hi baxi combi 80 eco
cleaned system,
cleaned both heat exchangers,
cleaned fan working ok,
cleaned pump working ok,
new temp sensor,
new gas valve,
new pcb board,
new 3 way valve,
air pressure pips clean switch working ok
h/w is ok, adjusted the gas valve,
good air in air out ok,
fires up runs gets up to temp then keeps on firing up then shutting down,
help

DAVID MCCALL, March 2011

hi
it keeps firing up shut down in seconds
ho yes i have also put in line a expansion chamber
its been doing this for weeks it all started when i was not getting h/w so i cleaned the h/w heat exchanger now h/w is good
and the rad's get hot very quick it all pumps round that's all good but when the are up to heat the boiler still keeps a high flam then shuts off in seconds it's back up high flam i am thinking the pcb board / help

DAVID MCCALL, March 2011

how long has it been like this and how often does it go on/off

brian, March 2011