Error Code PE
Pressure Sensor Error — water level sensor circuit fault
Moderate
Address soon - your appliance may not work properly
What This Means
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
How to Fix
- 1
Is PE displayed? Yes — check if pressure sensor connector is disconnected: Yes — reconnect or repair connector
- 2
No — measure pressure sensor resistance (pins 1 to 3); should be 21–23 Ω ±10%: out of range — replace pressure switch
- 3
No — is air chamber and pressure tube clogged? Yes — clear foreign material from air chamber and tube
- 4
No — replace main PCB assembly
This Error Applies To
LG WT7900H Series Washers (2019) (2019–present)
Related Error Codes
Outlet/Drain Error — machine cannot drain within expected time
Overflow Error — water level too high
Inlet Error — water not filling within expected time
Door/Lid Error — lid not detected as closed or locked
Door Lock Error — lid fails to lock
Thermistor/Temperature Sensor Error — temperature sensor circuit fault
Locked Motor Error — motor cannot rotate or hall sensor failure
Motor Overload / Foreign Object Error — wash plate obstructed