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yes fair enough , but can anyone still point out why the piston dosent come out. i hate gas first and last time i have anything to do with it..

yes i took out the gas valve

and just to let anyone when i say i changed the pcb board i ment the flame iginition pcb .. im thinking it could be a problem with the main regulation pcb board but dont think so cos i did see the piston working for a while .. im so confused

hello i changed the diverter valve .. the piston was going in and out to start with for about 4 hours then it just stopped..

can anyone help.. i have a biasi 24s with no hot water , ive changed the diverter valve and the pcb board .. the central heating is working fine . the water from the taps are flowing fine just freezing cold . i took the microswitch off for the hot water and simulated the boiler working and the...