Dimplex DFR2551G Service Manual page 13

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PROBLEM
Heater
Heater is not turning off
Heater is not turning on, but
flame effect is still function-
ing
Heater is turning off after a
couple of minutes of opera-
tion
Heater emits an odor
Heating element is glowing
red
Heater fan runs continu-
ously
Noise
Excessive noise with the
heater on
Grinding or excessive noise
with the heater off
CAUSE
Improper operation
Defective switchboard
Defective thermistor
Defective relay board
Defective display/control board
Improper operation
The ambient temperature around
the unit is too low (≤ 32°F/0°C)
Loose wiring
Defective switchboard
Defective heater assembly
Defective display/control board
Build up of dirt/dust in Heater
Assembly
Defective heater assembly
Normal Operation
Defective heater assembly
Normal Operation
Defective heater assembly
Defective Heater On/Off Switch
Dirty Heater Assembly
Defective heater assembly
Flicker rod hitting or rubbing
against internal components
Defective Flicker Motor
SOLUTION
Refer to Operation Section
Replace switchboard
Replace thermistor
Replace the relay board
Replace the display/control board
Refer to Operation Section
Allow the heater to run for 10-15 minutes to
allow the motor to heat up the enclosure and
begin to operate normally.
Trace wiring in unit
Replace switchboard
Replace heater assembly
Replace the display/control board
Ensure that exterior intake louvers and fire-
box cavity are free of dirt/dust.
Replace heater assembly
Normal operation is when the heater emits
an odor 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
Small glowing sections of the element are
considered normal.
If larger glowing sections are causing the
heater to trip the thermal cutout, unplug unit,
discontinue use and replace heater assembly.
Replace Heater On/Off Switch
Ensure that exterior intake louvers and fire-
box cavity are free of dirt/dust.
Replace heater assembly
Ensure rod is straight and mounted properly
in the bracket, spinning freely away from
other components. Replace if necessary.
Replace Flicker Motor
3001520100RP
3001560100RP
3001440100RP
Log 3001430100RP
Glass 3001430300RP
3001520100RP
2203690100RP
Log 3001430100RP
Glass 3001430300RP
2203690100RP
2203690100RP
2203690100RP
2203690100RP
2000500100RP
13

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