KDS6401E
TROUBLESHOOTING GUIDE
HEATER
Problem
Cause
Solution
Service Manual
Reference
Heater is not
turning off
Defective heater on/off switch
Replace heater on/off switch
Page 11
Improper operation
See Operation Section
Page 2
Loose wiring
Trace wiring in unit
Page 7
Heater is not
turning on
Defective heater On/Off
switch
Replace heater On/Off
switch
Page 11
Defective heater assembly
Replace heater assembly
Page 14
Improper operation
See Operation Section
Page 2
Loose wiring
Trace wiring in unit
Page 7
Heater emits an
odour
Normal operation
Normal operation is when
the heater emits an odour for
a brief period after the
heater is initially turned on.
The heater is burning off any
dust accumulated during
manufacturing or operation.
Defective heater assembly
Replace heater assembly
Page 14
Loose wiring
Trace wiring in unit
Page 7
Heater fan turns on
but heater lacks
heat
Improper operation
See Operation Section
Page 2
Defective thermostat
Replace thermostat
Page 12
Loose wiring
Trace wiring in unit
Page 7
Defective heater assembly
Replace heater assembly
Page 14
Heating element is
glowing red
Normal operation
Small glowing sections of
the element are considered
normal.
Defective heater assembly
If larger glowing sections are
causing the heater to trip the
thermal cut out, unplug unit,
discontinue use and replace
heater assembly
Page 14
17