The HW is firing up, I have switched the dial to HW only, the temperature lights are say on 50 they go down to zero , there is a wheering sound as if the bioler is trying to fire, occcasional the fan fault slight flashes a few times then it fires and water get hot slowly, i tried this again this morning it took 4mins 32 secs for the boiler to fire from the time I turned the hot tap on.
changed mother board,diverter value.
Any ideas?
Mark, March 2008