De Dietrich-Thermoelement S101150

The thermocouple is a safety device commonly found in gas boilers and burners, responsible for detecting the presence of a flame. It generates a small voltage when heated, which keeps the gas valve open; if the flame goes out, the thermocouple cools and shuts off the gas supply, preventing leaks. This component is essential for safe operation of gas-fired heating equipment. When your boiler or burner fails to stay lit, a faulty thermocouple is often the culprit. Replacing it is a straightforward repair that restores safety and functionality.