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.

 


    • 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

    2004 jeep liberty front ...

    I replaced my front drive shaft again and took it for test drive and it snapped again. Started ...

    2001 Tahoe Sounds Like A ...

    Just bought a 01 Tahoe seemed to run quiet at first then after a while when u first start it it ...

    Help for push button start

    How do you install a relay for a push button start.Answer: If you are installing an aftermarket ...

    mustang dash light

    Ford mustang dashboard lights won't work .Answer: If you mean the backlighting of the dash and ...

    1988 ford bronco not getting ...

    Replaced both fuel pumps and fuel pressure regulator. Not getting fuel to fuel rail. I found the ...

    Log In Or Register
    ? The Benefits

    How Things Work

    Charging System Components and Operation

    On today's newer cars and trucks, the generator (ALternator) provides DC voltage to operate the vehicle's electrical system and to charge the battery. A magnetic field is created when current flows through the rotor windings. The rotor is belt driven by the engine creating an AC voltage as this field rotates within the stator windings.

    Read more...

    Common Engine Codes

    Evaporative Emissions Leak Code P0440 - P0455

    P0440 - P0455
    The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED .

    Read more...