Sorry for being such a dunce, do you mean on the Suprima upstairs or under the white box of the Potterton unit.
BG seemed bizarre - it was an indian call centre and she was saying all parts, no matter what, was included. I strongly doubt that! Then she said it it was going to be prohibitively...
A long shot I know but is anyone out there knowledgeable about these boilers? It is a Potterton Suprima 40L
My problem is that the central heating works fine but the hot water, however, doesn't heat up at all. When I turn it on using the wall panel, the red light stays (not a lock out) on and...