hi i have what i am told is a gravity fed system i get very hot water,and until recently very hot radiators,past few days however radiators are only warm i have drained and re bled the entire system after fitting a new c h pump there is no air in system what i have noticed is that the boiler doesnt stay fired up for as long as it did (only maybe a couple of minutes now) before cutting out it is a glow worm ultimate 50 boiler which has served me well do you think its the thermostat or something else thanks in advance
only just warm central heating
- Thread starter gary theo
- Start date
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is the pump in the right way theres usually an arrow on the side or bottom dont go by the position of the terminal box 
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