Skip the auto shop - Our mechanics make house calls

Q: AC actuator making popping noises

asked by on

I think I need to replace the AC actuator at the firewall under the dash. It makes a popping noise when the truck is initially cranked, and again after the truck is shut off.

A: Hi, there are blender doors that control wh...

Hi, there are blender doors that control where hot and cold air go inside the cabin. The motors that control the doors eventually go bad and can start making some clicking or popping noises. Does the sound occur when turning on the A/C? You’ll need to find the faulty motor and replace it to get rid of the sound. A certified technician, such as one from YourMechanic, can help you determine which motor is creating the sound and help you replace it.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Gear always in Drive

I'm assuming that you mean that the D4 light is lit up on the dash not that the transmission is in gear. The D4 light indicates a problem with the electrical system, and codes will need to be pulled off...

Q: Truck runs fine til warm. Have replaced distributor cap, plugs, wires, rotor button, tps, coolant temp sensor, idle air c 1997 Chevrolet Sierra 4.3 L

Hi - there your symptoms suggest the truck runs too lean when it gets hot. (I am taking the position that there are no problem codes and your Check Engine is not illuminated - if so pay attention to those...

Q: We changed the temperature sensor because we broke it and now the check gauges light won't quit flashing, and the temperature gauge jumps to high

Assuming that your vehicle is not actually overheating, this leads me to believe that the replacement temperature sensor is faulty or incorrectly installed. It could also be a poor electrical connection at the temperature sensor. An open circuit would cause...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.