Ferrloli Modena Boiler.....intermitent fault

[aspley]

Hi Guys......any ideas on this one?
Ferroli Modena boiler lights up and burns for a couple of mins than switches itself off. Does the same with hot water demand....heats the water for a couple of mins, switches of then starts up again and the cycle continues.

I describe it as an intermittent fault because it can run for a whole day before cutting out but at other times as I say above it cuts out after a few mins.

I'm puzzled....any ideas would be gratefully received

 

[Jordon]

Easy boiler to work on but the fault sounds like it is a part that a rgi needs to do so get someone in.

 

[HH1]

Had a very similar problem once.
Changed both temperature sensors and cured the problem.
Should be able to pick them up cheaply on the likes of ebay.

 

[aspley]

I'll give that a go ....thanks