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.

Potterton Thermocouple 230677

Part: 230677

Price: £7.45
Main Thermocouple 402918

Part: 402918

Price: £8.95
Main Thermocouple 786/9641

Part: 786/9641

Price: £7.85
Ferroli 39801490 Optima 900 Thermocouple

Part: 39801490

Price: £18.38
Chaffoteaux 60031243 Flexiflame Thermocouple

Part: 60031243

Price: £28.39
Ideal 003876 Mexico Thermocouple

Part: 003876

Price: £8.95
Ideal 056249 Concord Thermocouple

Part: 056249

Price: £27.30
Chaffoteaux 60057703 Flexiflue Thermocouple

Part: 60057703

Price: £29.81
Potterton Thermocouple 242157BAX

Part: 242157BAX

Price: £13.39
Ferroli 36702070 Optima Thermocouple

Part: 36702070

Price: £9.00
Glowworm S900001 Hideaway Thermocouple

Part: S900001

Price: £12.75
Potterton Thermocouple Nut 092136

Part: 092136

Price: £6.35
Ideal 004058 Elan & Mexico Thermocouple

Part: 004058

Price: £16.49
Ariston 60031243 Maxiflame Thermocouple

Part: 60031243

Price: £28.39
Thorn Apollo Thermocouple 102005

Part: 102005

Price: £8.95
Potterton Thermocouple 243644

Part: 243644

Price: £10.45
Chaffoteaux 60035083 Corvec Thermocouple

Part: 60035083

Price: £23.60
Main Mersey, Medway Thermocouple 10/13848

Part: 10/13848

Price: £10.75
Halstead 500517 Best Quattro Thermocouple

Part: 500517

Price: £12.00
Glowworm S900004 Fireblaze Thermocouple

Part: S900004

Price: £7.98
Myson Apollo Thermocouple 102005

Part: 102005

Price: £8.95
Ravenheat 5012076 Thermocouple

Part: 5012076

Price: £24.59
Potterton Thermocouple 786/9641

Part: 786/9641

Price: £7.85
Potterton Thermocouple 2500M120

Part: 2500M120

Price: £4.79
Potterton Thermocouple 225496BAX

Part: 225496BAX

Price: £9.45
Baxi 102005 Bermuda Thermocouple

Part: 102005

Price: £8.95
Baxi 786/9641 Thermocouple

Part: 786/9641

Price: £7.85
Alpha 6.5625660 240 & 280 Thermocouple

Part: 6.5625660

Price: £11.00
Potterton Thermocouple 0549509

Part: 0549509

Price: £12.12
Baxi 225496 Solo Thermocouple

Part: 225496

Price: £6.95
Baxi 232159BAX Solo 2 Thermocouple

Part: 232159BAX

Price: £7.95
Potterton 5110886 Thermocouple

Part: 5110886

Price: £52.09
Potterton Prima Thermocouple 402918

Part: 402918

Price: £8.95
Baxi 225496BAX Solo Wm Rs Thermocouple

Part: 225496BAX

Price: £9.45
Main Thermocouple 402905

Part: 402905

Price: £8.95
Potterton Thermocouple 243215

Part: 243215

Price: £23.95
Main Thermocouple 226262

Part: 226262

Price: £14.25
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