LG DLGX4001B Service Manual

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NOTE: This test has two parts. The best test of the door switch system is done in the diagnostic mode. This
FUNCTIONAL TEST will test the door switch, wiring harness and PCB operation. If the results of this test are
normal, the door switch system and PCB response are normal. The problem is somewhere else.
FUNCTIONAL TEST (Control)
1. Enter the diagnostic mode. (See DIAGNOSTIC TEST MODE.)
2. With the door closed, press the START/PAUSE button once. The dryer will start tumbling without heat.
3. Open the door. The drum will stop tumbling. The “dE” error code should be displayed, the chime should sound seven times (if turned on), and
the drum light (if equipped) should come on. If the “dE” error code is not displayed or the light does not come on, proceed with the
MECHANICAL TEST below. If the error displays and light comes on, the door switch is working properly.
Test 5
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isY
X
Z
Y
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X
Z
Y
NO
NO
NO
YES
YES
YES
WH4
Disconnect the WH1 and BL3 connector
from the main PCB.
Measure the resistance between the
NA6- (GN) pin and a chassis
ground screw.
Is the resistance <1
?
Disconnect the BL2 and WH4 connector
from the main PCB.
Measure the resistance between
BL2- (WH) and WH4- (YL).
Is the resistance <1 with the
door closed and with the door
open?
*Skip this step if the dryer does not have
a drum light.
Disconnect the WH4 and the black tab
relay connectors from the main PCB.
Measure the resistance between
WH4- (YL) and WH4- (BK).
Is the resistance <1 with the door
opened and
with the door closed?
Refer to the individual door switch and light
bulb/socket component tests.
• Replace the main
PCB.
• Check all wiring
harness
connections wire
and ground
screws.
• Replace the light
bulb.
• Replace the light
socket.
[
[
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LG DLGX4001B Specifications

General

Type	front load; gas
Color	black steel; white (w), black steel (b)
Dryer Capactity	7.4 cu. ft.
Number of Cycles	12
Number of Options	12; more time, less time, damp dry signal, wrinkle care, control lock, wi-fi, energy saver, turbosteam™, reduce static, remote start, drum light, signal
Drying Levels	very dry, more dry, normal dry, less dry, damp dry
Venting	vented; electric: 4 way venting / gas: 3 way venting
Temperature Settings	high, med.high, medium, low, ultra low; 5
Control Panel	digital and knobs
Cycle Signal	yes
Interior Light	yes
Drying Rack	no
Sensor Dry Option	yes
Sanitize Option	yes
Steam	turbosteam™; yes
Smart Home	yes
Remote Control	yes
Wi-Fi	yes
Voltage	120 volts
Current	15

Weight and Dimensions

Depth	30 1/8 inch
Height	39 inch
Width	27 inch
Net Weight	139.3 lbs