Worcester SI Mechanical Timer 77190018580 Rare obsolete timeclock
Worcester Bosch 77190018580
Fits the following Worcester SI boilers:
SI 25 FSN LPG COMBI
SI 25 FSN NG COMBI
28SI NG FSN COMBI
28SI LPG FSP COMBI
C1 FSN BRITISH GAS COMBI
The programmer, also known as the clock, timeclock or timer is a user interface that enables the user to control when the heating and hot water is fired up to maximise home comfort.
It also allows you set and maintain the room temperature
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