When running hot water at less than full on (shower typically) boiler will go out following 'kettling' then relight.
Flame does attempt to modulate ok, reducing flame as temp rises, but probably not enoguh for it then goes out only to relight on cooling.
Both diaphrams on the changeover unit are strong and working well (no apparent leaks) suspect DHW overheat switch for CH works fine. Water pressure still good on hot (unchanged)
Flame does attempt to modulate ok, reducing flame as temp rises, but probably not enoguh for it then goes out only to relight on cooling.
Both diaphrams on the changeover unit are strong and working well (no apparent leaks) suspect DHW overheat switch for CH works fine. Water pressure still good on hot (unchanged)
