tE4
LG Washing Machine
Severity: ModerateWhat Does This Error Mean?
The tE4 error means LG's washer cannot read the drum heater temperature correctly. The thermistor — the sensor that monitors heat — has failed or lost its connection. Heated wash cycles will not run until this is resolved.
Affected Models
- WM3900HWA
- WM4000HWA
- WM3500CW
- LG front-load washers with TurboWash or steam heating
Common Causes
- Failed drum heater thermistor — the sensor has drifted outside its normal resistance range
- Loose or broken wiring connector between the thermistor and the main control board
- Heater assembly damaged from mineral scale buildup due to hard water
- Main control board fault causing incorrect sensor readings
- Moisture or water ingress corroding the sensor connector pins
How to Fix It
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Run a cold water cycle to confirm the washer still works without heating.
If it completes normally, the issue is specifically with the heating circuit — which helps narrow it down for a technician.
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Unplug the washer for 10 minutes, then plug back in.
A hard reset can clear temporary sensor faults caused by voltage spikes or brief connection losses.
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Run LG's Tub Clean cycle with a washing machine cleaner tablet.
Mineral scale from hard water builds up on the heater and can cause sensor errors. A cleaning cycle helps remove deposits.
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If the tE4 code returns, check the wiring harness behind the drum.
Only do this if you are comfortable with appliance repair. Look for loose connectors or corroded pins near the heater assembly.
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Schedule a certified LG technician if the error persists after reset and cleaning.
Provide the technician your model number and the exact error code. LG's tech line is 1-800-243-0000.
When to Call a Professional
If a reset and cleaning cycle do not clear tE4, the thermistor or heater assembly needs replacing. This involves partial disassembly of the machine. Contact LG support or a licensed appliance technician. Typical repair cost is $100–$250 including parts and labor.
Frequently Asked Questions
Can I still wash clothes when the LG washer shows tE4?
Yes — select a cold water cycle and the machine should run normally. The tE4 error blocks heated wash cycles only. This works as a temporary workaround while you arrange a repair.
Is tE4 covered under LG's warranty?
LG offers a 1-year parts and labor warranty on most washing machines. If your washer is within warranty, contact LG at 1-800-243-0000 to schedule a free repair. Keep your purchase receipt handy.
What is the difference between tE, tE2, tE3, and tE4 on LG washers?
Each tE code refers to a different temperature sensor in the machine. tE is the main wash water sensor. tE2 is a secondary thermistor. tE3 and tE4 relate to the drum and steam heater sensors respectively. The number helps the technician identify exactly which part to replace.