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