trips at 60, dhw exchanger has been changed by bg last week, gotten worse since then. had a few bg enginners all of whom said scale on dhw exchanger but changed now, water heating to high temp so don't think scale is the problem.
Hi,
Have a biasi combination boiler. Kept locking out when hot water on. British Gas came and changed DHW, now worse than ever. Water gets very hot despite on low setting and then lockout kicks in. Any ideas? Could it be the thermo??
Cheers
Chris