the honeywell valve looks like this
http://www.google.co.uk/products/catalog?q=honeywell+2+port&cid=4379696568803476021&ei=8ApcTbO6F4P0wgWouOSfCg&sa=title&ved=0CAcQ8wIwADgA#p
the valve making the buzzing noise looks like this...
Hi just wondered if anyone can pass on some advise please
my setup is as follows:
3 storey house (barrett type)
Potterton Suprema l40 Boiler (upgraded PCB)
Potterton Ep2002 programmer
Potterton T40 thermostat
Santon premier plus tank
My problem is my boiler is heating up my water...