My series 80 top load washing machine is filling very slowly in cold water settings

Check the cold water supply at the water inlet valve. Remove the supply hose and check that the small screen in the inlet valve is not clogged with rust or debris. The water inlet valve solenoids can be tested using a multimeter or ohmmeter. Check for continuity. A lack of continuity indicates a faulty solenoid and the water inlet valve will need to be replaced. I am attaching a photo for reference. Hope this helped and best wishes.