I have a potterton prima 60f that keeps locking out. So far I have had the PCB, the fan, the pump and gas valve changed and had a chemical flush, yet my boiler still won't work. It fires up fine, runs for a minute or so then locks out.
Any one got any suggestions

Gary Wells, January 2009

hope this helps u say u have had the fan changed i had the same probs and its the fam bearings dry make sure its spinning free there are 2 sets of bearings in the fan assembly2 access the inner 1 use a alan key it might be due 2 some condensation getting in mine is doing the same n ive greased them n its working fine but im still trying 2 find new bearings online . good luck

steve, November 2009