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LG Washing Machine Error Code PE

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 10, 2026
⚠ Medium Severity 🔧🔧 Moderate DIY

Water level pressure sensor error

The most common cause of the PE error on a LG washing machine is pressure sensor failure (~55% of cases); start with: check pressure hose.

💰 DIY cost: $20–$55 👨‍🔧 Pro cost: $150–$280 Save $130+ by doing it yourself
LG Washing Machine error code PE on the display panel
How the PE code appears on a LG washing machine display

What Does Error Code PE Mean on a LG Washing Machine?

Water level pressure sensor error.

PE fires when the control board receives an out-of-range or non-changing signal from the water-level pressure sensor during fill. The sensor reads air pressure in a small hose connected to the tub, translating water height into a frequency the board monitors. If that signal is implausible or absent, the board halts filling to prevent overfill or dry running. Unlike FE (overflow) or IE (slow/no inlet water), PE points specifically to the sensing circuit rather than actual water flow.

Models affected: LG top-load and front-load washers using an analog water-level pressure sensor, including models such as the WM3900HWA, WM4000HBA, WM3400CW, WT7300CW, WM8100HVA, WM4500HBA, and WT7900HBA
What owners report: Owners commonly report PE appearing at the start of a cycle before much water enters, and a pinched, cracked, or slipped-off pressure hose is a frequent false trigger that mimics a dead sensor. Reseating the hose and clearing any kinks often clears it without buying parts.

What Causes Error Code PE?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Pressure sensor failure 55% of cases
  2. 2
    Pressure hose kinked or disconnected 30% of cases
  3. 3
    Control board pressure input failure 15% of cases

How to Fix LG Washing Machine Error Code PE

🔧🔧 Moderate DIY Est. time: 30–60 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Check pressure hose

    Locate the small hose running from the tub to the pressure sensor. Check for kinks or disconnection.

  2. 2

    Blow test the sensor

    Disconnect the hose from the sensor. Gently blow — you should hear audible clicks.

  3. 3

    Replace pressure sensor

    If sensor doesn't click, replace it.

    🔩 LG pressure sensor ($20–$55)

How to Reset Error Code PE

Unplug the washer for 60 seconds, then restart and let it fill. If PE returns during fill, recheck that the pressure hose is fully seated on the sensor and free of kinks before replacing parts.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full LG washer reset guide → Enter diagnostic mode →

Did this guide fix your appliance?

When to Call a Professional

If new sensor and clear hose don't resolve PE, the control board pressure input has failed.

Average professional repair cost for this issue: $150–$280

Related Error Codes

FE
Water overflow error — drum overfilling
⚠ High Severity
IE
Water inlet error — water not filling within expected time
⚠ Medium Severity

Same Code on Other Brands

Error code PE appears on these other brands too. See every brand that shows PE →

Samsung logo
Samsung Washing Machine PE
Water pressure sensor (pressure switch) failure

Find Replacement Parts

Use these links to find the exact replacement parts for your LG Washing Machine:

🔩
Search PartSelect
LG Washing Machine repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More LG Washing Machine Error Codes

OE Drainage error — water not draining within expected time UE Unbalanced load — cannot complete spin cycle LE Motor locked — hall sensor or stator fault dE Door open or door lock failure tCL Tub clean reminder — drum needs cleaning HE Heater error — water heater circuit fault

Frequently Asked Questions

Can I keep using my LG Washing Machine when error PE appears? +
You often can for a cycle or two, but the sensor issue behind PE will keep interrupting normal operation until it is fixed. Plan the repair rather than ignoring the code.
What most commonly causes PE on a LG Washing Machine? +
Across reported LG washing machine repairs, the most frequent is pressure sensor failure (55% of cases), pressure hose kinked or disconnected (30%), then control board pressure input failure (15%). Check them in that order before replacing any parts.
PE keeps coming back after a reset — what should I check next? +
A reset only clears the stored PE fault; if it returns, the sensor problem is still present. Move on to the physical checks — check pressure hose, then blow test the sensor — since the code will reappear until the root cause is resolved. This is a moderate job — a multimeter and some disassembly are usually involved.
How much does it cost to fix LG Washing Machine error PE? +
A DIY repair typically runs $20–$55 in parts, versus $150–$280 for a professional service call, so handling it yourself saves around $130. Expect the work to take roughly 30–60 minutes.
Which LG Washing Machine models show error PE? +
PE is documented on LG top-load and front-load washers using an analog water-level pressure sensor, including models such as the WM3900HWA, WM4000HBA, WM3400CW, WT7300CW, WM8100HVA, WM4500HBA, and WT7900HBA. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: June 10, 2026.

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