I have a Potterton Suprima 30 and guess what it locks out! The house is 5 years old so guess the boiler is, surley the last owner did not choose the model!!
Playing around and logging the times it resets, it seems to happen more often when the hot water is hot in the storage tank. Also the water does seem to get very hot!? The other day it would simply not come back on until I emptied the hot water out of the tank!
Talking to my dad (ex plumber) and brother (ex Potterton Suprima owner) We feel it could be the following in this order?.
- Faulty overheat sensor
- Faulty thermostat allowing the water to get too hot and triggering the above. (This is taken from another post so unsure if they mean the one on the tank?)
- Faulty PCB