LG Washer: Hot Metal Smell During Sanitize Cycle... | digitalhomefaults.org

Technical Background:

LG washers utilize a direct-drive motor system (inverter motor) controlled by a main PCB. The sanitize cycle employs a heating element to raise water temperature. Communication between the temperature sensor (thermistor), heating element relay, and the motor controller is crucial. The system relies on feedback loops to regulate temperature and motor speed. The rotor position sensor uses Hall effect sensors. Incorrect current in the motor or element can cause heat.

Symptoms:

Observation of a distinct metallic odour emanating from the LG washer drum area, specifically during or immediately following the sanitize cycle. No visible smoke or sparks detected. Error code displayed may include OE (drainage issue) or LE (motor issue), but the fault may occur without a logged error in the unit's diagnostic logs or the LG ThinQ app.

Possible Causes:

Heating element malfunction (short circuit or insulation breakdown) causing excessive heat.
Motor overload due to unbalanced load or bearing failure, causing overheating of the motor windings.
Foreign object (e.g., small metal item) lodged within the drum assembly, rubbing against the drum during high-speed cycles.
Wiring harness chafing or insulation damage, causing a short circuit.
Control board relay failure, causing continuous power to the heating element.
Thermistor calibration drift causing the control board to misread the water temperature and run the heating element longer than required.

Solution:

1

Disconnect the washer from the electrical supply at the breaker panel (lockout/tagout procedure). Verify absence of voltage with a multimeter.
2

Inspect the drum for any foreign objects (coins, pins, etc.). Remove any obstructions.
3

Check the heating element for continuity and resistance using a multimeter. The resistance should be within the manufacturer's specifications. Replace if faulty.
4

Inspect the wiring harness for any signs of chafing or damage. Repair or replace as needed.
5

Examine the motor for signs of overheating or bearing failure. Check the motor windings for continuity. Replace if necessary. The rotor position sensor can fail, but is harder to test without specialized tools.
6

Test the thermistor using a multimeter. Compare the resistance reading with the manufacturer's temperature/resistance chart. Replace if out of range.
7

If all components test within specifications, suspect a control board malfunction. Replace the control board.

Safety Warning:

Disconnect power at the breaker before any inspection. High voltage is present in the washer. Verify the machine is properly grounded. If unsure, consult a qualified appliance repair technician. Do not operate the washer if you smell burning plastic. Unplug the washer from the wall.

Prevention:

- Regularly inspect the drum for foreign objects before each wash cycle. - Avoid overloading the washer. - Use appropriate detergent amounts. - Clean the lint filter after each load. - Perform a drum clean cycle with a washing machine cleaner every month. - Check water inlet hoses for leaks and replace them every 5 years.

Expert Tip:

If the smell only occurs during the sanitize cycle, run a normal wash cycle with cold water. If the smell is not present, the heating element is the likely cause. Check the wire connections behind the machine to the outlet.

Frequently Asked Questions

•How do I safely disconnect power to my LG washer?

Locate the circuit breaker in your electrical panel labelled for the laundry room or washing machine. Switch the breaker to the OFF position. Verify no power with a multimeter.

•What is the correct resistance range for my LG washer's heating element?

Refer to the LG service manual specific to your washer model for the correct resistance value. A typical range is 10-20 ohms. If you don't have it, search the model number online.

•Where can I find replacement parts for my LG washer in Canada?

Authorized LG parts distributors in Canada include Reliable Parts and Marcone Appliance Parts. You can also order directly from LG's Canadian website.

LG Washer: Hot Metal Smell During Sanitize Cycle Diagnosis

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

Frequently Asked Questions

•How do I safely disconnect power to my LG washer?

•What is the correct resistance range for my LG washer's heating element?

•Where can I find replacement parts for my LG washer in Canada?

Related Questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: