Blower Motor Only Works on High on Mercury Monterey

Submitted by casey40510 · May 29, 2025
Published by RepairPal

Problem overview

The 2004-2007 Mercury Monterey with manual temperature and fan controls may have problems with the the blower motor only blowing air on certain settings. Most commonly the fan will only run on the highest setting. This is a well documented problem, and is caused by a failing blower motor resistor.

Correcting the problem is straight forward, and requires replacement of the small resistor. The resistor is normally found behind the glove box, next to the blower motor.

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