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cheers for the reply, but still no good :( probably didn't give enough info on the first post, but it when it locks out its when it first goes to fire up, and when it does fire up it can take about two or three attempts!! don't know if its just me but it only seems to lock out when its...

can anyone help me out. just moved into a new property with a potterton powermax he 115 condensing boiler fitted. after moving in the boiler kept locking out giving a a07 code(heat exchanger monitering fault) after the lockout. the lockouts weren't that frequent as we were only using hot...