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