i may have connected the wrong micro switch to the wrong differential switch on my baxi 105e instant does anyone know where i can get a wiring diagram of said micro switch or for that matter would the boiler actually work if they were on the wrong switch because it does baby but like i said I'm sure they were on the other way round but it worked like that too one thing i have done different is Ive just finished power flushing my own boiler and now (with the leads not as i remember them) i can hear a bubbling noise from within the boiler now i know the expansion vessel is naff and i have just pumped the water out through the prv I'm hoping that the noise i can hear is just water sloshing about in the space a air bubble occupies some one tell me I'm right as I'm well paranoid about blowing my own house up how embarrassing