What's happening is boiler runs for half hour then stops flashes up code he which according to manual means PCB but everytime I have had PCB fault boiler was completely dead . I am wondering if this is more,a overheard fault any body else come across this problem
Can be overheat stat,top right hand on flow,check compression connections above boiler,any leakage can run down,and get onto stat causing LE or HE faults.
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