My boiler is dead. Electrics checked and OK pump, and valves working OK . No room stat. What could it be.

Roger Church, July 2008

we can only give advice if you give us a sequence of what happens when you try dhw demand and then ch demand for example.
we're not magical, we diagnose based on general sequence of operation.
we need to hear, open hot tap, dhw demand light comes on, pump runs etc etc etc or we will be guessing which is pointless and could be expensive

iain, July 2008