just fitted replacement pcb slightly different one to before honeywell replacement for a siemens but took my time and connected it as before but i,ve got a 30 degree led flashing
it,s the top joint where the copper tube thats got sensors on it connects to the heat exchanger left hand side of the boiler as you look at it the pipes secured with a double spring clip
i,ve got quite a selection of incorrect seals so far they tried to sell me the pipe too what type of seal is it and where can i get one plumb centre don,t inspire confidence