I'm having A LOT of window condensation (on the inside) with the black car now that the weather has turned colder. Even if I run the defrost on max it barely keeps up. I never had this issue with the other 3 944's I've had --- any ideas ? Is there some sort of "cabin vent" that might be blocked ?

(Please try to resist any "heavy breathing, making out, high school" jokes - unless they are really good)

 

Your recirc flap is in the closed position.

Cycle the recirc button (three arrows making a circle) and watch the servo motor move and make sure it is connected to the flap. The fix is left as an exercise for the student.

 

Or possibly time for a heater core? (Are you losing any coolant?)

 

No coolant loss, no smell, no residue, it is just water.

 

Check to make sure the heater valve / coolant bypass valve (in engine bay) is opening and closing completely.

 

Are you sure there isnt a leak that lets water leak into the interior?