found it! -h20 means minus water because its filling up too high and over fill sensor has cut it out. mine is down to pressure switch which is a ten minute easy fit. two screws at rear top, slide lid back then off pressure switch is at top on right. power off by plug out of socket, pull out cables refit pipe easy as that. we just got quoted £15 per month to get it fixed now and buy a year plan or £90 an hour just to look. the part is only a tenner too see http://tinyurl.com/2gocdy
billy, www.ringbilly.co.uk if your local to me as i work for myself doing upvc, March 2007
