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: Poor idling, hesitation on acceleration, and oil on spark plugs.

Hello. From what you describe, it would appear that your vehicle may be experiencing more than one issue. Oil on the spark plugs can be caused by a few different things. If you also found oil in the spark plug...

Q: Misfire

Hi there. From the description you have given, your vehicle has a combination of problems. The erratic tachometer/rpm gauge could be at fault. The tachometer signal from the ignition module could be erratic and may also be the cause of...

Q: I was driving my truck and it made this "poof" sound as if something blew. I lost everything--brakes, power steering, and it stalled

Hi, thanks for writing in. It is possible that the "poof" and exhaust smell (rotten gas smell?) both originated from the catalytic converter, and sulfur deposits in the converter. The engine may have backfired through the exhaust, setting off a...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.