Potterton Suprima Not Lighting

A customer of our was having trouble with his Potterton Suprima not lighting. Another engineer looked at it and when it was attempting to light it would go through the ignition sequence as normal but was sparking slowly. The green light on the PCB was flahing quickly as it does during ignition but it may have only sparked once a second when the gas valve opens. He changed the ignition lead as they often break down. The original ignition leads had a red silicon sleeve and were quite vulnerable to breaking near the electrode. There is now a replacement lead which has a black 'heat shrink' style sleeving where it passes through the case and connects onto the electrode. After replacing the electrode lead the boiler was lighting well.

This was fine for about 24 hours before I was called out there and the boiler was displaying the same symptoms. The boiler was fitted with the original PCB which I replaced like-for-like. Testing the ignition the spark was occurring much more rapidly. The boiler was a little slow to cross light but checking the burner, injector and gas pressures everything was as it should be.

Disclaimer: The works described in this blog are a record of work undertaken and should not be taken as guaranteed to solve your problem. Work should only be carried out by persons qualified and competent to do so.