AC blower clicking/clunking on levels 3 and 4 but not one and 2.

Tiny
LANE87
  • 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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Wednesday, May 16th, 2012 AT 11:03 PM

4 Replies

Tiny
DJCL
  • EXPERT
  • 786 POSTS

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

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Thursday, May 17th, 2012 AT 12:55 AM
Tiny
LANE87
  • MEMBER

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.

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Monday, May 21st, 2012 AT 6:06 PM
Tiny
CADIEMAN
  • MEMBER

Sounds like the cage is bad. It came apart

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Monday, May 21st, 2012 AT 6:28 PM
Tiny
DJCL
  • EXPERT
  • 786 POSTS

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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Monday, May 21st, 2012 AT 11:43 PM

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