The Lennox 18G89 Flame Sensor is a critical OEM replacement part designed to maintain the safety and operational integrity of residential and commercial gas furnaces

Secure Terminals: Standardized #6-32 screw connections eliminate loose connections and simplify wiring in tight control cabinets

When performing annual maintenance or replacing an ignitor

s operating state

The forged brass construction effectively eliminates the risk of stress cracking under high-pressure cycles

Functional Devices RIBU1C-RD Relay The Lennox 18G89 Flame SensorThe Functional Devices RIBU1C RD is a professional grade enclosed pilot relay engineered for versatile control in building automation and HVAC systems. This 10 Amp SPDT relay features a multi voltage coil, accepting 10 30 VAC DC or 120 VAC, which eliminates the need for multiple stocking units on the truck. Encased in a durable NEMA 1 rated red housing, this unit is specifically designed for quick identification in fire alarm and emergency safety