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DS3311, DS4411, 409896, DS2205, DS2307
TROUBLESHOOTING GUIDE
HEATER
Problem
Heater is not
turning off
Heater is not
turning on
Heater emits an
odour
Heater fan turns on
but heater lacks
heat
Heating element is
glowing red
Cause
Defective heater on/off switch
Improper operation
Loose wiring
Defective heater on/off switch
Defective heater assembly
Improper operation
Loose wiring
Normal operation
Defective heater assembly
Loose wiring
Improper operation
Defective thermostat
Loose wiring
Defective heater assembly
Normal operation
Defective heater assembly
Solution
Replace heater on/off switch
See User's Guide
Trace wiring in unit
Replace heater on/off switch
Replace heater assembly
See User's Guide
Trace wiring in unit
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.
Replace heater assembly
Trace wiring in unit
See User's Guide
Replace thermostat
Trace wiring in unit
Replace heater assembly
Small glowing sections of
the element are considered
normal.
If larger glowing sections are
causing the heater to trip the
thermal cut out, unplug unit,
discontinue use and replace
heater assembly
Service Manual
Reference
Page 8
Page 4
Page 8
Page 10
Page 4
Page 10
Page 4
Page 9
Page 4
Page 10
Page 10
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