Hot water cylinder not heating up (when heating is on)

[Rippy]

As above, my hot water cylinder will not heat up when the heating is on. The hot water will heat up when the immersion is on.

The pipes going to the coil are both hot, even when the heating is on all day it won't heat!

Any help greatly appreciated

Thanks

 

[happyflyer]

I reckon if you could get your mouth around that lot Tamz you could play it.

I doubt if that is south of Watford Gap, looks like it could be up here somewhere

 

[tamz]

Norn ireland i think Tony. The only place you see the willis heaters for the immersions (which work very well)

 

[Ermintrude]

Looks like Steve wonder did bus mans holiday tour of NI or croppies been moonlighting. The bbu conversion appears to be the main issue. Flow straight into return try close that red gate valve .