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.

Alpha 1.014054 CB CD Selector Knob

Part: 1.014054

Price: £4.35
Vokera 1860 Linea Mode Selector Knob

Part: 1860

Price: £4.00
Glowworm 2000448323 Ember Control Knob

Part: 2000448323

Price: £10.79
Baxi 5116069 Duo-Tec Knob

Part: 5116069

Price: £3.96
Main Control Knob Assembly 092020

Part: 092020

Price: £13.43
Ferroli 39805750 Domina Control Knob

Part: 39805750

Price: £4.49
Biasi BI1605106 Riva Compact Knob

Part: BI1605106

Price: £4.14
Baxi 248093 Combi 80 Eco Control Knob

Part: 248093

Price: £5.35
Baxi 230282BAX Bermuda Adaptor Knob

Part: 230282BAX

Price: £21.57
Ariston 60074470 Knob

Part: 60074470

Price: £4.35
Ferroli 39812280 Optimax Control Knob

Part: 39812280

Price: £39.67
Ariston 65100687 Microgenus Knob

Part: 65100687

Price: £4.35
Potterton Knob Selector Switch 5116069

Part: 5116069

Price: £3.96
Vaillant Knob - 143940

Part: 143940

Price: £7.02
Chaffoteaux 998603 Knob

Part: 998603

Price: £7.23
Ferroli 35003010 Optima Knob

Part: 35003010

Price: £4.59
Ariston 998603 Microgenus Control Knob

Part: 998603

Price: £7.23
Main Knob Selector Switch 5116069

Part: 5116069

Price: £3.96
Ideal 172554 Mini Control Knob

Part: 172554

Price: £3.96
Chaffoteaux 992027 Knob

Part: 992027

Price: £4.35
Vaillant Knob - 143992

Part: 143992

Price: £5.83
Potterton Control Knob Selector 005409681

Part: 005409681

Price: £5.14
Baxi 230276BAX Bermuda Adaptor Knob

Part: 230276BAX

Price: £10.30
Ideal 170859 Concord Control Knob

Part: 170859

Price: £14.86
Vaillant Knob - 078543

Part: 078543

Price: £21.92
Biasi BI1005502 Riva Prisma Control Knob

Part: BI1005502

Price: £3.96
Potterton 0350395 Knob

Part: 0350395

Price: £3.96
Glowworm 2000800400 Ultimate Control Knob

Part: 2000800400

Price: £8.54
Main Control Knob 5118397

Part: 5118397

Price: £13.37
Vaillant Knob - 114276

Part: 114276

Price: £6.50
Potterton Knob 5110845

Part: 5110845

Price: £13.52
Glowworm S204698 Micron Control Knob

Part: S204698

Price: £6.44
Saunier Duval Control knob 801758

Part: 801758

Price: £13.24
Baxi Control Knob 7223383

Part: 7223383

Price: £5.36
Vaillant Buttons Grey, Kit Of 3 0020048969

Part: 0020048969

Price: £12.97
Ariston 61016290 Knob

Part: 61016290

Price: £5.91
Halstead 300525 Best Wickes Knob

Part: 300525

Price: £9.27
Glowworm S205146 Micron Control Knob

Part: S205146

Price: £6.57
Vaillant Knob (Kit) - 114285

Part: 114285

Price: £9.99
Saunier Duval S427524 Control Knob

Part: S427524

Price: £12.61
Potterton Control Knob Assembly 234551

Part: 234551

Price: £11.48
Chaffoteaux 61010740 Calydra Knob

Part: 61010740

Price: £4.35
Worcester Bosch 87161410210 CDI Selector Knob

Part: 87161410210

Price: £4.70
Potterton Control Knob 0544659

Part: 0544659

Price: £14.03
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