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.

 


Be Social With Us !

Leave your comments

Post comment as a guest

0
    • 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

    2002 Chevy Camaro Ignition ...

    2002 CHEVY CAMARO LS1 AUTO.Question: 2002 CAMARO, INSTALLED NEW TURN SIGNAL CAM, THERE WAS A LOT OF ...

    1997 Malibu Engine Ticking ...

    1997 2.4 Chevy Malibu has a loud ticking sound when at idle or high rpm cold or hot. Replaced the ...

    Brake Pedal Goes to The Floor ...

    4.3 Vortec 1989 Chevy s-10. Question Here. Give as much detail as possible. : I'm stumped...no ...

    2002 Oldsmobile Alero Fog ...

    2002 Oldsmobile Alero Repairs for this problem = checked the fuse.Question = the fog lights on the ...

    How Things Work

    Electronic Throttle Control System Operation

    The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:

    • Accelerator pedal position sensing

    • Throttle positioning to meet driver and engine demands

    Read more...

    Common Engine Codes

    EGR Codes P0400 - P0405

    P0400-P0405
    The powertrain control module (PCM) tests the exhaust gas recirculation (EGR) system during deceleration by momentarily commanding the EGR valve to open while monitoring the manifold absolute pressure (MAP) sensor signal. When the EGR valve is opened, the PCM should see a proportional increase in MAP.

    Read more...