Mechanics

AC BLOWER CLICKING/CLUNKING ON LEVELS 3 AND 4 BUT NOT ONE AND 2.

2003 Ford Expedition • 150,000 miles

This problem is slowing getting worse over the last few years. When using climate control (AC/Heater/Vent) the blower sounds like gears are stripped on level 4 (less efficient airflow and making a clicking clunking noise). More recently it began doing it on the level 3 setting. Clicking sound correlates with fan speed setting.

The rear unit also clunks but in a slow ~1hz pulsing sort of way where the air surges after each clunk. Any air flow setting = same clicking rate.

Is there a way to fix this without having to buy an entire blower?

Thank you!
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Lane87
May 16, 2012.




Remove the blower motor and see if something is in the wheel. Very often mice and. Rats get in there and make a nest

Djcl
May 17, 2012.
It wouldn't work on 1 and 2 speed if there were a rats nest in there. I need to know if the there are gears that can get stripped and if they are repairable rather than purchase a new blower unit.

Tiny
Lane87
May 21, 2012.
Sounds like the cage is bad. It came apart

Cadieman
May 21, 2012.
Verey offten somthing will get in the blower wheel assy and the first 3 speeds work fine bet hi makes noise. Don't replace the blower just remove it to inspect it. And there are no gears in there
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Djcl
May 21, 2012.

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