Vaillant Control Knobs (Page 3)
The control knob sits on one of the spindles located on the front of the control panel and allows the user to manually control certain aspects of the appliances operation. Some boilers allow you to change temperature and some even enable 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.
VAILLANT 143940 KNOB
Part No: 1376138 / MPN: 143940
VAILLANT 125117 HANDLE
Part No: 1373643 / MPN: 125117
VAIL 143952 KNOB - OBSOLETE
Part No: 1376144 / MPN: 143952
VAIL 0020107756 BUTTON - OBSOLETE
Part No: 1383191 / MPN: 0020107756