Strange Heater Problem

Hey All:

Think I've got a new one here - I did a search, and couldn't find anything:

The heater in my Jeep blows warm on the passenger side, cold on the driver side.

Everything else heater related seems to be functioning normally.

I'm stumped - I would have thought that the vents for both the driver and passenger side are routed to the same source? Are there vacumn motors buried somewhere under the dash which control only one side or the other?

Thanks,
Chris

According to the FSM, at least for 95,. there is only one floor door. Oddly enough, I have a similar problem with mine, except it blows cold on the passenger side. The cold air seems to come from deep under the dashboard, but I can't find where. I suspect an air leak, but have been unable to find it.