Good day,
I have up-graded my boilers (Potterton suprima 60) PCB. the old unit kept locking out the boiler. However now I have noticed that the water pump seems to run all the time, well it stops every so often for about 2 seconds then stars back up even though the burner stays off.
Is this normal with the up-graded PCB?

Mr C, January 2010