LG DLEX4370 Series Service Manual page 23

Not heating (Electric)
Check lint Filter
Clean if needed.
Explain to owner responsibility
formance and safety reason.
No
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?
No
outlet.
Check with meter at L1 and L2
On out let.
Correct voltage = 208~240Vac
±10%
Is voltage of outlet within correct
range?
3-1 Connection with a Power
Supply Cord
Yes
Check voltage of connector to
connector ( ~ . ~ )
CAUTION: Potential for voltages
over 200Vac. Proceed with care.
Heating = 208~240Vac
Stop = 0
Yes
-
Troubleshooting
for inadequate
Yes
End-user must
use correct outlet
No
or have outlet
repaired by
electrician.
Defective main
No
PCB
Unplug UNIT / Check heater
elements.
Terminal: 1(COM) – 2 = 10Ω
Terminal: 1(COM) – 3 = 10Ω
Terminal: 2 – 3 = 20Ω
Yes
Unplug UNIT / Test thermostats
Hi-limit
Open at 257 ± 9
(125 ± 5 ) ∞
Close at 221 ± 9
(94 ± 7 ) 5Ω
Safety
Open at 284 ± 41
(140 ± 5 ) ∞
Close at -31
(-35 ) 5Ω
Yes
Unplug UNIT / Check centrifugal
switch
Are motor readings normal?
Resistance value =
30mmΩ
Yes
Retest heating circuit
23
One or both
Heater elements
No
defective.
Defective
Thermostat. If
No
Safety thermostat
Is open, replace
Both after
Determining what
Caused thermo-
stat
to open
Defective Motor
No