Temperature sensor
Common error-code part. Confirm resistance and connector style.
PE on an LG washer means the pressure sensor — the component that measures how much water is in the drum — has malfunctioned. Before replacing the sensor, check the thin pressure hose that connects it to the drum. Detergent residue clogs it frequently, and cleaning it takes five minutes.
What This Error Means
The pressure sensor connects to the drum via a small rubber hose. Air pressure in the hose changes as the water level rises. When the sensor reading is out of range or erratic, PE appears.
Common Causes
- Clogged pressure hose — Detergent residue blocks the thin hose over time. Very common.
- Loose hose connection — Hose came off the sensor or drum nipple
- Failed pressure sensor — Sensor membrane or electronics failed
- Overfilling or underfilling — PE can accompany water level errors
Step-by-Step Fix
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Unplug the machine. Remove the top panel (usually two screws at the back).
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Find and inspect the pressure hose. A thin rubber hose runs from the outer drum to the pressure sensor. Disconnect it at both ends. Hold it to the light — if blocked, you can’t see through it. Blow through it firmly.
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Clean or replace the hose. Rinse under the faucet, push a thin brush through if blocked. Replace if stiff or cracked.
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Reconnect firmly at both the drum nipple and sensor inlet. Both connections should feel snug.
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Test the sensor if hose is clean. Blow gently into the sensor — it should click as pressure changes. A sensor that doesn’t respond to pressure has failed.
Parts You May Need
When to Call a Technician
The pressure sensor is accessible after removing the top panel. Replacement is a simple swap. If you’re not sure which part has failed, an appliance tech can confirm in one visit.