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Old 01-10-2012, 08:50 AM
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I have never noticed this issue in mine in a year of ownership, but I also keep mine on "auto mode" and it doesn't even come on till the engine warms up to operation temp. Not sure where the vacuume canister is if there is one.
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Old 01-10-2012, 12:07 PM
Rambunkshuss Rambunkshuss is offline
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I`ve never owned a dodge product that hasnt done this. Years ago, when you stepped on the gas in my old dodge`s, the heat would go cold due to vacuum loss, let off the gas pedal, heat would come back. My 2010 truck does the same thing as all my older dodge`s have done. I dont know for sure if dodge still use`s a vacuum source within their heating units today or not. If they do, they should wake up and fix the problem like everybody else has. Another thing i`ve noticed with these 4th gen trucks, every once in awhile you would experience a cold draft coming from somewhere. I dont think dodge will ever get it right with their heating & A/C units. I`ve owned chevy`s toyota`s ford`s (all trucks), not a one of them has ever had this issue like the dodge`s have had.
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Old 01-10-2012, 07:35 PM
profweather profweather is offline
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Thanks for the replies. It is not terribly bad but more of an annoyance. I've never owned a Dodge and still like the truck.
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