Service manual

BF5000NT, BF5000NT, EF2604, SF2603, DF2603
TROUBLESHOOTING GUIDE
HEATER
Problem Cause Solution
Service Manual
Reference
Heater is not
turning off
Defective heater on/off switch Replace heater on/off switch Page 14
Improper operation See User’s Guide
Loose wiring Trace wiring in unit Page 7
Heater is not
turning on
Defective heater on/off switch Replace heater on/off switch Page 14
Defective heater assembly Replace heater assembly Page 17
Improper operation See User’s Guide
Loose wiring Trace wiring in unit Page 7
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 during
manufacturing or operation.
Defective heater assembly Replace heater assembly Page 17
Loose wiring Trace wiring in unit Page 7
Heater fan turns on
but heater lacks
heat
Improper operation See User’s Guide
Defective thermostat Replace thermostat Page 15
Loose wiring Trace wiring in unit Page 7
Defective heater assembly Replace heater assembly Page 17
Heating element is
glowing red
Normal operation
Small glowing sections of
the element are considered
normal.
Defective heater assembly
If larger glowing sections are
causing the heater to trip the
thermal cut out, unplug unit,
discontinue use and replace
heater assembly
Page 17
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