Quote Originally Posted by old guy View Post
Flap position only. The heater core circulation doesn't change, just the air being directed through the core. I'm pretty sure that the G113 is the one that directs flow between the A/C evaporator coils and the heater core. I will check the Bentley tonight.
I was wrong. the G113 position sensor controls the flap motor as SeatownB6 pointed out. Probably not related to your no heat condition. I assume you are getting plenty of air flow through the vents, just no heat. correct? If so I'm back to thinking you still have air present in the heater circuit.