Is their a guide to replace the diaphragm on the above boiler as the pin isn't quite reaching the micro switch for domestic hot water one of the silver slotted screws at the back seems impossible to get a screwdriver on it, or do you undo the 2 brass slotted screws to the left of the diaphragm housing.
I have read other people saying its only a 20 minute job !
Would appreciate a guide or info how to do this job.
Thanks
I have read other people saying its only a 20 minute job !
Would appreciate a guide or info how to do this job.
Thanks