Clicking noise in heater

Asked by Nov 08, 2016 at 04:33 PM about the 1998 Ford Explorer 4 Dr XLT 4WD SUV

Question type: Maintenance & Repair

When I turned my heat on today there was
a clicking noise when I turn it off it quits
when I turned up heat and air it still worked
just fine

1 Answer

19,860

There is a broken cog on the blend door actuator gear. As the small motor turns to adjust the blend door, the gear meets the broken cog and you hear the click. Once two or more cogs break, the door will no longer be adjustable. On later models (2003 I know of) the entire dash has to come out of the vehicle to replace the part which is about 50 bucks. It's a plastic motor about the size of a cigarette pack. Check the net for the repair procedure for your particular model - 1998. It may be positioned in a location easier to get to.

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