121-711

This premium mercury flame sensor is a critical safety component designed for gas-fired heating systems and residential furnaces. Functioning as a high-reliability flame proving device, it monitors the pilot or burner flame to ensure safe operation. When the sensor detects heat from the flame, it allows the gas valve to remain open; if the flame is extinguished, the sensor signals the system to shut off the fuel supply, preventing hazardous gas buildup. This replacement part is essential for HVAC maintenance, especially when troubleshooting furnace ignition failures, short-cycling, or intermittent heating issues. Built for durability in high-temperature environments, it ensures your heating equipment remains efficient and compliant with safety standards.
Type: Flame Sensor Rods
Size: Standard
Application: Used in residential gas furnaces and HVAC heating units as a safety shut-off and flame verification mechanism.
Specifications: Mercury-actuated safety switch, heat-resistant sensing rod, designed for high-temperature furnace environments.