DLEX3900W tE1 error
Your LG DLEX3900W is showing tE1. Before replacing parts, confirm the model tag matches DLEX3900W: Check the door frame, inside the door opening, or the rear panel near the exhaust. On this LG dryer, tE1 means Thermistor error — the dryer cannot read incoming air temperature. The steps below follow the field-service order for the DLEX3900W platform — not the generic LG tE1 page. Cross-check part fit with DLEX3900W before ordering — use the model-specific parts diagram. If the code cleared after a reset but returned mid-cycle, treat that as a confirmed fault rather than a one-time glitch.
Parts for this repair
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Fix steps
- Verify the model tag reads DLEX3900W — Check the door frame, inside the door opening, or the rear panel near the exhaust.
- Reset tE1: unplug the dryer or switch off the breaker for 5 minutes, then restore power.
- Clean the lint screen, inspect the exhaust hose and exterior vent hood, and confirm electric dryers have both legs of 240V power for tE1.
- Cross-check part fit with DLEX3900W before ordering — use the model-specific parts diagram.
- Run a test cycle after repair. If the code returns, use the compatible parts below or the full brand code guide.
Professional assistance recommended
This issue may be unsafe for DIY repair. Follow the safety guidance above and contact a qualified technician.
Repair guidance is for informational purposes only. We do not guarantee that any fix will resolve your issue, and you assume all risk when following these steps. Terms & disclaimer
FAQ
What does tE1 mean on a LG DLEX3900W?
Thermistor error — the dryer cannot read incoming air temperature.
How do I reset tE1 on a DLEX3900W?
Unplug the dryer or switch it off at the breaker for 5 minutes, then restore power and restart. If tE1 returns on the DLEX3900W, the underlying fault is still present.
What part do I need for DLEX3900W tE1?
Try the reset and troubleshooting steps first. tE1 on the DLEX3900W is not always a failed part.
Is tE1 on the DLEX3900W easy to fix?
Many owners fix this themselves with basic tools. Start with the reset and steps above, then check compatible parts below.