Hi everyone. I have the old style boiler, basically last year it started not working after being on for 10 mins.. Replaced the pump and 3 way port valve cleared the lines, bled everything, cleaned it all out Etc. Literally done most things. Basically it will work bit o my if I manually position the 3 port valve with the actual valve control taken off. It doesn't seem to change between heating and hot water. Is this a programmer issue or a pcb issue sitting th boiler, it can't be much else, surely. Thanks for any help in advance. I gave up last year and spent the whole winter with the Emerson on, paying for it now.