clock is off cant put my heating or hot water on , have checked fuses was told it has battery inside , how do i get to it ?

maddie, February 2012

The older brown version takes a pp9 replacable battery. The newer grey version has a lithium battery soldered to the circuit. The manufacturers technitcal dept. says they don't know the battery number and that it is expected to last the life of the timer - 15 years and they don't recommend trying to replace it.

Of course they don't they just want to sell a new timer every 15 years. Drayton CONtrols are the manufacturer.

Brian Andrews, March 2012