Somehow my heater and air distribution controls seem to have seized. The rod control for the air intake/blower assembly (that is hidden behind/underneath the fascia) is covered in rust and is solid, and the vacuum controls to change the air distribution aren't working either. If the internal flaps are mounted on metal spindles, perhaps they've gone rusty and seized too.
I don't quite know how, but on the car I've just bought it appears that water has been allowed to get into the air distribution system.
The blower works fine at all speeds, but you can hear water gurgling about inside, and see it escaping at certain joints behind the glove box.
At the moment I can see no alternative but to pull the entire fascia out in order to try to free up the controls and to trace whether it's due to rain water coming in, or coolant coming out.
I can't remember seeing this issue before, so has anyone else experienced this problem, and if so, what did you do to rectify it?