LG Washer PE Error Code: Water Level Sensor Failure
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What Error Code PE Means
The PE error code means the water level pressure switch is not communicating correctly with the control board. The washer cannot determine how much water is in the tub, so it refuses to start or stops mid-cycle. The pressure switch uses a small air hose connected to the tub β as water rises, air pressure in the hose increases and the switch registers the level. A break anywhere in this system triggers the PE code.
Common Causes
Disconnected or cracked pressure hose
The small rubber tube connecting the outer tub to the pressure switch has slipped off a barb, developed a crack, or has a hole. Air escapes before reaching the switch, so it reads zero regardless of actual water level.
Clogged pressure hose
Detergent residue and mineral deposits build up inside the narrow hose over years, blocking airflow to the switch.
Failed pressure switch
The switch diaphragm is ruptured or the internal contacts are stuck. It cannot toggle between empty and full states.
Main control board fault
The board's input circuit for the pressure switch is damaged. The switch works but the board cannot read its signal.
How to Fix It
- 1
Reset the washer
Unplug the washer for 60 seconds. Plug it back in and run a cycle. If the PE code returns immediately, move to the next step.
Always unplug the washer before removing panels.
- 2
Access the pressure switch and hose
Unplug the washer. Remove the top panel by unscrewing the two or three Phillips screws at the rear edge and sliding the panel back. The pressure switch is a small round component mounted near the top-left or top-right of the frame, with a thin rubber tube running down to the outer tub.
- 3
Inspect the pressure hose
Check both ends of the rubber hose for a secure connection. Pull gently β a loose hose slips right off. Inspect the full length for cracks, holes, or kinks. Disconnect the hose and blow through it. You should hear a click from the pressure switch if the switch is good. If the hose is clogged, soak it in warm water and blow again to clear the debris.
- 4
Test the pressure switch
Disconnect the wire harness from the pressure switch. With the hose attached, blow into the hose while measuring continuity across the switch terminals with a multimeter. The switch should toggle between open and closed as you apply and release pressure. If it stays in one state, the switch is defective.
- 5
Replace the pressure switch or hose
A new pressure hose costs a few dollars. A new pressure switch runs $15-$40. Swap the faulty part, reconnect the wiring, and reassemble the top panel. Run a test cycle.
When to Call a Professional
Call a technician if the switch tests bad and you are unsure of the correct replacement part, or if the PE code persists after replacing the switch and hose (indicating a control board issue). TruePro's $59 diagnostic is credited toward the repair. All work is covered by a 90-day warranty on parts and labor. Same-day service is often available in LA County, Orange County, and Ventura County. Call 877-378-3111. New customers get 15% off labor with code NEW15.
Estimated Repair Cost
| Option | Estimated Cost |
|---|---|
| DIY (parts only) | $5 - $40 |
| Professional repair | $120 - $250 |
A pressure hose is under $10. The pressure switch costs $15-$40. Professional repair runs $120-$250 total including the diagnostic. TruePro's $59 diagnostic is credited toward the repair.
See full washer repair cost breakdown βLG Washer PE β FAQ
Related LG Error Codes
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