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LG•ThinQ Dishwasher

Analysis by Lukas & Team

LG ThinQ Dishwasher tE Thermistor Error Troubleshooting

Fix the tE error on your LG ThinQ Dishwasher. Diagnose thermistor faults & ensure optimal performance. Expert guide for Canadian homeowners.

Frequently Asked Questions

•How do I find the LG service manual for my dishwasher model?

The LG service manual is typically available for purchase online, or through authorized LG service providers. Search online using the model number of your dishwasher and 'service manual'.

•What is the typical resistance range for a dishwasher thermistor?

The resistance range varies depending on the specific thermistor and model. Consult the service manual for your specific dishwasher to determine the correct range at a given temperature. It is typically a few kilo-ohms at room temperature (25°C).

•Can a faulty heating element cause a 'tE' error?

While a 'tE' error specifically points to a thermistor issue, a malfunctioning heating element can indirectly cause it. If the heating element is not functioning correctly, the thermistor might report an abnormal temperature, potentially triggering the error. It is best to test the thermistor and element independently.

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About Lukas & Team

Lukas leads the technical research department at Digital Home Faults. Together with a team of systems analysts, he specializes in translating complex manufacturer error codes into actionable diagnostic steps for the Canadian market.

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Solution:

1

Disconnect power to the dishwasher at the breaker panel (ensure proper lockout/tagout procedures are followed). Verify voltage is zero with a multimeter.
2

Locate the thermistor, typically near the heating element or in the sump area. Consult the LG service manual for exact location.
3

Inspect the wiring harness and connector for damage, corrosion, or loose connections. Repair or replace as needed.
4

Use a multimeter to measure the thermistor's resistance at room temperature. Compare the reading to the expected value specified in the LG service manual. Replace the thermistor if it's outside the acceptable range.
5

If wiring and thermistor check out, inspect the control board for signs of damage (burnt components, corrosion). Replace the control board if necessary.
6

After replacing any components, reconnect power and run a diagnostic cycle to verify the 'tE' error is resolved.
7

Ensure the dishwasher is running the latest firmware version. Initiate an OTA update via the ThinQ app if one is available.

Possible Causes:

Thermistor failure (open or short circuit).
Wiring harness damage or loose connection between the thermistor and the control board.
Corrosion on the thermistor terminals due to high humidity (common in Canadian winters with indoor drying).
Control board malfunction, specifically the analog-to-digital converter (ADC) circuit.
Software/firmware bug causing misinterpretation of thermistor readings.
Incorrect thermistor calibration data within the firmware.

Technical Overview:

The 'tE' error indicates a fault in the thermistor circuit, responsible for monitoring water temperature. The thermistor is typically a Negative Temperature Coefficient (NTC) resistor; its resistance decreases with increasing temperature. The control board reads the analog voltage drop across this resistor to infer water temperature. Communication with the main control board occurs via I2C or SPI protocol. OTA firmware updates can impact thermistor calibration tables.

Pro Tip:

If the tE error appears intermittently, suspect a loose connection or hairline fracture in the thermistor wiring. Gently wiggle the wires near the connector while monitoring the thermistor resistance with a multimeter to identify the fault location.

Preventative Care:

Periodically inspect wiring harnesses and connectors for signs of corrosion or damage.
Ensure proper ventilation in the dishwasher area to minimize humidity.
Keep the dishwasher's software up to date with the latest firmware releases.
Avoid overloading the dishwasher, which can strain the heating element and thermistor.
Check water hardness and use appropriate dishwasher detergent to prevent mineral buildup on the thermistor.