central heating problem

[Debodonald]

I have been trying to repair my sons central heating system i have installed a new pump, checked tri-valve manualy. the boiler fires up and the pipes get hot either side of tri-valve but boiler cuts out befor rads get warm.

all rads have been bled, hot water is working but no heat in rads

any ideas?

 

[miajanjua]

have you bled the pump, the boiler, and checked that both flow and return valves at the boiler are open

 

[payney1974]

need more info really ie boiler ? bog standard y plan? has ch been getting gradually worse or just stop one day? does system fill up ok or is it very slow? possibly blocked cold feed? is there an airjec fitted?

 

[WHPES]

Have you checked / tested the room stat?

 

[willing2learn]

Frozen condensate again?