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ac controls

TC4x4

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Sep 12, 2006
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Location
Michigan
Why would the 1,2,3 settings for the fan speed of the ac in my 99 mercury cougar stop working all of a sudden? It only blows on the highest speed.
 
If it were a Toyota...

There may be a fan speed resistor. They use a resistor to vary the speeds, typically you'd lose the lower speeds one at a time though not all at once.
 
the BLOWER MOTOR RESISTOR is your answer...just replaced one on my girlfriends ranger....it's prolly a dealer only item...and her biatchin' finally made me go pay the 30minutes for it....it's either under the dash by the glove box or just outside on the firewall.
 

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