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.

Ariston 60074477 Knob

Part: 60074477

Price: £3.96
Main Control Knob 0520799

Part: 0520799

Price: £15.57
Vokera 1859 Linea Temperature Knob

Part: 1859

Price: £4.00
Ideal 173562 Evo Knob

Part: 173562

Price: £6.22
Baxi 222039 Control Knob

Part: 222039

Price: £7.87
Potterton Control Knob 092020

Part: 092020

Price: £13.43
Potterton Control Knob 249119

Part: 249119

Price: £3.96
Saunier Duval S205146 Control Knob

Part: S205146

Price: £6.57
Vaillant Buttons Grey, Kit Of 3 0020048969

Part: 0020048969

Price: £12.72
Main Knob 5110844

Part: 5110844

Price: £15.66
Ariston 61312930 Combi Knob

Part: 61312930

Price: £4.70
Ariston 61016290 Knob

Part: 61016290

Price: £4.84
Biasi BI1535101 Garda Knob

Part: BI1535101

Price: £3.96
Heatline D001060144 Vizo Control Knob

Part: D001060144

Price: £33.62
Ferroli 39812350 Domicompact Knob

Part: 39812350

Price: £6.86
Ariston 998603 Microgenus Control Knob

Part: 998603

Price: £6.00
Baxi 960HP/1051 Knob

Part: 960HP/1051

Price: £8.86
Ariston 65100687 Microgenus Knob

Part: 65100687

Price: £3.96
Glowworm 2000800400 Ultimate Control Knob

Part: 2000800400

Price: £8.37
Glowworm S427524 Ultimate Control Knob

Part: S427524

Price: £12.36
Main Control Knob 222039

Part: 222039

Price: £7.87
Baxi 5107345 Knob

Part: 5107345

Price: £3.96
Potterton Control Knob Assembly 226656

Part: 226656

Price: £7.85
Potterton Control Knob Assembly 227306

Part: 227306

Price: £8.84
Main Control Knob Assembly 233466

Part: 233466

Price: £11.55
Potterton Control Knob Assembly 234544

Part: 234544

Price: £11.03
Potterton Control Knob Kit 240829

Part: 240829

Price: £11.75
Ideal 013241 Concord Super Control Knob

Part: 013241

Price: £14.92
Main 5107345 Knob

Part: 5107345

Price: £3.96
Ariston 60081979 Britony Combi Knob

Part: 60081979

Price: £5.95
Baxi 248093 Combi 80 Eco Control Knob

Part: 248093

Price: £5.35
Biasi BI1005503 Riva Prisma Control Knob

Part: BI1005503

Price: £3.96
Halstead Finest Knob Plastic 300656

Part: 300656

Price: £10.56
Ferroli 39801290 Optima Combi Selector Knob

Part: 39801290

Price: £4.50
Main Control Knob Assembly 237879

Part: 237879

Price: £9.98
Baxi 5116069 Duo-Tec Knob

Part: 5116069

Price: £3.96
Halstead 300668 Ace High Control Knob

Part: 300668

Price: £12.14
Ideal 172442 Boxer Control Knob

Part: 172442

Price: £11.35
Baxi 237879 Bermuda LFE Control Knob

Part: 237879

Price: £9.98
Potterton Control Knob Kit 5118397

Part: 5118397

Price: £13.37
Biasi BI1515101 Riva Compact Knob

Part: BI1515101

Price: £3.96
Glowworm S204698 Micron Control Knob

Part: S204698

Price: £6.31
Main Control Knob Assembly 227306

Part: 227306

Price: £8.84
Baxi 5107344 Platinum Knob

Part: 5107344

Price: £4.15
Saunier Duval Control knob C/W clip 2000800400

Part: 2000800400

Price: £8.37
Ariston 997250 On-Off Push Button Kit

Part: 997250

Price: £16.01
Potterton Knob Assembly 960HP/1051

Part: 960HP/1051

Price: £8.86
Saunier Duval Control knob 2000448323

Part: 2000448323

Price: £9.81
Baxi 0350395 Knob

Part: 0350395

Price: £3.96
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