14indy Posted August 17, 2015 Share Posted August 17, 2015 Our one owner 2008 MKS has developed a loud tapping somewhere under the dash that occurs every 1/2 second. It goes away for a minute or so then comes back. I believe it's about in the middle somewhere. Having the air on or off makes no difference. Quote Link to comment Share on other sites More sharing options...
YT90SC Posted September 15, 2015 Share Posted September 15, 2015 Blend door actuator. Pretty common issue. Quote Link to comment Share on other sites More sharing options...
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