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High pressure on my Optima Ferolli 901 central heating?
DHW Run's hot and then goes cold?
2 amp fuse blown?
c/h hotwater?
shower in bathroom keeps going hot then cold then hot etc?
DHW running hot then cold?
falling presher?
ferolli modena 102?
Can't get hot water but central heating is working fine, any ideas??
how can i fix this ?
what part do ineed?
Ferroli Boiler Optimax HE 31C?