Can a blend door actuator cause no heat?
Can a blend door actuator cause no heat? If the door moves easily, then the problem is in the blend door actuator or the heater control head. If the motor fails when the door is closed, that could cause a no heat in car condition. During air conditioning season, a bum blend door actuator can fail in a full or partially open position. How does a blend door work on an AC heater? That control commands the blend door actuator to open or close partially or fully to allow air from the heater core to mix with the cold air...