E E emmi 26 Jan 2012 My radiators downstairs were freezing and upstairs rads hot, I wondered if this could be the pump but since switching a silver box with a lever nearby to "MAN" they now seem to be hot, what does this mean and is this safe?
My radiators downstairs were freezing and upstairs rads hot, I wondered if this could be the pump but since switching a silver box with a lever nearby to "MAN" they now seem to be hot, what does this mean and is this safe?
