can someone help me my reavenheat rsf 84 et boiler when you turn on the hot water the boiler fires up ok then after about 30 seconds the flames go out then fire up again then goes out and fires back up and the same when you put the central heating on the boilers had a new pcb board a new electrode and ive taken the thermisters out and cleaned them cna anyone help me please

steve, July 2012

sounds like the boilers overheating if its cutting out regularly
check the autoairvent ISNT blocked

AWOL, July 2012