0:00
hey Gearheads and car owners ever
0:01
wondered why your radiator fan seems to
0:03
be running when it shouldn't today we're
0:05
diving deep into a problem that could
0:07
save you thousands in potential engine
0:09
damage quick by the end of this video
0:11
you'll know exactly what's causing those
0:13
weird fan behaviors and how to diagnose
0:21
mechanic section one understanding
0:23
radiator fans first up let's break down
0:26
the three main types of radiator fans
0:28
one mechanical fans driven by your
0:30
engine's serpentine belt two electric
0:33
fans controlled by your car's computer
0:35
three hydraulic fans using fluid
0:37
coupling for variable speeds Pro tip a
0:40
healthy fan should only run when your
0:42
engine needs cooling so if it's running
0:44
when the engine's cold Houston we've got
0:46
a problem section two top reasons for
0:48
abnormal fan behavior let's investigate
0:50
The Usual Suspects faulty temperature
0:53
sensors broken engine control modules
0:56
stuck thermostat coolant leaks
0:59
mechanical fan clutch failure have you
1:01
ever experienced weird fan Behavior drop
1:03
a comment below and let me know section
1:05
three diagnostic stepbystep diagnosis is
1:09
key here's how the pros do it one scan
1:11
for Diagnostic trouble codes two check
1:14
sensor resistance three monitor sensor
1:16
voltages four pressure test cooling
1:18
system five inspect fan control circuits
1:21
section four repairs and solutions once
1:24
you found the problem here's how to fix
1:26
it replace faulty sensors repair SL
1:29
reprogram CCM replace thermostat fix
1:33
coolant leaks service radiator before we
1:36
wrap up smash that like button if this
1:38
video saved you from potential engine
1:40
trouble want the ultimate cooling system
1:42
maintenance guide check the link in the
1:43
description for our complete diagnostic
1:45
checklist conclusion remember a healthy
1:48
cooling system means a Happy Engine stay
1:50
cool Drive smart and we'll catch you in
1:52
the next video don't forget like
1:55
subscribe and hit that notification Bell
