Recent content by big alb

i have a ravenheat 25/25 and as it warms up it it makes some clicking noises (relays i presume) and justs keeps switching itself on and off continually. it seems to happen on both CH and DHW although it is worse on DHW. anybody any ideas?

Can anybody please help me. I have a Ravenheat RSF 25/25. When I switch on the HW or CH the boiler flame keeps knocking off and coming straight back on again resulting in a noise which i can only describe as a persistent "whoosh". It doesn't happen straight away - after a couple of minutes...