2006 Chevrolet Impala. Question: What could be the problem with a ticking noise coming from the dashboard. sounds like a machine gun. Ive heard that it could be an air duct flapping out of control. The ticking begins whenever i use my air or heat controls

 

Answer: Yes, this sounds like one of the heater / AC door motors is making the noise. There are several in the dash. There is a motor, also called an actuator, for the mode selection- defrost, floor or vent position. There is also one for the temperature door or doors if you have dual zone A/C. Then there would be one for each side. There is a also one for the blend door, which works in conjunction with the mode door.

Determining which one is noisy can be difficult. With a scan tool that can read HVAC data, you would be able to see the position of the door motors as a numeric value, then you could see the one that is moving around. Most people of course do not have this scanner, and only some of the higher end local shops would. The dealer definitely does. You could try switching positions on the control unit to floor, vent, defrost, hot cold, etc and try to pick out the one that is making the noise.


Leave your comments

Post comment as a guest

0

    Comments (2)
    Subscribe To These Comments-----   

    • Guest - Guest

      Will a/c work with one of the motors unplug

    • Guest - Mechanic Joe

      In reply to: Guest - Guest

      Yes, the A/C will work fine. With one of the motors unplugged, just that side will not function properly.

    Latest Articles

    Chevrolet Blazer Lost Power ...

    2000 blazer 4x4 lost power to drivetrain going down the ...

    Dodge Durango Timing Chain ...

    My 03 Dodge Durango 4.7L engine was blowing white smoke ...

    2002 Chevy Blazer Keeps ...

    My 2002 blazer keeps dying on me when I am driving, and ...

    1996 Lumina Dies Looses ...

    1996 Chevy Lumina 3.1 L. I have good fuel pressure,spark ...

    Silverado Won't Start Cold

    My 1992 Silverado 6 cylinder turns over but will not run if ...

    How Things Work

    Anti Lock Brakes -What Does The ABS Light Mean

    When wheel slip is detected during a brake application, the ABS enters antilock mode. During antilock braking, hydraulic pressure in each wheel hydraulic circuit is controlled to prevent a wheel from slipping. A separate hydraulic line and specific solenoid valves are used for each wheel. The ABS can decrease, hold, or increase hydraulic brake pressure to each wheel.

    Read more...

    Common Engine Codes

    Code P0101 or P0102 Mass Air flow Sensor

    The mass air flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. The powertrain control module (PCM) uses the MAF sensor signal in order to provide the correct fuel delivery for a wide range of engine speeds and loads. A small quantity of air entering the engine indicates deceleration or idle.

    Read more...