Why Your Car's Radiator Fan is Acting CRAZY (And How to Fix It!)

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hey Gearheads and car owners ever
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wondered why your radiator fan seems to
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be running when it shouldn't today we're
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diving deep into a problem that could
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save you thousands in potential engine
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damage quick by the end of this video
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you'll know exactly what's causing those
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weird fan behaviors and how to diagnose
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them like a pro
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mechanic section one understanding
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radiator fans first up let's break down
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the three main types of radiator fans
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one mechanical fans driven by your
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engine's serpentine belt two electric
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fans controlled by your car's computer
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three hydraulic fans using fluid
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coupling for variable speeds Pro tip a
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healthy fan should only run when your
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engine needs cooling so if it's running
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when the engine's cold Houston we've got
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a problem section two top reasons for
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abnormal fan behavior let's investigate
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The Usual Suspects faulty temperature
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sensors broken engine control modules
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stuck thermostat coolant leaks
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mechanical fan clutch failure have you
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ever experienced weird fan Behavior drop
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a comment below and let me know section
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three diagnostic stepbystep diagnosis is
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key here's how the pros do it one scan
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for Diagnostic trouble codes two check
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sensor resistance three monitor sensor
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voltages four pressure test cooling
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system five inspect fan control circuits
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section four repairs and solutions once
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you found the problem here's how to fix
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it replace faulty sensors repair SL
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reprogram CCM replace thermostat fix
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coolant leaks service radiator before we
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wrap up smash that like button if this
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video saved you from potential engine
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trouble want the ultimate cooling system
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maintenance guide check the link in the
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description for our complete diagnostic
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checklist conclusion remember a healthy
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cooling system means a Happy Engine stay
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cool Drive smart and we'll catch you in
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the next video don't forget like
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subscribe and hit that notification Bell

Why Your Car's Radiator Fan is Acting CRAZY (And How to Fix It!)

yourmotorcare.com

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Why Your Car's Radiator Fan is Acting CRAZY (And How to Fix It!)

yourmotorcare.com