Top cover needs to be removed. 2 screws at the back and then pull the cover back. Then remove side cover on the left side (As you look from the front) A couple of screws vertically and one inside the top (to loosen a retaining bar) The float is inside a white plasic box at the bottom. You need to unclip the wires and lever 2 small retaining clips on the box and then it will slide out. Plastic float and box can then be cleaned.
Tom Smith
May 2011