Potterton Boiler problem

[NeilMc]

Our Potterton Boiler is around 9 years old, recently it has developed a fault. It fires up ok, runs until the water in the Boiler gets to the correct temp, shuts itself down, pump still running as normal, then wont fire back up again, re-setting it results in the boiler igniting for around 10 secs, then closes down again, result is no hot water, or heating. Thought there might be a problem with the motorised valves, I have two, set them to manual, same result. Any ideas what could be causing this problem.

Thanks

 

[ChrisR]

Boiler is??

Thermostat, pump not pumping, blockage, Air flow problems...

 

[NeilMc]

Boiler is a Potterton Suprima

 

[ChrisR]

Add possible pcb failure to the list then.
You need to see if it's getting really hot and where, is it entirely consistent, does the boiler thermostat knob make a difference etc.