Registered Forum User
Ducati Corse
Posts: 3,921
Join Date: Jun 2001
Location: Drayton Bassett, Staffs
Mood: Tad more confident
Rocker to eliminate any confusion first. You aint got the emmersion heater on by any chance have you.
You need to work out if you have a single diverter valve or two independant valves. Which ever it is, follow the pipework from the cyclinder to the valve. With the boiler running, you can feel the hot water passing through the valve. ( same temp each side). Come back with yor findings.