Dimplex BLF7451 Service Manual page 16

PROBLEM
Heater
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
Heater fan turns On but
heater lacks heat
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
16
CAUSE
Improper operation
Loose wiring
Defective display/control board
Defective Heating Element
Improper operation
Build up of dirt/dust in Heater
Assembly
Defective Heating Element
Normal Operation
Defective Heating Element
Improper operation
Loose wiring
Defective Heating Element
Normal Operation
Defective Heating Element
Loose wiring
Defective switchboard
Defective Blower/Fan
Dirty Heater Assembly
Defective Blower/Fan
Flicker rod hitting or rubbing
against internal components
Defective Flicker Motor
SOLUTION
Refer to Operation Section
Trace wiring in unit
Replace the display/control board
Replace Heating Element
Refer to Operation Section
Ensure that exterior intake louvers and
firebox cavity are free of dirt/dust.
Replace Heating Element
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 Heating Element
Refer to Operation Section
Trace wiring in unit
Replace Heating Element
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 the heat-
ing element
Trace wiring in unit
Replace the switchboard assembly
Replace Blower/Fan
Ensure that exterior intake louvers and
firebox cavity are free of dirt/dust.
Replace Blower/Fan
Ensure rod is straight and mounted properly
in the bracket, spinning freely away from
other components. Replace if necessary.
Replace Flicker Motor
PART NUMBER
3001640100RP
2200510700RP
2200510700RP
2200510700RP
2200510700RP
2200510700RP
3001520100RP
5300160300RP
5300160300RP
2000220100RP
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