i had a problem with pressure dropping to zero,and was grateful for the advice on here that the expansion vessel had failed,which it had done so was replaced.
hot water works okay,but when heating has been on, F1 appears on the control panel.the manual says it is either.overheating or no flame detected.
on the front is a reset switch.
if i press this the boiler restarts and heating startsup.so i assume it is a overheat problem
any ideas on what the problem is,and how to check.
also the pressure still drops 1/2 a bar when cold.
hot water works okay,but when heating has been on, F1 appears on the control panel.the manual says it is either.overheating or no flame detected.
on the front is a reset switch.
if i press this the boiler restarts and heating startsup.so i assume it is a overheat problem
any ideas on what the problem is,and how to check.
also the pressure still drops 1/2 a bar when cold.