LG DLEX4370 Series, Service Manual

Page: 26 / 60

26
Check lint Filter
Clean if needed.
Explain to owner responsibility to
and safety reason.
Run dryer on a heat cycle for
one minute.
If heat is felt, unit may have a
vent problem, Investigate venting
system.
Is vent too long?
Fully or partially clogged, etc?
Check voltage of connector to
connector
CAUTION: Potential for voltages
over 100Vac. Proceed with care.
Igniting = 120Vac ± 10%
Stop = 0
Unplug UNIT /
Check the gas valve nozzle
clogged.
Unplug UNIT / Check gas valve
Valve1 terminal >
1.5kΩ~2.5kΩ
Valve2 terminal >
1.5kΩ~2.5kΩ
Unplug UNIT / Check Igniter
Resistance value = 50~800Ω
Unplug UNIT /
Open at 370 (Maximum)
∞
Close at 320
1Ω
Unplug UNIT / Test thermostats
Hi-limit
Open at 203 ± 41
(95 ± 5 ) ∞
Close at 158 ± 41
(70 ± 5 5Ω
Safety
Open at 230 ± 41
(110 ± 5 ) ∞
Close – Manual reset
Retest heating circuit
Defective gas
valve
Defective Igniter
Defective Flame
detector.
Defective
Thermostat. If
Safety thermostat
Is open, replace
Both after
Determining what
Caused thermo-
stat
to open
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Troubleshooting
for inadequate
Defective main
PCB
Remove foreign
body.
Not heating (Gas)