ariiston euro combi

Joined
18 Mar 2008
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Location
London
Country
United Kingdom
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 no it turns on properly just does not get hot and stays on fine. what the web site to get the instructions and fault finding chart
 
Its a bit difficult to tell from here.

Does the boiler react to HW demand and does it stay alight the whole time?
 
With the CH and boiler cold. Fire up boiler for HW and feel the HTG pipes a few feet from boiler. Should stay cold.
 
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
 

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