Originally Posted by Danthurs
Check the air mix actuator arm. It'* on the passenger side under the dash near the center of the car. I'm guessing it'* not moving so the hot air never gets threw. And I seem to remember that'* vacuum controlled. That module is behind the golve box.
Are these SSEis dual control or single?
There is an electrical air mix actuator on top of the heater box. If you can move the lever arm with a gentle force, the gears inside may have cracked. I took mine on the 98 out and used super glue to fasten the gear to the grey plastic axle which holds the pivot arm. So far it has held.
Here are pictures from the internet that might help.