my radiotors are not working but my hot water does although i have to run the hot water for a lomg time before it runs hot and also the flashing D but nothing has happend yet and its been like it for a couple of days its a ferroli optimax 25
the radiators work ok but the water runs very slow checked water filter that is ok but im stuck now can any one help
neil
May 2009
Hi,
I think its your water pump or the valve that allows the hot water go to your taps and also your radiators.
I'm sorry I cannot be more specific or detailed in my answer.
Had a similar problem, now its fixed after the water pump was replaced.