Name: LG WM4000HWA
Brand: LG

Question 1

What does error code dE1 mean on LG WM4000HWA?

Accepted Answer

Door Open Error (Type 1). Cause: Door not completely closed; Loose electrical connections at door switch and PWB assembly; Door switch assembly out of order; Spring of latch hook not actuating.

Question 2

What does error code dE2 mean on LG WM4000HWA?

Accepted Answer

Door Open Error (Type 2). Cause: Door not completely closed; Loose electrical connections at door switch and PWB assembly; Door switch assembly out of order.

Question 3

What does error code EE mean on LG WM4000HWA?

Accepted Answer

EEPROM Error. Cause: EEPROM is out of order.

Question 4

What does error code FE mean on LG WM4000HWA?

Accepted Answer

Overflow Error. Cause: Water is overflowing (water level frequency over 21.3 kHz); Air chamber or tube clogged; Inlet valve opening continuously when power not applied (stuck open).

Question 5

What does error code IE mean on LG WM4000HWA?

Accepted Answer

Water Inlet Error. Cause: Correct water level (24.6 kHz) not reached within 8 minutes after water is supplied; Preset water level not reached within 20 minutes; Air chamber or tube has holes or clogs; Filter inlet valve clogged with foreign material; Drain hose not installed between minimum 24" and maximum 96" above bottom of washer; Inlet valve connectors broken or loose; Resistance of inlet valve assembly out of range (not 0.8-1.2 kΩ); Inlet valve connector CN551 disconnected from Main PWB; Incorrect electrical connection / damaged main harness; Pressure switch faulty.

Question 6

What does error code LE mean on LG WM4000HWA?

Accepted Answer

Locked Motor Error. Cause: Motor harness connector (3-pin, male, white) not connected to stator assembly connector (3-pin, female, white); Bad or unstable electrical contact at 4-pin motor harness connector and 4-pin Main PWB female connector; Motor harness between stator assembly and Main PWB cut (open circuit); Rotor magnet cracked; Stator winding resistance out of range (not 5–15 Ω between U-V, V-W, W-V).

Question 7

What does error code nE mean on LG WM4000HWA?

Accepted Answer

Wi-Fi Communication Error (LQC Test Mode only). Cause: Problem with connection between display PCB and Wi-Fi module.

Question 8

What does error code nF mean on LG WM4000HWA?

Accepted Answer

Wi-Fi Module Error (LQC Test Mode only). Cause: Problem with Wi-Fi module itself.

Question 9

What does error code OE mean on LG WM4000HWA?

Accepted Answer

Drain Error. Cause: Not fully drained within 10 minutes; Kinked or clogged drain hose; Frozen drain hose; Foreign objects clogging drain pump filter; Foreign objects caught in pump impeller; Loose or disconnected connectors at main PCB and drain pump; Water level frequency above 250 (air dome/pressure hose clogged); Drain pump motor resistance out of range; Main PWB not supplying 120 VAC ±5% to drain pump connector NA4-1,4.

Question 10

What does error code PE mean on LG WM4000HWA?

Accepted Answer

Pressure Sensor Error. Cause: Pressure sensor assembly out of order; Water level frequency consistently below 10 kHz or over 30 kHz; Connector to pressure sensor disconnected or disassembled; Pressure sensor resistance out of range (pin 1 to pin 3: not 21–23 Ω ±10%); Air chamber and tube clogged.

WM4000HWA

Error Codes

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Code	Meaning	Severity
dE1	Door Open Error (Type 1)	Moderate
dE2	Door Open Error (Type 2)	Moderate
EE	EEPROM Error	Moderate
FE	Overflow Error	Moderate
IE	Water Inlet Error	Moderate
LE	Locked Motor Error	Moderate
nE	Wi-Fi Communication Error (LQC Test Mode only)	Moderate
nF	Wi-Fi Module Error (LQC Test Mode only)	Moderate