Question about 1986 Mercury Marquis
Sounds like you need to replace blower motor speed cotroller, located underhood right rear of engine on A/C / Heater case on firewall, rectangular in shape. When fan stops working tap on controller, fan should come back on then you will know that is problem. Have seen this many times on this vehicle. Hope this helps, have a good one!
Posted on Jul 26, 2009
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Posted on Jan 02, 2017
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