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i apparently need a new diverter valve because the pressure drops when cold water is run. just wondered how much people charge as i have been quoted £220 for the part i have a ferroli modena 80e

on the ferroli modena 80 e could my pressure gauge be faulty rather than a problem with the boiler?

hi , i have had an ongoing problem with my modena 80E firrolie boiler. when heating is on its ok then whens its off the pressure drops to zero. water is coming from the pipe outside so have had the expanssion vessel and prv valve changed but it still has no pressure. is there anything...