Potterton Netaheat 60e

[retardimus]

The boiler fires up but shuts down after 20 mins and stays like that till next cycle.
It is pumped and pump is working. Motherboard is newish.
Radiator water is very hot even though I turned boiler down to min.

I can restart it by turning control panel to constant then push button on boiler.

 

[75pete]

Worth checking the F&E tank level/ check for over pumping/ feed is not blocked.

 

[retardimus]

Thanks but how to check for overpumping/feed blocked? Button on boiler now wont start it.

 

[gas112]

button ? little push in bit , that is the over heat stat
Rad water very hot sounds like main stat has gone getting too hot causing overheat stat to trip

 

[retardimus]

Thanks. Where is main stat?