Name: LG WT7900HBA
Brand: LG

Question 1

What does error code dE mean on LG WT7900HBA?

Accepted Answer

Door/Lid Error — lid not detected as closed or locked. Cause: Doorlock switch sensing failure; Lid magnet misaligned or missing; Faulty doorlock switch; Faulty PCBA.

Question 2

What does error code dL mean on LG WT7900HBA?

Accepted Answer

Door Lock Error — lid fails to lock. Cause: Doorlock switch not attempting to lock (mechanical failure); Lid out of balance or misaligned preventing lock engagement.

Question 3

What does error code FE mean on LG WT7900HBA?

Accepted Answer

Overflow Error — water level too high. Cause: Inlet valve not closing (valve energized when it should be off); Pressure sensor / air chamber malfunction; Faulty PCBA.

Question 4

What does error code IE mean on LG WT7900HBA?

Accepted Answer

Inlet Error — water not filling within expected time. Cause: Water tap closed or water supply off; Inlet valve filter clogged with foreign material; Connector to valve or RD6 on PCBA disconnected or faulty; Inlet valve resistance out of range (should be 0.8–1.2 kΩ); Faulty PCBA.

Question 5

What does error code LE mean on LG WT7900HBA?

Accepted Answer

Locked Motor Error — motor cannot rotate or hall sensor failure. Cause: Motor hall sensor connector or motor drive connector (GY3 or BL3) disconnected; Rotor magnet cracked or damaged; Stator winding resistance out of range (should be 5–15 Ω each phase: U-V, V-W, W-V); Faulty PCBA (IPM module).

Question 6

What does error code LE1 mean on LG WT7900HBA?

Accepted Answer

Motor Overload / Foreign Object Error — wash plate obstructed. Cause: Foreign objects (coins, pins, clips, etc.) caught between wash plate and inner basket.

Question 7

What does error code OE mean on LG WT7900HBA?

Accepted Answer

Outlet/Drain Error — machine cannot drain within expected time. Cause: Drain pump connector disconnected or pump disassembled; Pump connector or connection connector faulty on PCBA; Drain hose kinked, clogged, frozen, or positioned too low; Pump coil resistance out of range (should be 1.5–4 Ω); Air chamber or pressure tube clogged (water level frequency below 26.0 kHz in service mode); Faulty PCBA.

Question 8

What does error code PE mean on LG WT7900HBA?

Accepted Answer

Pressure Sensor Error — water level sensor circuit fault. Cause: Pressure sensor connector (BL6) disconnected; Pressure sensor resistance out of range (should be 21–23 Ω ±10% pin 1 to pin 3); Air chamber or pressure tube clogged with foreign material; Faulty PCBA.

Question 9

What does error code tE mean on LG WT7900HBA?

Accepted Answer

Thermistor/Temperature Sensor Error — temperature sensor circuit fault. Cause: Thermistor connector at PCBA (YL2) disconnected or faulty; Broken wire between PCB and thermistor; Faulty thermistor.

Question 10

What does error code UE mean on LG WT7900HBA?

Accepted Answer

Unbalance Error — load is unbalanced during spin. Cause: Laundry loaded unevenly on one side of drum; Washer installed on unlevel or sloped floor.

WT7900HBA

Error Codes

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Code	Meaning	Severity
dE	Door/Lid Error — lid not detected as closed or locked	Moderate
dL	Door Lock Error — lid fails to lock	Moderate
FE	Overflow Error — water level too high	Moderate
IE	Inlet Error — water not filling within expected time	Moderate
LE	Locked Motor Error — motor cannot rotate or hall sensor failure	Moderate
LE1	Motor Overload / Foreign Object Error — wash plate obstructed	Moderate
OE	Outlet/Drain Error — machine cannot drain within expected time	Moderate
PE	Pressure Sensor Error — water level sensor circuit fault	Moderate