Also referred to as control knobs and temperature knobs, they usually sit on a spindle located on the front of the boiler the spindle when turned, turns a potentiometer that’s located on the printed circuit board and if the knob is turned too hard the spindle is designed to break hence protecting the printed circuit board from damage and an expensive repair, the knob allows you to manually control aspects of the functionality of the boiler. Some boilers allow you to change temperature and some even enable you to change the current function. This means you can have the boiler generate hot water without the central heating being on or central heating on without hot water.

Main Control Knob Assembly 092020

Part: 092020

Price: £13.43
Baxi 5118397 Duo-Tec Control Knob

Part: 5118397

Price: £13.37
Ferroli 39812350 Domicompact Knob

Part: 39812350

Price: £6.86
Baxi 0544659 Firelite 4 Control Knob

Part: 0544659

Price: £14.03
Ferroli 39817570 F24B Control Knob

Part: 39817570

Price: £6.18
Main Control Knob Assembly 233466

Part: 233466

Price: £11.55
Glowworm S204698 Micron Control Knob

Part: S204698

Price: £6.31
Chaffoteaux 61312930 Minima Control Knob

Part: 61312930

Price: £4.70
Potterton Control Knob Assembly 237879

Part: 237879

Price: £9.98
Ariston 997250 On-Off Push Button Kit

Part: 997250

Price: £16.01
Main Control Knob Assembly 237879

Part: 237879

Price: £9.98
Potterton Control Knob 0544659

Part: 0544659

Price: £14.03
Potterton Control Knob 0520799

Part: 0520799

Price: £15.57
Biasi BI1475102 Parva Knob

Part: BI1475102

Price: £3.96
Biasi BI1605106 Riva Compact Knob

Part: BI1605106

Price: £4.14
Main Control Knob 249119

Part: 249119

Price: £3.96
Ferroli 39801290 Optima Combi Selector Knob

Part: 39801290

Price: £4.50
Ariston 60074478 Knob

Part: 60074478

Price: £4.51
Ferroli 35003010 Optima Knob

Part: 35003010

Price: £4.17
Potterton Control Knob 092020

Part: 092020

Price: £13.43
Glowworm 2000801872 CXI Knob

Part: 2000801872

Price: £23.71
Baxi 230981 Barcelona Solo Control Knob

Part: 230981

Price: £8.66
Saunier Duval S204697 Control Knob

Part: S204697

Price: £8.37
Saunier Duval Control knob C/W clip 2000800400

Part: 2000800400

Price: £8.37
Baxi 236394BAX Bermuda Vp3 Control Knob

Part: 236394BAX

Price: £11.48
Main Control Knob 234544

Part: 234544

Price: £11.03
Ideal 173562 Evo Knob

Part: 173562

Price: £6.22
Potterton 238172 Suprima Control Knob

Part: 238172

Price: £7.68
Baxi 230276BAX Bermuda Adaptor Knob

Part: 230276BAX

Price: £10.30
Main Control Knob 222039

Part: 222039

Price: £7.87
Potterton 0350395 Knob

Part: 0350395

Price: £3.96
Baxi 0350395 Knob

Part: 0350395

Price: £3.96
Saunier Duval S204698 Control Knob

Part: S204698

Price: £6.31
Glowworm 801758 Hideaway Control Knob

Part: 801758

Price: £12.99
Glowworm S448103 Fire Control Knob

Part: S448103

Price: £7.73
Alpha 1.023544 CD Control Knob

Part: 1.023544

Price: £3.96
Main Control Knob 240829

Part: 240829

Price: £11.75
Baxi 26002014 Knob

Part: 26002014

Price: £8.66
Main Control Knob 5118397

Part: 5118397

Price: £13.37
Chaffoteaux 997250 On-Off Push Button Kit

Part: 997250

Price: £16.01
Baxi 236394 Baroque Control Knob

Part: 236394

Price: £10.20
Halstead Finest Knob Plastic 300656

Part: 300656

Price: £10.56
Baxi 237879 Bermuda LFE Control Knob

Part: 237879

Price: £9.98
Baxi 236462BAX Genesis Knob

Part: 236462BAX

Price: £11.37
Potterton Control Knob Assembly 227306

Part: 227306

Price: £8.84
Main Knob Selector Switch 5107344

Part: 5107344

Price: £4.15
Chaffoteaux 992027 Knob

Part: 992027

Price: £3.96
Ariston 61312930 Combi Knob

Part: 61312930

Price: £4.70
Ariston 61016290 Knob

Part: 61016290

Price: £4.84
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