Karl,  Both the dash vent come from the same chamber in the heater.  I�d be suspecting something in the duct rather than in the heater itself.  I can take pictures if you�d like. I have a spare heater out of the bus.

Jim

[We have] socialism for the rich and rugged free market capitalism for the poor.
-- Martin Luther King, Jr.

On Apr 13, 2014, at 1:41 PM, Karl Wolz <wolzphoto@Q.COM> wrote:

> I'm getting full fresh air flow through the passenger side dash vent, but
> almost none out of the driver's side.  Pulled the flex tube off the heater
> box/blower, and no air flow there either.  I had to patch things back up,
> and now need to make the vent work.