9-1-3. The Digital Tube display “F4”
Error message:Heater is abnormity .
Troubleshooting:
Cut off the power. check if the power
line is well and connected properly
Replace the power line
or
Connect the power wire properly
Connect the wire properly
Check if the wire connecting of the
PCB is disconnection
Check if the wire unit is good .
Check if the PCB is good.
SERVICE MANUL
Model No.HLTD500AGW
Issue
Rev.
- 29 -
N
Y
Y
N
Well
Replace the Back-up thermostat and
make sure wire is connected properly.
Broken
Replace the wire unit
N
Check if the wire connecting the
igniter
the gas valve and the wire
unit is loose
Connecting the wire properly
Check if the connecting the dryer to the
gas supply and the gas shut-off valve
is open, the gas supply accord with the
dryer’s requirements.
Connecting the dryer to the gas
supply, open the shut-off valve
insure the gas supply is well.
Replace the ignitor, insure the
exhaust system is well
Check if the wire connecting the radiant
sensor the hi-limit thermostat
the
cycling thermostat and the wire unit
Check if the radiant sensor
the
hi-limit thermostat
the cycling
thermostat is well.
Well: the resistance is 0
;
Broken: the resistance is infinite.
Replace the broken part.
Y
Check if the ignitor is well.
Well: the resistance is about
50
- 500
and not cracked;
Broken: the resistance is infinite
or cracked
Connecting the wire properly
Y
Well
N
Broken
Y
N
N
N
Broken
Check if the
gas valve
is good.
Well
Replace the Back-up thermostat and
make sure wire is connected properly.
Broken
