im not there now whats best possible cause.the pin on the diverter vavle moves up and down i would say its working correctly i can here it working turn tap off heating comes on. is it the board ,gas vavle or not coming to full flame
ariiston euro combi . model sx 20 m ff1 ce .hot water not getting hot. changed diaphram in diverter vavle . descaled calliferer.is problem thermostate. heating working fine .flow rate ,good as previously working well.turn down flow rate via water inlet gets hotter but then no flow...