Dimplex DCF7850 Service Manual page 17

PROBLEM
Heater
Heater is not turning off
Heater is not turning on, but
flame effect is still functioning
Heater is turning off after a
couple of minutes of operation
Heater emits an odor
Heater fan turns on but heater
lacks heat
Heating element is glowing red
Heater fan runs continuously
Noise
Excessive noise with the heater
on
Grinding or excessive noise with
the heater off
CAUSE
Improper operation
Defective Heater On/Off Switch
Defective Thermostat
Defective Remote Control Receiver
Improper operation
Loose Wiring
Defective Heater On/Off switch
Defective Thermostat
Defective Heater assembly
Build up of dirt/dust in heater assembly
Defective Heater Assembly
Normal Operation
Defective Heater Assembly
Improper operation
Loose wiring
Defective Heater Assembly
Normal Operation
Defective Heater Assembly
Loose wiring
Defective heater on/off switch
Defective thermostat
Defective heater assembly
Dirty blower assembly
Defective blower assembly
Moving flicker rod hitting or rubbing
against internal components
Defective flicker motor
SOLUTION
Refer to Operation Section
Replace Heater On/Off Switch
Replace Thermostat
Replace Remote Control Receiver
Refer to Operation Section
Trace wiring in unit
Replace Heater On/Off switch
Replace Thermostat
Replace Heater assembly
Ensure that exterior intake louvers and firebox 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
Refer to Operation Section
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 cutout, unplug unit, discontinue use and
replace heater assembly.
Trace wiring in unit
Replace heater on/off switch
Replace thermostat
Replace heater assembly
Clean blower assembly
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
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