The flow rate meter detects the incoming water rate and sends a signal to the module which will then decide how long it needs to open the inlet valve for .
If the appliance is filling/draining/filling/draining before it actually starts washing then its 99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure its the flow rate meter thats faulty . Common prob as the flow meter doesn’t send a pulse to the control module so it doesn’t know how fast the water’s flowing in.
You may get the ‘check water’ light come up….
Part number 424099