The Keston potentiometer knob resides on one of the spindles located on the front of the control panel and allows the user to manually control certain aspects of the boiler's operation. Some boilers enables to change the temperature and even allows 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.
Compatible with C40, C40P, C55, C55P, C90 and C110
Fits various Keston appliances
Technical specification
Waist Sizead74cj13guTypePotentiometer KnobToilet Cistern CapacityFTW--Supplier Part NumberC17400090Brand NameKeston