i have a stelrad sprint f boiler and would like to fit a new programmer so that i could set the c/h to come on with the time clock, the timing clock on the old programmer never worked so the c/h was either off or on. (old programmer= potterton ep3000) when i opened the ep3000 up i found no wires going to terminals 2 and 4, the c/h on and off terminals! does this mean it can never be wired so that the c/h will work with the time clock of the programmer? been told that the drayton tempus 7 is the best programmer to replace the potterton ep3000. any help greatly appreciated.
