LG ThinQ App: Troubleshooting Incorrect Cycle Time... | appliancefaults.com

Technical Background:

The LG ThinQ app communicates with the appliance's Main Control Unit (MCU) via Wi-Fi. The MCU receives data from various sensors (moisture, temperature, etc.) to determine the cycle's progress and calculates the remaining time. This data is then transmitted to LG's servers and displayed in the app. Voltage paths to the MCU and sensors must be stable and within specified tolerances for accurate operation.

Symptoms:

The LG ThinQ app displays an incorrect cycle time remaining for a wash, dry, or other appliance cycle. The actual cycle time is significantly different than what the app reports. The cycle may be complete, but the app still shows time remaining, or vice-versa.

Possible Causes:

Communication issues between the appliance and the LG server.
Faulty moisture sensor or temperature sensor reporting incorrect data.
MCU (Main Control Unit) software glitch or corruption.
Inconsistent Wi-Fi signal strength affecting data transmission.
Defective UI (User Interface) board not updating cycle time properly.
Power fluctuations causing erratic MCU behavior.

Solution:

1

Unplug the appliance from the outlet or switch off the breaker in the breaker panel.
2

Inspect the wiring connections to the UI board and the MCU for any loose connections or corrosion. Use a 1/4-inch nut driver to tighten any loose screws.
3

Check the moisture sensor and temperature sensor using a multimeter. Resistance values should be within the manufacturer's specified range. Replace if faulty.
4

Power cycle the appliance by leaving it unplugged for 5 minutes, then plug it back in.
5

Check your home Wi-Fi signal strength near the appliance. Consider moving the router or adding a Wi-Fi extender.
6

If the problem persists, attempt a software reset on the appliance through the service menu (if available). Refer to the service manual for instructions.
7

If all else fails, the MCU may need to be replaced or reprogrammed. Contact a qualified technician for this service.

Safety Warning:

Always disconnect power to the appliance before performing any troubleshooting or repairs. Follow Lock Out/Tag Out (LOTO) procedures. High voltage components are present inside the appliance.

Prevention:

Ensure a stable Wi-Fi connection. Protect the appliance from power surges using a surge protector. Clean the moisture sensor regularly to prevent buildup of residue.

Expert Tip:

Many LG appliances have a hidden service mode that allows you to run diagnostics and reset the MCU. The sequence to enter service mode varies by model, but often involves pressing a specific combination of buttons on the control panel. Refer to the service manual for the correct sequence for your model. For example, pressing 'Temp Control' + 'Spin Speed' simultaneously for 3 seconds might work on some models.

Frequently Asked Questions

•How do I access the service menu on my specific LG ThinQ model?

The service menu access varies greatly between models. The most reliable way to find the correct sequence is to consult the service manual, readily available online for most LG appliances by searching with your model number. Alternatively, search online appliance repair forums using your model number.

•What are the typical resistance values for the moisture sensor?

Typical resistance values for moisture sensors vary. You need the technical sheet for your exact model. However, a common range is between 5k ohms (dry) and 50k ohms (wet). The key is to observe if the resistance changes when moisture is applied to the sensor.

•How do I determine if my MCU is faulty?

Determining a faulty MCU requires advanced troubleshooting skills. If all other components (sensors, wiring, UI board) have been tested and are functioning correctly, and the issue persists, the MCU is the most likely culprit. However, confirming this often requires specialized diagnostic equipment and may be best left to a qualified technician.

LG ThinQ App: Troubleshooting Incorrect Cycle Time Display

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the service menu on my specific LG ThinQ model?

•What are the typical resistance values for the moisture sensor?

•How do I determine if my MCU is faulty?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: