06 2500 2wd Mega Cab Turbo. Backseat floor vent not showing any airflow on either A/C or heat. Haynes manual has zero info to trouble shoot. Where to start looking for the cause of no airflow?

 

On that, I have no clue. Post up in the Third Gen Ram section, someone there should know what they are doing. I sure don't.

Welcome to DF!

 

Welcome to DF

 

I'd guess the ductwork running back has come loose. Is there air coming from under the seat?

 

I've not felt any and was looking for a blown fuse but not seeing one for that either. I actually like the idea that on the rear vent- face up for A/C or face down for heat???? No switch to turn on/off or anything relative to the backseat.

 

If it works up front, it isn't likely to be a fuse. Is there a rear blower?

 

I have no personal experience but I have done research on adding a rear AC to a quad cab setup. I don't believe they have rear blowers, just ductwork running to the front. I'd say a broken rear AC blend door might be a cause.

 

Not feeling any air from floor center console to back vent. Closed off all dash vents and feel some air coming from driver side floor vent but same flow with dash vents open Next is taking the dash out and looking there. NEW ISSUE: passenger dash vents not as cool as driver side and passenger temp control seems to be working correctly.