Automatic Climate Control Whistle

Discussion in 'Heating & Cooling' started by Dayton Rich, Feb 3, 2018.

  1. Dayton Rich

    Dayton Rich New Member

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    Hi Guys, My first post.

    I have a 2008 Non EL EB with automatic climate control with an annoying issue. Once the system reaches the selected temp the climate control system produces a significant airflow whistle (sort of like a window opened just a crack). Once i the temp falls or rises, the whistle goes away. I am thinking it is a failing blend door actuator, however, before I tear into it I was hoping the experts here could confirm.

    Thanks ahead of time for the help!
     
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  2. 1955moose

    1955moose Full Access Members

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    Mine does that when I have one of the dash vents closed. Can you kinda crawl under there and narrow down location. You also might run the self diagnostic test, it may answer your question. Post your progress.

    Sent from my N9131 using Tapatalk
     
  3. deweysmith

    deweysmith Full Access Members

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    Mine does this! Sometimes the fan will be going a certain speed and it will suddenly start to squeal or whistle. I just turn the climate control off entirely, and then back on and it stops.
     
  4. Dayton Rich

    Dayton Rich New Member

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    How do you enter the self diagnostic mode for the climate control system?
     
  5. 1955moose

    1955moose Full Access Members

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    You press the off and floor button simultaneously, then within two seconds press the automatic button. That will put the system into diagnostics. Be sure inside of vehicle is between 40 and 90 degrees Fahrenheit, or readings are thrown off. This time of year that might be tough for you guys in Midwest, and east coast, with temps only hitting 40, at warmest part of day. Hopefully you have a garage to do test in. Post your findings!

    Sent from my N9131 using Tapatalk
     

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