Glow-worm overheat thermostat is a control on the boiler that enables you to set the temperature of your central heating system. There are many different styles available and they don't all necessarily need to be attached to the boiler, as wireless thermostats and Wi-Fi stats are also available.
Fits a number of Glow-worm appliances
Technical specification
TypeOverheat ThermostatManufacturer Model No800272Brand NameGlow-worm
Reviews
Glow-worm Overheat Thermostat and Heat Sink 800272