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Has anyone got any thoughts on why my living room radiator is only ever warm and not hot. I have a potterton boiler with a tank upstairs the pump and the honeywell threeway valve also upstairs. The three radiators that are downstairs have two pipes each coming from upstairs 2 of the radiators...

Hi to everybody on the forum as this is my first post. I have a potterton prima f50 boiler and it has just stopped working I have tried resetting it. The pump upstairs is running ok the timer upstairs lights up as normal. I have put the hot water and heating on continous and turned up the...