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A thermocouple is a critical safety component in gas-fired heating equipment, responsible for detecting the pilot flame and ensuring the gas valve remains open only when a flame is present. This essential boiler spare part helps prevent gas leaks and potential hazards by generating a small electrical current when heated by the pilot light. If your boiler's pilot light keeps going out or the burner fails to stay lit, a faulty thermocouple is often the culprit. Designed for reliable performance in various heating systems, this component is a straightforward replacement that can restore safe operation. Whether you are performing routine boiler maintenance or troubleshooting an intermittent pilot issue, this thermocouple is a key part for ensuring your system runs safely and efficiently. Compatible with many gas boilers and heaters, it is a common spare part for technicians and DIY enthusiasts alike.