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.

If you hear a droning or squeaking sound coming from the center of your dashboard, there is most likely something wrong with your blend door actuator. These sounds will usually get louder when you turn on your AC or change the temperature.

You will need a tool set including an 5.5 mm socket for Chevy, GMC, Cadillac, Ford and Lincoln vehicles.

1. Step 1: Remove the Lower Dash Panel or Glove Box.
2. Step 2: Remove the Door Actuator.
3. Step 3: Remove the Actuator.
4. Step 4: Turn the Air Door Pivot.
5. Step 5: Match the New Actuator.

Can I drive with a blend door actuator problem? Driving with a bad blend door actuator may not be comfortable, but it won’t hurt the vehicle.

The average cost for a HVAC blend door actuator replacement is between $295 and $353. Labor costs are estimated between $220 and $278 while parts are priced at $75.

Expect the replacement work to take one to two hours, including testing. Usually a bad or failing power door lock actuator will produce a few symptoms that can notify the driver of an issue that should be serviced. Unusual noises coming from inside the door.

The actuator motors may also make a noise if they’ve failed, but this isn’t always the case. You’ll 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.

Symptoms of a Bad or Failing Front Axle Engagement Switch

1. Difficulty engaging four-wheel drive. One of the first symptoms of a potential problem with the front axle engagement switch is difficulty engaging the vehicle’s four-wheel drive system.
2. Four-wheel drive becomes stuck.
3. Four-wheel drive mode does not activate.

How do I know if my transfer case control module is bad. The common symptom of a bad TCCM is a warning message or warning light on the dashboard. If the transfer case module fails, there will be no power to transfer case shift motor.

Common 4WD problem symptoms:

1. decreased traction in snow or mud.
2. rattling noise when 4WD engaged.
3. “Service 4WD” indicator light is on.
4. can’t disengage 4WD (4WD light on).
5. excessive front tire wear (4WD won’t disengage)
6. excessive fuel consumption (4WD won’t disengage)
7. lack of power (4WD won’t disengage)

How do I reset my transfer case control module? Cheap way – To clear the codes and reset the computer, pull the 5 amp TCCM fuse, located at the bottom of the fuse box. Wait at least a half hour, and then replace the fuse. Turn the ignition key to run, wait for the 4×4 lights to blink, and then turn off.

Here we look at some of the more common signs you may find when you have a bad transfer case:

• Shifting Issues.
• Hard to stay in 4WD?
• 4WD Won’t Engage or Disengage.
• Fluid Puddle Under the Transfer Case’s Location.
• Strange Grinding, Growling or Humming Noises.
• Possible Causes of a Bad Transfer Case.
• So why S&G?

The transfer case module data can be accessed with a scan tool such as the Tech 2, which is GM’s official scan tool. To get to the proper screens, you must choose the Powertrain selection, then navigate your way to the ATC selections. ATC is the GM acronym for active transfer case.