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TROUBLE SHOOTING
Part/
Test
System
Timer
Check if the green light is lit,
and if you can hear the timer
ticking
Thermostat
Set the temperature at 80 °C
and check if the heating
element is getting warm
(Check input power approx.
1425 W)
The green light should be lit
and the orange light should
switch off after it reaches
80 °C
Motor fan
Set the timer and listen if the
assy
motor is running
Heating
Check if the heating element
element
is getting warm
(Check input power approx.
1425 W)
Thermal fuse Set the timer and check if
the green light is lit
HD9220/20 /21 /22 /23 /24
Possible deviation
The green light is not lit
but the timer is ticking
The green light is lit but
the timer is not ticking
Both green and orange
light are lit but there is no
heating
If the green light is lit and
the orange light is off
If both the green and
orange light are off
The orange light does not
switch off after reaching
approx. 80 °C
Motor is not running
If the Orange light is on
and the heating element
does not heat
If the heating element
does not heat and the
orange light is off
Green light is not lit
Analyses
Check the timer-switch and the
fuse with a multimeter
Timer is defective
Check the heating element with
a multimeter
Check the thermostat with a
multimeter
Check the timer and fuse with a
multimeter
Thermostat is defective
The fan is scraping the housing
turning it by hand (Switch off the
power when you do this test!)
The fan is not scraping the
housing turning it by hand
(Switch off the power when you
do this test!):
Check the motor fan assy, timer
and fuse with a multi meter
Check the heating element with
a multimeter
Check the timer, fuse and
thermostat with a multimeter
Check the timer and fuse with a
multimeter
Replace
(depending of
the analyses
outcome)
Timer/Fuse
Timer
Heating element
Thermostat
Timer/Fuse
Thermostat
Motor fan assy
Motor fan assy /
Timer/Fuse
Heating element
Timer/Fuse/
Thermostat
Timer/Fuse
3-10
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