Fault 30 40 50 indicated on front. I suspect fan fault but I can't find manual to check. Hot water ok but no heating.

John Pugh, October 2016

I have found the manual for you - an easy search...

http://www.freeboilermanuals.com/ariston/

It's a very comprehensive manual but offers no Error Code descriptions as far as I can see.

If the boiler supplies hot water then surely the fan must be good?

I am not a heating engineer - I just guess.

Good Luck..., October 2016