ariston micrognus 23mff1

[shaund]

I have Ariston micro Genus 23mffi which is about 6 years old. Recently when we open the hot water the pilot flame switches on but then after a few seconds it switches off for a few seconds and then on again and so on. The result is that the water temp keeps changing from hot to cold to hot and so on. The radiators seems to be working fine.

Any ideas as to what can be the reasons for that and how it can be fixed will
be greatly appreciated.
Thanks.

 

[BOB D.O.L.E]

could be fan, blocked flue venturi or flue or air pressure switch or pcb.

 

[gary71]

Blocked plate heatexchanger or defective hot water thermister

 

[spacethegas]

gary71 beat me to it.

h/e prime suspect.

 

[spacethegas]

could be fan, blocked flue venturi or flue or air pressure switch or pcb.

not likely as c/h would be affected.