I have a potterton perfoma 28i boiler.when ever the central heating comes on or the hot tapis run, the flame ignites till it gets to the next temp reading on the boiler. It then goes out but reignites a few seconds later. This means the hot water takes ages It never used to do this, what is the problem likely to
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.