Q: AC tapping noise when on recirculation.

asked by on November 04, 2016

I have had a recurring problem with A/C blower only working on four. I know that is due to a bad blower resistor and/ or cable. This problem goes back years. I push the buttons repeatedly or wiggle the cable and it temporarily fixes it for a few minutes or weeks. New problem is a loud tapping when a /c in recirculate mode. Takes about 5 seconds after engaging recirculation. I can put in recirc and change from dash outlet to lower heater or defrost or defrost combo and no tapping. When normal dash has to be in fresh air mode, otherwise tapping.

My car has 80000 miles.
My car has an automatic transmission.

Car is making a noise Inspection $79.99 - $89.99 Get a Quote

Hey there. The tapping noise you are hearing is most likely the air circulation door actuator. There is a separate actuator for the mode door position. The mode door directs the air out the various vents on your dash and the recirculation door opens and closes a door to fresh air from the outside of your car. The noise you are hearing is very common across all manufacturers. The internal gears of the actuator are broken at the end of its travel. Eventually, this will lead to a complete failure of the actuator. If you would like a precise diagnosis of this, a certified technician, like one from YourMechanic, can inspect the tapping noise in person and proceed with repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

My car coolant level goes down even external no leakage found. Second it mileage only 10 kmpl on high way with new spark plugs.

If you are losing coolant with no external leak then the head gasket is most likely leaking. The fuel mileage will suffer if you have coolant leaking in one of the cylinders. The brakes will vibrate once the rotors are...

Got new water pump less than 9 months ago. Now boiling sound and overheating smell. Temp says its good

Hello. The overheating issue your vehicle is having is likely not caused by the water pump once again. Though an inspection of your water pump performance should be checked when trying to diagnose this issue. The temperature gauge not going...

car leaking water

Hi, thanks for writing in about your BMW 750i. Water alone is not meant to handle the cooling of the engine. If only water is used in the cooling system, the water will boil off and become nothing because the...

Car shakes when stopped

There is a problem common for other vehicles of your year and model where a failing engine mount can cause the vehicle to seem to vibrate or shake and leave an audible sound in the cabin as well. Another option...

When I stop quickly then go to start the car hesitates then jolts forward

Hello, thank you for writing in. The first thing to consider is your driving habits. If you are consistently braking hard, it can be rough on your brake system and you transmission. The jolt is the biggest cause for concern....

When I have the clutch in and turn steering wheel there is a noise.

Hi and thanks for contacting YourMechanic. Check to see if the belt and tensioner is working and the belt has no cracks. If there are cracks in the belt, then replace the belt. If the belt seems to be loose...

ABS light is showing

This may be an issue of a faulty ABS control module or possibly faulty wheel sensors. This is a unit that controls the activation of the ABS system based upon inputs from the ABS wheel sensors. When this module is...

I just bought a 2006 Chrysler pacifica seems to have wiring issue and miles tripped over 100,000 miles.

For all of the electrical issues with your vehicle either there is a loose ground wire from the chassis to the frame or the ECM (computer) has malfunctioned and needs flashed or replaced. I recommend seeking out a professional, such...

I've been having trouble with my trans. In my 06 passat 2.0t 4c gas engine, it's shifting hard from 1st to 2ndwontshiftto5or6

In spite of the mileage, it may be repairable without rebuilding or replacing the transmission. I have a 2005 Jetta with the same transmission outside that experienced similar issues. Shifted hard on the 1-2 upshift and the 2-1 downshift. The...

Related articles

How to Calculate the Concentration of Coolant in a Car
A car cooling system works to transfer heat from the engine. Check antifreeze level and condition, and mix coolant with water to prevent overheating.
How to Replace an AC Pressure Switch
The AC pressure switch protects the AC system from pressure that's too high or low. Common signs of failure include a bad compressor or lack of AC.
How Long Does a Coolant Tube Last?
The The coolant tube, or hose, carries coolant to and from the engine in your vehicle. First, the coolant tube removes the hot coolant from the engine and brings it to the radiator which cools it down. The cooled fluid...