Sime Mechanical Time Clock 6197719

The Sime Mechanical Time Clock is a mechanical time programmer used in Sime gas boilers to control the on and off periods of the heating and hot water. It is listed under clocks, timers and programmers in the gas boiler spares range. The unit fits a number of Sime combination and system boilers, including boiler variants supplied without a factory-fitted time clock.

• The clock dial or timer does not advance, so the boiler stays on the same programme
• Time keeping is lost repeatedly and the switching periods drift
• Heating or hot water fails to come on at the set on-time, or continues running past the set off-time
• The setting pins or dial cannot be moved or hold their position
• Manual override or advance does not respond when pressed

• Confirm the boiler model and GC number against the appliance data badge
• Check whether the boiler was supplied without a time clock and has a blanking plate fitted in its place
• Inspect the existing programmer mounting and connections before removal
• Note the part number on the existing time clock where one is fitted, as some Sime appliances use different controls