have had both heat controller's fitted OK for a week then problem started again .Green led flashes red led shows for 30 sec clicks green led starts flashing again boiler does not start .By switching the mains off and on 6? times it may work boiler does start up when it fills like it had a new main board fitted 1 year

c ward, March 2009

circuit board requires replacing mate, approc 80 quid and 1 hour for a diy;er

marc the sparky, January 2010