LG Washer PE Error Code — Water Level Sensor Fix
The LG PE error code stands for Pressure sensor Error — the water level pressure switch is not sending correct signals to the control board. Before replacing the pressure switch itself, check the small rubber pressure hose that connects the switch to the tub. This hose is frequently the actual problem — a kink, disconnection, or blockage in the hose causes the switch to read incorrect levels and throw the PE code.
Try the AI Diagnosis ToolAI Repair Tools
Common Symptoms
- PE error code on the display
- Washer fills with too much water (overfill) or too little
- Cycle stops during fill phase
- Washer runs but doesn't fill to the correct level
- Overflow out of the drum
Most Likely Causes
- 1
Kinked or Disconnected Pressure Hose
A small rubber hose connects the water level switch to an air trap port on the tub. If this hose is kinked, cracked, disconnected, or clogged with debris, the switch receives no air pressure signal and can't measure water level. This is the most common cause of PE errors.
- 2
Clogged Pressure Hose
The narrow bore of the pressure hose can become clogged with soap residue or lint over time, blocking the air pressure signal from reaching the switch. Disconnecting and blowing through the hose will verify whether it's blocked.
- 3
Faulty Pressure Switch
The pressure switch itself can fail — the internal diaphragm can rupture or the electrical contacts can corrode. A multimeter can verify whether the switch is functioning at different pressure levels.
- 4
Control Board Fault
In rare cases, the main control board fails to read the signal from a fully functional pressure switch. This is a last-resort diagnosis after replacing the hose and switch.
Not sure if this is the right fix for your exact model?
Upload a photo of your appliance label — Fix-It Fast AI will identify your exact unit and tailor the diagnosis.
Quick DIY Checks
Unplug the washer before accessing internal components. When blowing through the pressure hose to test it, blow gently — excessive pressure can damage the switch diaphragm.
- 1Unplug the washer. Access the interior of the machine (for top-loaders: remove the control panel and tilt the cabinet; for front-loaders: remove the front panel). Locate the water level pressure switch — it's usually a round plastic disc mounted high on the cabinet side, with a thin rubber hose coming off the bottom.
- 2Inspect the pressure hose along its full length. Look for kinks, cracks, or disconnection at either end (the switch and the tub port). Reconnect any loose ends and straighten any kinks. Replace the hose if it's cracked.
- 3Blow through the pressure hose (disconnect it from the switch first) to verify it's clear. You should be able to blow air freely through it. If it feels blocked, use a thin wire or compressed air to clear the obstruction.
Get the full fix — Pro members get unlimited AI diagnoses
Save your repair history, get step-by-step AI guidance on any washer issue, and avoid $150+ service call fees.
Try Pro — $7.99/mo- 4Test the pressure switch with a multimeter: disconnect the electrical connector from the switch. With the hose connected to the switch, blow into the hose end and check for continuity change across the switch terminals. The switch should change state (open to closed or vice versa) as you apply pressure. A switch that doesn't change is faulty.
- 5If the hose is clear and the switch tests faulty, replace the pressure switch. If both are fine, take a photo of the control board and look for burned components or corroded solder joints before ordering a replacement board.
Save $150+ on a single service call
Less than a cup of coffee — fix it yourself with expert guidance.
- ✓ Step-by-step repair guides with exact part numbers
- ✓ Expert diagnosis in seconds — 500+ problems covered
- ✓ Full tool list & cost estimate before you spend a dime
$150+ service call vs. $7.99/mo · Cancel anytime
Repair vs Replace
PE errors are usually inexpensive to fix — a new pressure hose costs under $15 and a new switch costs $20–$50. The diagnosis is straightforward and within DIY capability. Only consider replacement if the control board is the cause and the machine is already over 10 years old.
Est. Repair Cost
$0 (hose reseating); $5–$15 (pressure hose); $20–$50 (pressure switch)
Est. Replacement Cost
$700–$1,500 for a new LG washer
Recommended Tools & Parts
- Buy on Amazon →
LG Washer Water Level Pressure Switch
Replacement pressure switch (water level sensor) for LG top-load or front-load washers. Verify with your model number — pressure rating varies by model.
$20–$50
- Buy on Amazon →
Pressure Switch Hose
Thin rubber hose connecting the water level switch to the tub air trap. Universal sizing — measure the inner diameter of your existing hose before ordering.
$5–$15
Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.
Still stuck? Let AI take a look.
Describe your problem or upload a photo — get a diagnosis in seconds.
Related Repairs
LG Washer OE Error Code — Drain Not Draining Fix
LG OE error means the washer can't drain. Clean the pump filter first — that clears this error in the majority of cases.
Read guide →LG Washer LE Error Code — Motor Locked Fix
LG LE error means the motor is locked or not responding. Often a reset clears it — if not, check the hall sensor or rotor.
Read guide →LG Washer IE Error Code — Water Inlet Fix
LG IE error means the washer isn't getting water. Check the supply valves and inlet screens before replacing the inlet valve.
Read guide →LG Washer UE Error Code — Unbalanced Load Fix
LG UE error means the load is unbalanced. Redistribute the laundry first — if it keeps happening, check the suspension springs and drum bearing.
Read guide →Save $150+ on a single service call
Less than a cup of coffee — fix it yourself with expert guidance.
- ✓ Step-by-step repair guides with exact part numbers
- ✓ Expert diagnosis in seconds — 500+ problems covered
- ✓ Full tool list & cost estimate before you spend a dime
$150+ service call vs. $7.99/mo · Cancel anytime
Still not sure what's wrong?
Get an AI diagnosis in seconds — describe the problem or upload a photo.
Get an AI Diagnosis⚡ Get step-by-step help for YOUR specific appliance
Our AI diagnoses your exact model — not just generic advice. Upload a photo or describe the issue and get a repair plan in seconds.
No account needed for diagnosis. Cancel Pro anytime.
Related Tools
Frequently Asked Questions
- Can a bad pressure switch cause my LG washer to overfill?
- Yes. If the pressure switch is stuck in the 'empty' position (not detecting water), the control board keeps the inlet valve open indefinitely, causing overfill. If you see water approaching the door seal or hear water sloshing above the normal level, stop the cycle immediately and unplug the washer. A stuck pressure switch or a disconnected pressure hose is the most common cause.
- How do I find the pressure switch on my LG washer?
- On LG top-loaders, the pressure switch is mounted on the inside of the control panel housing or on the upper side of the cabinet — trace the thin rubber hose from the tub to find it. On front-loaders, it's typically mounted on the rear wall of the cabinet interior. It looks like a small disc (1–2 inches diameter) with a rubber hose port on the side and an electrical connector on top.
- My LG washer PE error appeared after moving the machine — why?
- Moving the washer is a very common trigger for PE errors — the pressure hose frequently gets kinked or disconnected during the move, especially on machines being tilted or transported on their side. Open the machine and visually inspect the pressure hose first. In most post-move PE cases, reconnecting or straightening the hose is the entire fix.