Heat & Air Switch makes grind noise

Asked by Feb 21, 2014 at 08:08 PM about the 2003 Mercury Grand Marquis GS

Question type: Maintenance & Repair

2003 Mercury Grand Marquis Heat/Air Switch makes grinding noise when turned on.
Replaced Blower Motor but have same noise. Any help or suggestions?

1 Answer

I replaced the new Blower Motor with the old original one after installing the "squirrel cage" and still had the grinding noise. Next I pulled the blower motor out and temporarily installed the new blower motor without the squirrel cage. Had wife crank car and turn blower motor on while I held it in my hand with it attached electrically to the proper wiring plug.There was no grinding noise. Returned new blower motor for refund and purchased a new squirrel cage. Installed new squirrel cage on old blower motor. Success at last. The grinding noise is gone. Special Note: The old squirrel cage had a barely visible hairline crack on each side of the hole where you mount it on the blower motor shaft. My conclusion is that when we cranked the car on a morning when we experienced the extreme cold weather recently the squirrel cage developed the hairline cracks due to it being made out of hard plastic material.

Your Answer

Add photo

Related Questions

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,260
#2 kbro
kbro
Reputation 2,050
#3 Js08016
Js08016
Reputation 1,660
View All

Related Models For Sale

Used Ford Crown Victoria
8 Great Deals out of 972 listings starting at $2,990
Used Lincoln Town Car
31 Great Deals out of 1,818 listings starting at $1,650
Used Chevrolet Impala
589 Great Deals out of 29,008 listings starting at $1,300
Used Mercury Marauder
30 listings starting at $10,000
Used Ford Taurus
203 Great Deals out of 19,353 listings starting at $500
Used Chevrolet Tahoe
630 Great Deals out of 27,855 listings starting at $600
Used Cadillac DeVille
9 Great Deals out of 1,587 listings starting at $1,995
Used Honda Accord
718 Great Deals out of 83,067 listings starting at $500
Used Ford F-150
2,431 Great Deals out of 211,451 listings starting at $895
Used Ford Mustang
326 Great Deals out of 45,933 listings starting at $2,000

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
44 listings starting at $3,995
2007 Mercury Grand Marquis GS For Sale
47 listings starting at $3,500