The control knob sits on one of the spindles located on the front of the control panel and allows you to manually control certain aspects of the appliances functionality. Some boilers allow you to change temperature and some even allow you to change the current function. This means the user can have the boiler produce hot water without the central heating being on and vice versa .
Fits Various Appliances
Technical specification
TypeControl KnobColourBlackManufacturer Model No5117747Brand NameValor