Follow each step carefully.
Press the 'Power' button for 3 seconds to turn off the device.
Identify the water level sensor, usually found near the bottom of the tank.
Unplug the wiring harness connected to the water level sensor.
Use a Phillips screwdriver to remove the screws securing the sensor.
Gently pull the sensor out from its mounting position.
Check for any blockages or damages and replace any faulty components.
Insert the repaired sensor back into its mounting position and secure it with screws.
Plug the wiring harness back into the water level sensor.