I have a Potterton Prima 50F NG that has been faultless for years.
Recently though it has developed a problem where it sometimes fail to start. This is getting worse to the point that it needs help most times.
What happens is that that when the control circuit calls for the boiler to start, the fan starts for a couple of seconds, then it switches off and repeats this fan start cycle over and over again without firing.
If I tap under the control knob buring the short fan running cycle (and get the timing right) the fan runs longer and the boiler starts up and runs as normal.
Any ideas what this might be please
Don't want to throw out an otherwise OK boiler if I don't need to but the wife and kids keep complaining !!
Recently though it has developed a problem where it sometimes fail to start. This is getting worse to the point that it needs help most times.
What happens is that that when the control circuit calls for the boiler to start, the fan starts for a couple of seconds, then it switches off and repeats this fan start cycle over and over again without firing.
If I tap under the control knob buring the short fan running cycle (and get the timing right) the fan runs longer and the boiler starts up and runs as normal.
Any ideas what this might be please
Don't want to throw out an otherwise OK boiler if I don't need to but the wife and kids keep complaining !!