On 27/12/16 19:44, Nicola wrote:
replying to Alan, Nicola wrote:
Thanks guys. I've got a plumber coming tomorrow just making kids put
dressing
gowns on for now hahaha Boiler fires up when waters on but not with
heating I've turned it off and
tried firing it back up. My husband thinks it's a valve

Has your husband checked the system pressure on the gauge on the front
of the boiler? Should be 1 bar or the needle should be in the green segment.