Ferroli Modena 80E water & CE turning on & off rapidly?

My water & CH both keep turning themselves on & off about every 10-15 seconds, the CH eventually gets up to temperature but the water is a real pain. No problem with casing off so I think (hope) it might be just a blocked flue/air intake - any ideas?
TIA
Peter, January 2005


done
you could be right about the flue being blocked, it could also be a partialy blocked heat exchanger or fan. the fan may not be getting up to the correct speed. dont forget to isolate the appliance first though.

P D, August 2007
Circulation problem. Check the pump and that the system is clean. Part blockage in the heat exchange can cause the same problem.

warwick@longmanheating.co.uk, March 2006
boiler keeps going out with the rad light staying on, i still have hot water but no heating on a ferroli modena 80E

colin watts, November 2005
link Click here to see other fixes for Ferroli.