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Hi, I have a potterton combi 100 boiler. I have checked the pressure and it was set at 1.5 when cold (boiler not running) but this shot up to about 3.5 (into the red on dial) after about 1/2 hour of running central heating. There is an intermittent whistling noise coming from the boiler...

Hi, i read on another posting that after you have fitted a new PCB the you should adjust the range rate. Can someone tell me how to do this and what it does. Also i explosive ignition which now seems worse since new PCB board was swapped over. Will altering the range rate help with this...

Hi, In need of a puma PCB21/18601. Been repairing mine for quite a while now but the time has come to replace it. Anyone have a spare :D 07717170859 thanks

Hi, after months of trouble with my potterton combi 100 boiler. My PCB board is now sparking like crazy. Does anyone have one these available for sale. Im a bit skint so cheaper the better :lol: thanks allison

Hi all, When i run the HW tap there is a red light that comes on inside and the boiler fires up and i have hot water so i presume all pumps etc are working fine. However... When i push the swith to turn on the CH, whether on constant or timer i get absolutly nothing...no red light...

Hi all, this is my first post so i really hope i get some help. I have a 2 gang light switch and one of the switches is wired up to the ceiling light it is a 2 way light and has L1 L2 and com. I was wanting to add an extra light by taking a live and neutral form the ceiling rose and wiring...