BIOLER SWITCH OF POINT?

The boiler will have its own electrical supply - you could turn that off

The boiler will probably have a timer/programmer you could select "off" or "on" sometimes and not other times

The boiler may well have a user thermostat - you might turn it to zero or off

The central heating control may well have a room thermostat device - you could set that to a low setting

You do not mention the make & model of your boiler or the timer control

Your question lacks a certain clarity of reason.

Peccavi
January 2010