Hi
Yes that sounds right except the steel box isn't on top, its below it. The steel box isn't making the noise, its the actual box where the controls are (the timer and the switch where you can adjust it to "24 hours" "All day" "Twice" etc) thats making the noise.
Thanks so much for your...
Hi I have the same problem as Tasha, our box thingy is making a whirring buzzing type noise but ours is a lot older! It has copper pipes coming out of it though. Like Tasha its probably something really obvious but I'm clueless and need help please! Its really loud! The central heating and water...