Fault analysis: The change of water level and re-filling are achieved by operating the cam of the pressure switch, forcing the pressure switch contacts to open. There are two main causes for this fault:
(1) The water level adjustment knob is damaged, which prevents it from rotating the selection shaft of the pressure switch.
(2) The selection shaft connected to the pressure switch cam is damaged.
Edited and organized by the Beijing Sanyo Washing Machine Repair Center.
Sanyo Washing Machine: Unable to change water level and re-fill
Fault inspection: Upon checking, the water level adjustment knob was found to be intact. After removing the pressure switch and disassembling it for inspection, it was discovered that the cam was damaged, preventing it from changing gears through the control shaft, leading to the inability to change the water level and re-fill. After replacing the cam, the machine was tested, and the washing machine's water level change and re-filling functions returned to normal, resolving the fault.