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The pump comes on and the red light indicates the timer has called the boiler to fire up. nothing more happens. If I press the button in the base of the boiler manually, the boiler starts but the same procedure is required next time. I believe this has happened in the past but I forget...

Hi All, I have a Poterton profile that seems to do very well but the house is old and there are problems with space heating. One thing I would like to understand is the purpose of the knob on the front of the boiler and how it should be set. There are other questions but that is a...

This is really helpful, why did it take two years to find this forum! OK, I presume the pump overun stat is on the boiler, it is a potterton profile, where is it? please. if it is jammed on surely the pump would NEVER switch off at all? jobloggs, that Pegler tutorial is magic reminds...

I can see why pumping the system would reduce freezing liklyhood, however, this is happening when the temperature is well above freezing. Somehow, the pump circuit is complete when everything else is off, I cannot be sure but at least one of the folk who have looked at the problem have left...

Yes pump runs during cold weather but the rest of the system is OFF, no red leds on programmer, no boiler fired up. Do you know the pin-outs for a Honeywell T63608 room stat? I am trying to draw a COMPLETE circuit for the controls and the drawing in the programmer documents does NOT show...

Hi, I have just joined this forum but have already learned much from just reading, the problem I have has baffled several heating engineers/electricians/plumbers. The full history would take ages but I believe this is the basics of the problem. The system is fully pumped with reliable...