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.

Ferroli 39801490 Optima 900 Thermocouple

Part: 39801490

Price: £18.38
Glowworm S202445 Swiftflow Thermocouple

Part: S202445

Price: £10.95
Chaffoteaux 60028297 Miniflame Thermocouple

Part: 60028297

Price: £40.37
Saunier Duval S202435 Thermocouple

Part: S202435

Price: £10.50
Main Thermocouple 402918

Part: 402918

Price: £8.95
Vaillant 171125 Mag Sine Thermocouple

Part: 171125

Price: £16.81
Main Thermocouple 0549509

Part: 0549509

Price: £11.18
Main Thermocouple 402S2460

Part: 402S2460

Price: £6.64
Potterton Thermocouple 243215

Part: 243215

Price: £23.95
Myson 402905 Housewarmer Thermocouple

Part: 402905

Price: £8.95
Baxi 226262 Ebony & Gasflame Thermocouple

Part: 226262

Price: £14.25
Potterton Thermocouple 225496BAX

Part: 225496BAX

Price: £6.95
Potterton Thermocouple 226262

Part: 226262

Price: £14.25
Thorn Apollo Thermocouple 102005

Part: 102005

Price: £8.95
Valor Thermocouple 0547319

Part: 0547319

Price: £13.26
Baxi 225496BAX Solo Wm Rs Thermocouple

Part: 225496BAX

Price: £6.95
Glowworm S202432 Spacesaver Thermocouple

Part: S202432

Price: £14.88
Ariston Thermocouple 60057703

Part: 60057703

Price: £29.81
Chaffoteaux 60031243 Flexiflame Thermocouple

Part: 60031243

Price: £28.39
Potterton Thermocouple 10/13848

Part: 10/13848

Price: £10.75
Saunier Duval S202432 Thermocouple

Part: S202432

Price: £14.88
Baxi 225496 Solo Thermocouple

Part: 225496

Price: £6.95
Potterton Thermocouple 242157BAX

Part: 242157BAX

Price: £13.39
Potterton Thermocouple Nut 092136

Part: 092136

Price: £6.35
Main Thermocouple 786/9641

Part: 786/9641

Price: £7.85
Chaffoteaux 60057703 Flexiflue Thermocouple

Part: 60057703

Price: £29.81
Potterton 5110886 Thermocouple

Part: 5110886

Price: £52.09
Main Thermocouple 2500M120

Part: 2500M120

Price: £4.79
Potterton Thermocouple 243644

Part: 243644

Price: £10.45
Baxi 232159BAX Solo 2 Thermocouple

Part: 232159BAX

Price: £7.95
Potterton Thermocouple 0549509

Part: 0549509

Price: £12.12
Potterton Thermocouple 786/9641

Part: 786/9641

Price: £7.85
Main Thermocouple 5110886

Part: 5110886

Price: £52.09
Main Thermocouple 226262

Part: 226262

Price: £14.25
Potterton Thermocouple 402S2460

Part: 402S2460

Price: £6.64
Potterton Thermocouple 230677

Part: 230677

Price: £7.45
Ariston 60031243 Maxiflame Thermocouple

Part: 60031243

Price: £28.39
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