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