been out to a potterton pro floorstanding condensing boiler only a couple of years old but they had it moved only a few feet and it hasnt worked since now i went and im just back from there and i said "if its just been moved 3 feet and nothing else then check to see if hes crossed the pipework" has it got a flow switch the fellas who done the job more or less said"dont talk crap" but i think they know it will be murder to cross them back over