Ran my heater tonight for the first time since owning the car. Irregardless of the temperature adjustments I only got cold air on the driver side. The passenger side blew hot or cold as I turned the thermostat. Moving the air between floor, defrost, recirculate made no difference; only cold on driver side.

I'm thinking either a stuck blend door or bad climate control module. Anybody have experience with this problem? Is this a take it to the dealership job and expect to spend a fortune because the dash is coming out? Suggestions on where to start looking?


2007 S60 2.5T, 43000 miles.