i ve got the ferolli optimax he 32 and cand get the heating to come on, its making all the right noises but d2 keeps coming up. Any ideas ?

mike, December 2012

d2 is the overheat code when the boiler has overheated. it will work once its cooled down. check the diverter valve see if its opening when asking for central heating as if it remains closed it will cause the boiler to overheat hope this helps

santa elf, December 2012