This guide explains how to access and use the test mode on your LG WT7800CW washer to perform basic diagnostic checks.
LG Top-Load Washer Test Mode: A Guide for the WT7800CW and Similar Models
Important Note: Before starting the test mode, ensure the washing machine is empty.
How to Access the Test Mode on Your LG WT7800CW Washer:
- Turn off the washing machine but leave it plugged into the power outlet (standby mode).
- Press the Power button. Then, hold down the Temp and Soil buttons for 5 seconds
- Press the Start/Pause button to advance through the test steps.
Understanding the Display:
The following table summarizes what happens at each step in test mode and what the display indicates:
| Button Presses | Display Status | Description |
|---|---|---|
| None | t1 | Main program version |
| 1 Time | t2 | Displays program version |
| 2 Times | t3 | No action |
| 3 Times | Water Level 1 (268-233) | The detergent inlet valve activates with cold water |
| 4 Times | Water Level 2 (268-233) | The detergent inlet valve activates with hot water |
| 5 Times | Water Level 3 (268-233) | The softener inlet valve activates |
| 6 Times | Water Level 4 (268-233) | The jet spray inlet valve activates with cold water |
| 7 Times | Water Level 5 (268-233) | The bleach inlet valve activates with cold water |
| 8 Times | t4 | Heater check (on heater models) and load sensing coefficient |
| 9 Times | Water Level (268-233) | Drain pump and agitator (pulsator) activate |
| 10 Times | t7 | Load sensing coefficient check |
| 11 Times | t8 RPM | Agitator (tub) check: displays RPM |
| 12 Times | t9 RPM | Spin check: displays RPM |
| 13 Times | – | The washer turns off, unlocks door, and all LEDs turn off |
Understanding Water Level Display:
- Decreasing numbers indicate the pressure switch is sensing water filling the drum.
- Increasing numbers indicate the pressure switch is sensing water draining from the machine.
Understanding Motor RPMs:
- Tumble: 2-digit display (40–65 range); motor speed is 40–65 RPM.
- Low Speed Spin: 2-digit display (40–65 range); motor speed is 400–650 RPM.
- High Speed Spin: 3-digit display (100–150 range); motor speed is 1000–1500 RPM.
Understanding Temperature:
- Thermistor and Heater tests (on applicable models) display temperature in °C (degrees Celsius).
Exiting Test Mode:
Simply press the Power button to exit test mode.
Compatible LG Washing Machines:
This test mode applies to the following LG front-load washer models:
- WT7000CW, WT7005CW, WT7060CV, WT7060CW, WT7100CW, WT7150CW, WT7150CM, and WT7250CW
- WT7300CW, WT7300CV, WT7305CW, WT7305CV, WT7400CV, WT7400CW, WT7405CV, WT7405CW, and WT7480CL
- WT7800CW, WT7800CV, WT7880HWA, WT7900HBA, WT7900HWA, WT8400CW, and WT8405CW
Conclusion
The test mode on your LG WT7800CW washer empowers you to perform basic diagnostics. By following this guide, you can assess components like water valves, the drain pump, motor, and temperature sensor.
For more advanced troubleshooting:
- If you encounter issues beyond the scope of test mode, consult the LG service manual for additional troubleshooting steps.
- You can also explore the LG washer error code resource for further guidance: [LG Washer Error Codes].
