What causes a blend door actuator to go bad?

[tinyladybug283]

What Causes a bad blend door actuator? A blend door actuator is linked to an air control door pivot found on the last drive of the unit; a plastic gear set is frequently rotated from one side to another by the electric motor.An actuator can become faulty if the plastic gear set turns out to be fragile and it breaks.

[heavymouse448]

The symptoms of a bad blend door actuator include a lack of heat or air conditioning, or failure of air to blow through some or all of the vents. The actuator motors may also make a noise if theyve failed, but this isnt always the case.

Secondly, what does a bad actuator sound like? Youll notice is makes a popping noise when it is commanded. The popping will persist for a moment. Of coarse the actuator does not achieve the commanded position. Though only the recirculation door actuator is featured in the video other actuators in the heating and a/c system often fail in a similar fashion.

In this way, how long does it take to replace a blend door actuator?

one to two hours

How do you fix a blend door actuator?

Heres how. Consult the repair manual to identify which actuators control the defrost-vent-floor “mode door” and the temperature-regulating “blend door.” Then peer under the dash and locate the suspect actuator on the heater box. Have a friend switch between modes or temperatures while you watch the actuator.