BOILER STILL WORKS WITH CONTROLS SWITCHED OFF Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[moog]

HI. CAN YOU HELP. I HAVE A POTTERTON SUPRIMA BOILER AND DRAYTON LP241 CONTROLLER. WITH HEATING AND WATER SWITCHED OFF, THE BOILER KEEPS WORKING ABOUT EVER 5-10 MINUTES. IT IS ON THE WATER SIDE BECAUSE TANK IS HOT. I HAVE TURNED THE TANK STAT TO MIN AND REPLACED THE LP241, BUT BOILER STILL OPERATES. THE SYSTEM IS PRESSURISED. I WOULD BE GRATEFUL FOR SOME HELP IF POSS. MANY THANKS, MOOG