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Eric, Automotive Repair Shop Manager
Category: Mercury
Satisfied Customers: 29728
Experience:  20+ yrs. experience as repair shop manager and technician.
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2003 Mercury Grand MArquis GS blower fan problem. I do not

Customer Question

2003 Mercury Grand MArquis GS blower fan problem. I do not have climate control. Just a speed switch. Changed switch with brand new, also changes fan motor with brand new. Blower only works on high speed. No low or med. What can I look for? Thanks Brian
Submitted: 7 years ago.
Category: Mercury
Expert:  Eric replied 7 years ago.



Most likely the blower motor resistor is bad if you only have high speed on the blower.


It is located on the hvac box under the hood, mostly hidden from view by the heater hoses:



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