Resideo Q390A1103 48" Economy Thermocouple

The Resideo Q390A1103 48” Economy Thermocouple is suitable for fitting in HVAC systems. It detects the presence of a flame and transmits a signal to the gas valve to regulate burner operation. Generally fitted into gas-fired heating systems such as furnaces, boilers and water heaters, the thermocouple switches to break the gas line when there is no flame, increasing safety. Its 48” length makes this thermocouple versatile in its installation and enhances efficiency while reducing the risk of gas leaks and increasing the life of HVAC systems.