First check the water switch. The water level switch air duct from the laundry tub Interface pulled into the pipe blowing, action should hear the sound of the water level switch, but the water without having any impact. To further examination, found the water level switch, and put it with the programmable wiring board is disconnected. Electrical barrier resistance measured with a multimeter across the switch is infinite. Mouth to blow air duct, the resistance becomes zero (indicating the switch is turned on). This shows that the water level switch is good, check the water level switch in parallel with ceramic capacitor C13 (0.01μF). If the measured resistance across C13 is about 150Ω, indicating that the capacitor has been damaged and replaced with the specifications of a good capacitor, the fault disappears.Ci2service manual download site