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how do you turn the ch pump if it hasnt been used for a while?

Yep the boiler lights up and i get hot water. if i remove the cover will water pour out? I could try to replace it but i would need instructions with pictures if possible don't what u mean by motorrized valves on the CH pump?? what size/type pump would i need to buy as i dont know what...

Hello all my radiators remain cold when i turn on the heating. the thermostat is turned up. the rads have all been bled. Is it the CH pump thats died?? (Wilo Gold CH Pump) I have a Powermax 155CP combi boiler also what is the big screw in the middle of CH pump used for? can it be...