What Does Error Code tE1 Mean on an LG Washing Machine?
Unplug the washing machine, wait 10 minutes, then reconnect power and restart the cycle — this clears a temporary sensor glitch in many cases and takes about 5 minutes.
Fault description
The tE1 error code points to a fault in the main NTC thermistor, which is the component responsible for measuring water temperature inside the drum. When this sensor sends a reading that falls outside the acceptable range — either too high, too low, or no signal at all — the machine's control board flags tE1 and halts the programme to prevent overheating or a failed wash.
You may notice the machine stopping mid-cycle, refusing to start a wash, or displaying the code immediately after selecting a temperature-based programme. The drum may still turn briefly before the error appears, and in some cases the machine will attempt to restart before locking out entirely.
The fault affects models across several LG series including the F1056, F1068, and F1096 families. While the error sounds technical, the underlying cause is often straightforward and can be resolved without specialist tools in many situations.
Causes
- Faulty or failed NTC thermistor — The thermistor itself degrades over time, particularly after repeated heating cycles. A broken internal element or cracked housing causes the resistance reading to fall outside the expected range, triggering tE1.
- Loose or corroded thermistor wiring connector — The connector linking the thermistor to the main PCB can work loose due to vibration during spin cycles, or corrode from moisture exposure inside the machine. A poor connection produces an intermittent or absent signal that the control board interprets as a sensor error.
- Damaged wiring harness between thermistor and PCB — The wiring running from the sensor to the control board can chafe against the drum casing or other components over years of use. A partial break or short in the harness produces erratic resistance readings identical to a failed sensor.
- Main PCB fault — If the control board's thermistor input circuit is damaged — for example by a power surge — it may misread a perfectly healthy sensor. This is less common but should be considered if a new thermistor does not clear the fault.
- Temporary software or sensor glitch — Occasionally a brief voltage fluctuation or software hiccup causes the board to log a false tE1 reading. A full power reset is enough to clear this without any component replacement.
Step-by-Step Fix
- 1
Perform a full power reset
Switch the machine off at the programme dial, then unplug it from the wall socket. Leave it unplugged for at least 10 minutes to allow the control board to fully discharge. Plug back in, select a programme, and observe whether tE1 returns. This resolves the fault when the cause is a temporary glitch.
- 2
Check for error code confirmation
If tE1 reappears immediately or within the first few minutes of a new cycle, the fault is persistent and requires physical inspection. Note exactly when the code appears — at startup, during heating, or mid-cycle — as this helps narrow down the cause.
- 3
Locate and inspect the thermistor connector
Unplug the machine before doing anything further. Remove the rear panel (usually held by two or three screws along the top edge). The NTC thermistor is typically clipped into the lower rear of the outer drum tub. Trace the wiring to its connector on the main harness and check that it is firmly seated. Disconnect and reconnect it firmly, looking for any signs of corrosion or bent pins.
- 4
Inspect the wiring harness for visible damage
With the rear panel still off, follow the thermistor wiring along its route toward the PCB. Look for any sections where the insulation has worn through, melted, or been pinched. If you find damaged wiring, the affected section of harness will need to be replaced or repaired by a service technician, as live wiring repairs carry a safety risk.
- 5
Test the thermistor resistance with a multimeter
Disconnect the thermistor connector and set a multimeter to the resistance (Ohms) setting. At room temperature (around 20°C), a healthy LG NTC thermistor typically reads approximately 10,000–12,000 ohms. A reading of zero, infinite resistance, or a wildly different value confirms the sensor has failed and needs replacing.
- 6
Replace the NTC thermistor
If the multimeter confirms a failed sensor, fit a compatible replacement thermistor for your specific model number. The part clips or screws into the drum tub in the same position as the original. Reconnect the wiring, refit the rear panel, and run a short wash cycle to confirm the tE1 code has cleared.
- 7
Reassemble and run a test cycle
Once any repair or replacement is complete, refit all panels securely and plug the machine back in. Run a 40°C cotton cycle and monitor the display throughout. If tE1 does not reappear and the machine completes the cycle normally, the fault is resolved.
Affected models
Select your model to see its full troubleshooting page.
When to call a service technician
Contact a service technician if tE1 persists after you have replaced the thermistor with a confirmed compatible part and checked all wiring connections. This points to a fault on the main PCB itself, which requires specialist diagnostic equipment and soldering skills to repair or replace safely.
You should also call a technician if you find damaged wiring inside the machine, or if you are not comfortable working around electrical components. Any repair involving the main control board, live wiring, or internal drum components carries a risk of electric shock or further damage if handled incorrectly.
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Frequently Asked Questions
Can I still use my LG washing machine with a tE1 error?
It is not advisable. When tE1 is active, the machine cannot monitor water temperature accurately, which means it may overheat the water or fail to reach the correct temperature for the selected programme. Most LG machines will stop the cycle automatically to prevent damage, so continued use is unlikely to be possible anyway until the fault is cleared.
How do I know if the thermistor is the problem and not the PCB?
The most reliable way is to test the thermistor with a multimeter as described in step 5. If the resistance reading is within the expected range (roughly 10,000–12,000 ohms at room temperature), the sensor is healthy and the PCB input circuit is the more likely culprit. If the reading is open circuit or zero, replace the thermistor first before considering the PCB.
How long does it take to replace an LG washing machine thermistor?
For most LG front-loader models, replacing the thermistor takes around 30 to 45 minutes once you have the correct part. The main time is spent removing the rear panel and locating the sensor on the drum tub. The swap itself is straightforward — the sensor clips or screws into place and the connector is a simple push-fit.
Will tE1 come back after I replace the thermistor?
If the replacement part is the correct specification for your model and the wiring harness is undamaged, the fault should not return. If tE1 reappears shortly after fitting a new thermistor, inspect the wiring connector carefully for corrosion or a poor contact, and consider whether a PCB fault may be misreading the new sensor.
Is tE1 the same as tE2 or tE3 on LG washing machines?
No. On LG washing machines, tE1 specifically relates to the main NTC thermistor reading being out of range. tE2 and tE3 refer to faults with other temperature-sensing components or heating circuit elements. The diagnostic steps and replacement parts differ between these codes, so it is worth confirming the exact code displayed before ordering any parts.