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Ford Repair/2000 Mercury Marquis LS

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Expert: Dennis W - 10/11/2007


Question
The blower motor does not come on all the time. I have replaced two cooling fan relays. Could it be the temp. control module? I cannot find a fuse blown.

Answer
The cooling fan relay is for the radiator fan, not the blower. If you have automatic temp control, it could be the blower controller. If you have manual controls, it may be the blower resistor or switch.

And, if the blower only works on high, the resistor or controller is definitely the problem.

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Dennis W

Expertise

I am a retired Ford master tech specializing in electrical, climate control, emissions, driveability, chassis, brakes, and any light repairs. Currently employed by an independent shop that appreciates my knowledge and abilities. Cannot answer transmission or parts questions, these are not areas of my expertise.

Experience

37 years of auto repair, diagnosis, and emissions testing, in service staions, independent garages, and 20 years with Ford dealers.

Organizations
National Street Rod Association (NSRA)
International Automotive Technicians Network (IATN)
IAMAW (retired)
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Education/Credentials
Riverside City College Automotive technology program
Ford Master Tech Certified Engine and Chassis Master (Over 500 hours)
ASE Certified in 7 categories
6 years training in Union 76 Pro-tech program

Awards and Honors
4-time Technician of the Year at Almaden Lincoln Mercury
Ford Master Tech
Union 76 Pro-tech Master tech

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