LG Dishwasher tE Error Code: Thermistor Fault Fix

What is the LG Dishwasher tE error?#

tE on an LG dishwasher is a thermal fault — the sump thermistor that reads water temperature is out of range, so the control cannot confirm the water is hot enough and stops the heated wash or dry. Dishes come out under-cleaned or unsanitized rather than the machine being dangerous. The first thing I check is whether the cycle is running very long or the sanitize light never comes on, because that is the control waiting on a temperature the failed sensor will never report.

tE on a LG Dishwasher: likely causes and repair cost#

On a LG Dishwasher, the tE code signals: thermal / thermistor error.

Typical professional repair: $140–$280 · Difficulty: hard · usually a technician job

Symptoms that often accompany tE: Water temperature not reaching set level; Cycle running excessively long; Dishes not sanitized (sanitize light not illuminating); Error appears during heated dry phase

Technician diagnostic sequence for tE:

1. Access the thermistor sensor — on LG dishwashers it is mounted in the tub sump area near the heating element
2. Disconnect the sensor and measure resistance — at room temperature (77F/25C) it should read approximately 10k ohms (NTC type)
3. Check the sensor wiring for corrosion or damage from exposure to moisture and detergent chemicals in the sump area
4. Verify the heating element is not shorted to ground — a leaking element can send false temperature signals through the chassis
5. If the sensor tests within spec, the main board analog input may be failed — this requires board replacement

Parts a technician may check or replace: Thermistor; Heating Element — if shorted; Main Control Board

Field note: Hard water scale can coat the thermistor probe and insulate it from the actual water temperature, causing a delayed or inaccurate reading. If tE appears intermittently and your area has hard water (Sacramento averages 16 grains), descale the sensor probe with white vinegar before replacing it.

How to troubleshoot the tE error yourself#

tE is mostly a diagnostic fault, so owner fixes are limited but worth understanding before a visit. Run the dishwasher and note whether it stalls in the heated-dry phase or the main wash — that tells the tech where to look. Make sure the incoming water is actually hot by running the kitchen tap first; a dishwasher fed lukewarm water can struggle to reach temperature and lengthen the cycle, though that alone should not post tE. Beyond that, the real fix is metering the sump thermistor and, if it reads wrong, replacing it — and occasionally the heating element or main board when the sensor checks out. That testing needs a meter and access to the sump, so tE is where I bring in a technician rather than guess at parts.

Is the LG Dishwasher tE error worth fixing?#

tE is usually worth repairing because the thermistor itself is inexpensive; the cost depends on what the testing reveals. A professional tE repair runs $140–$280, at the low end for a thermistor swap and toward the top if the heating element or control board is implicated. On a sound LG dishwasher that is an easy yes against a new machine. I only steer toward replacement when tE turns out to be a failed main board on an older unit and the quote approaches half the price of a new dishwasher — at that point the newer machine is the better value.

LG Dishwasher tE: frequently asked questions#

What does the tE error mean on a LG Dishwasher?#

tE is a thermal or thermistor error: the sensor that reads wash-water temperature is reading out of range, so the control cannot verify heat and halts the heated phase. Dishes may not sanitize.

Is it safe to keep using a LG Dishwasher that shows the tE error?#

Yes, it is safe — tE affects cleaning and drying performance, not safety. The worst outcome is dishes that are not properly sanitized until it is fixed.

Can I clear the tE error myself, or do I need a technician?#

You can confirm the incoming water is hot and note when the cycle stalls, but the real fix needs metering the thermistor. That diagnosis and part replacement is a technician job.

How much does it cost to repair the tE error on a LG Dishwasher?#

A professional tE repair typically runs $140–$280, at the low end for a thermistor and higher if the heating element or main board is involved.

Which parts usually fail when a dishwasher throws the tE code?#

The sump thermistor is the usual failure; less often the heating element (if shorted) or the main control board. The thermistor is the first and cheapest thing checked.

Is a LG Dishwasher with the tE error worth repairing?#

Yes, on a sound machine — a $140–$280 repair is well under a new dishwasher, especially for a simple thermistor. Only a board failure on an older unit tips toward replacing.

Why does sump thermistor reading out of range trigger the tE error?#

The thermistor converts water temperature into a resistance the control reads; when it drifts out of its band the control gets an impossible reading and posts tE. A shorted heating element can skew the same reading.