Clicking noise in heater
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
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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