my washing machine is filling cold clean water on its own even if the main switch is off. when i spin the water drains out but it again start filling very slowly. otherwise its functioning and there is no leakage of water on the floor.the model number is hotpoint WM53P

xyz, March 2009

could be the cold/hot inlet solenoid rubber not seating, a bit of rubbish has come through the supply pipe at the instant the valve needed to close.or a split rubber washer.(replacement valve will be needed)
you need to isolate the valves one at a time to see which is not seating,cold will fill machine quicker than hot due to the greater water pressure.
check if machine is plumbed to the u bend back siphoning maybe occurring(ignore if stand pipe fitted)
Question !
Why aren't you using your isolation taps/valves H/C this what they are fitted for after the washing has FINISHED.

wirecutterman, March 2009