in the diagnosing section, if it is broken,
replace the PCBA.
Bearings on the
motor shaft are
worn and being
stuck.
Use a stick to stir the fan from the air inlet, if
the fan is not able to move, meaning the
bearings are stuck. Replace the duct
assembly.
Measure the resistance between any two of
the three cables of the motor by using a
multimeter.
If the resistance is infinite, replace the
motor
The switch is
not operable,
always keeps
ON. The blower
cannot be shut
off.
The switch contacts
are stuck inside.
Insert a good battery, if the blower will run
immediately regardless of the switch is on
or off , r
eplace switch assembly in the