potterton prima 60f locking out?

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