Water level sensor quit working so that water in tub never stopped filling. Only looks like there is a plastic tube that hooks to tub and up to the water level switch. The tube looks fine and so I ordered and installed a new water level switch from your company. Works fine now except it will still occasionally not recognize the extra small setting and fills to a small level especially on initial wash after it has been not used for awhile or occasionally on the rinse cycle. Is there another part I'm not seeing or do I need to calibrate the new switch in some way when I installed it? Please help.