WORCESTER 280 RSF BOILER

[jmq]

Can anyone help my problem is with the ch on my boiler . Ch comes on no problem but when tempreture is reached in the system for some reason the flow and return locks out so when the burner relights it goes out after 1 minute. Could the problem be with the expansion vessel or is there a valve set up or a switch within the boiler that isolates the flow and return from the boiler

 

[Agile]

Its not the expansion vessel!

It might be a problem with the pump jamming when its hot but its a little difficult for me to read all capitals at this time of day!

Tony

 

[jmq]

discovered problem is with diverter valve for some reason switching from heating to hot water after 15 min approx is the problem with the valve or the pcb any help would be grateful