This part is fitted to the older standard efficiency boilers that have a permanent pilot light, they work in a way by making a small electrical charge which activates an electromagnet to open a valve to allow gas or water to go through the system. they are an early way of detecting if there is a flame present. They are made from 2 dissimilar metals that when heated generates a small electrical current that is then sent down to the gas valve to hold in the pilot solenoid on the gas valve allowing the user to let go of the knob.

If the pilot light goes out for any reason the thermocouple cools down, the electrical current decreases allowing the pilot solenoid to drop out. Once the pilot solenoid has dropped out the gas to the burner is extinguished and the boiler is switched off for safety.

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Vaillant 171181 Thermocompact Thermocouple

Part: 171181

Price: £22.09
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Main Medway, Mersey Super, Thames Thermocouple 10/17461

Part: 10/17461

Price: £10.75
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Saunier Duval S202435 Thermocouple

Part: S202435

Price: £10.50
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Main Thermocouple 402905

Part: 402905

Price: £8.95
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Main Thermocouple 243870

Part: 243870

Price: £11.76
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Chaffoteaux 60048839 Flexiflame Thermocouple & Overheat Stat

Part: 60048839

Price: £48.92
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Saunier Duval S202445 Thermocouple

Part: S202445

Price: £10.95
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Potterton Thermocouple 10/13848

Part: 10/13848

Price: £10.75
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Ideal 002937 Concord Thermocouple

Part: 002937

Price: £12.95
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Potterton Thermocouple 2500M120

Part: 2500M120

Price: £4.79
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Main Thermocouple 0549509

Part: 0549509

Price: £11.18
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Baxi 243870 Brazillia Thermocouple

Part: 243870

Price: £11.76
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Ideal 030032 Mexico & Concord Thermocouple

Part: 030032

Price: £8.95
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Glowworm S900002 Flickerflame & Homeglow Thermocouple

Part: S900002

Price: £9.95
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Ideal 002700 Concord & Elan Thermocouple

Part: 002700

Price: £8.95
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Ideal 056249 Concord Thermocouple

Part: 056249

Price: £27.30
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Ideal 003876 Mexico Thermocouple

Part: 003876

Price: £8.95
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Worcester Bosch 87072020180 Thermocouple

Part: 87072020180

Price: £21.05
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Glowworm S202435 Compact Permenant Pilot Thermocouple

Part: S202435

Price: £10.50
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Potterton Thermocouple 0549509

Part: 0549509

Price: £12.12
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Chaffoteaux 60031243 Flexiflame Thermocouple

Part: 60031243

Price: £28.39
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Baxi 232159BAX Solo 2 Thermocouple

Part: 232159BAX

Price: £7.95
0547319
Valor Thermocouple 0547319

Part: 0547319

Price: £13.26
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Main Mersey, Medway Thermocouple 10/13848

Part: 10/13848

Price: £10.75
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Baxi 230677 Arena & Bermuda Thermocouple

Part: 230677

Price: £7.45
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Chaffoteaux 60035083 Corvec Thermocouple

Part: 60035083

Price: £23.60
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Chaffoteaux 60074432 Celt Star Thermocouple

Part: 60074432

Price: £20.74
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Baxi Q309A2788 Thermocouple

Part: Q309A2788

Price: £8.37
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Potterton Thermocouple 243215

Part: 243215

Price: £23.95
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Chaffoteaux 60081394 Flame Supervision Kit

Part: 60081394

Price: £39.92
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Alpha 6.5625660 240 & 280 Thermocouple

Part: 6.5625660

Price: £11.00
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Chaffoteaux 60065964 Challenger Thermocouple

Part: 60065964

Price: £21.84
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Main Thermocouple 226262

Part: 226262

Price: £14.25
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Myson 402905 Housewarmer Thermocouple

Part: 402905

Price: £8.95
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Baxi 5110886 Main Multipoint Thermocouple

Part: 5110886

Price: £52.09
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Chaffoteaux 60028297 Miniflame Thermocouple

Part: 60028297

Price: £40.37
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Potterton Prima Thermocouple 402918

Part: 402918

Price: £8.95
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Glowworm S900000 Fuelsaver Thermocouple

Part: S900000

Price: £8.95
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Saunier Duval S202432 Thermocouple

Part: S202432

Price: £14.88
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Potterton Kingfisher Thermocouple 402905

Part: 402905

Price: £8.95
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Glowworm S202445 Swiftflow Thermocouple

Part: S202445

Price: £10.95
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Potterton 10/17461 Thermocouple

Part: 10/17461

Price: £10.75
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Baxi 243215 Brazillia Thermocouple

Part: 243215

Price: £23.95
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Chaffoteaux 60074723 Celtic Thermocouple & Thermostat

Part: 60074723

Price: £54.60
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Chaffoteaux 60059367 Flexiflame Thermocouple & Overheat Stat

Part: 60059367

Price: £57.89
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Potterton Thermocouple 786/9641

Part: 786/9641

Price: £7.85
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Potterton Thermocouple 225496BAX

Part: 225496BAX

Price: £6.95
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Valor 0549509 Homeflame, Uniflame Thermocouple

Part: 0549509

Price: £12.12
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Potterton Pot5110886 Thermocouple

Part: 5110886

Price: £52.09
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Ideal 173228 Concord Lead For Thermocouple

Part: 173228

Price: £44.62
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