Thanks thought that was the case just unsure as the bottom switch doesn't light up when I turn it on not sure if it's just the light blown in the switch or if it's not wired in.
Do you suggest I leave the boost off and hope the economy works?
Would love to eventually have a bath!!
Help!! Just moved into a 2 bedroom first floor flat which has a megaflo high efficiency heatrae sadia tank thing in the cupboard on the side of it there are 2 grey boxes. Fitted into the wall behind the heater are 2 switches one when you turn in it on has a red light that comes on the other...