1991 Audi 100 Repair Question
Asked on December 25, 2012
Audi 100 Heater Problem
I was wondering what could be the cause of my heater not working
Answer
Replied on December 25, 2012
Many things could cause the heater not to work. Check to make sure the coolant level is full, make sure the engine is warming up to a normal operating temp, check the thermostat, check to make sure heater core isn't plugged, check blend air door.