What Is a Heater Actuator?

What Is a Heater Actuator?

A heater actuator, more commonly known as a heater blend door actuator, is a "door" that allows adjustments in temperature of air conditioning and heating in a vehicle. If a car is blowing air of a singular temperature, regardless of adjustment, the actuator is broken and needs to be replaced.

The heater blend door actuator allows the mixture of hot and cold air to reach the desired temperature inside a vehicle. Some newer cars may require removal of additional car parts to get to the heater blend door actuator, and so it may take longer for repairs to be completed.