Service Manual

16 www.dimplex.com
PROBLEM CAUSE SOLUTION
Heater
Heater is not turning on, but ame
effect is still functioning
Improper operation Refer to Operation Section
Loose wiring Trace wiring in unit
Defective main control board Replace the main control board
Defective Heating Element Replace Heating Element
Heater is turning off after a couple
of minutes of operation
Improper operation Refer to Operation Section
Build up of dirt/dust in Heater Assembly Ensure that exterior intake louvers and rebox cavity
are free of dirt/dust.
Defective Blower/Fan Replace Blower/Fan
Defective Heating Element Replace Heating Element
Er1 appears on the display Wiring for Thermistor is loose Ensure Thermistor is securely plugged into the circuit
board
Defective Thermistor Replace Thermistor
Er2 appears on the display Build up of dirt/dust in Heater Assembly Ensure that exterior intake louvers and rebox cavity
are free of dirt/dust.
Defective Blower/Fan Replace Blower/Fan
Defective Heating Element Replace Heating Element
Heater emits an odor Normal Operation 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 dur-
ing manufacturing or operation.
Defective Heating Element Replace Heating Element
Heater fan turns On but heater
lacks heat
Improper operation Refer to Operation Section
Heater turned off too early If the heater is turned off before it has run for 2 min-
utes the fan will continue to run for 2 minutes to fully
cirulate air
Loose wiring Trace wiring in unit
Defective Heating Element Replace Heating Element
Heating element is glowing red Normal Operation Small glowing sections of the element are consid-
ered normal.
Defective Heating Element If larger glowing sections are causing the heater to
trip the thermal cutout, unplug unit, discontinue use
and replace the heating element
Heater fan runs continuously Loose wiring Trace wiring in unit
Defective main control board Replace the main control board
Defective Blower/Fan Replace Blower/Fan
Noise
Excessive noise with the heater on Dirty Heater Assembly Ensure that exterior intake louvers and rebox cavity
are free of dirt/dust.
Defective Blower/Fan Replace Blower/Fan
Grinding or excessive noise with
the heater off
Flicker rod hitting or rubbing against inter-
nal components
Ensure rod is straight and mounted properly in the
bracket, spinning freely away from other components.
Replace if necessary.
Defective Flicker Motor Replace Flicker Motor