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how to tell if my pcb is faulty?

changed my pcb two years ago becaase it kept locking out it is now happening again could it be the same problem potterton suprima
raman, August 2008
Check out this...

http://kaijaks.co.uk/blog/nick/2008/02/10/dodgy-old-boiler

it may be a solution to PCB problems for under £1 providing you can solder...

Richard Buxton, September 2008
link Click here to see other fixes for Potterton.