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underpar12
hi guys been called to a plumbers job ,system s plan he was just fitting bolier change valiant eco ,he connected both cables l,n,e flex one to mains intake and removed link and the pump into the terminals. as soon WE TURN ON the fuse spur the 3amp fuse blows instantly, nothing else has been touched . i checked the correct mains conections etc all ok. removed time clock ,still blows 3 amp . iam thinking fault was already present before bolier was swapped. any help ,