By choosing a genuine Nortek Global HVAC part

Simplified Field Integration: Standardized terminal blocks allow for efficient wiring and faster commissioning during HVAC troubleshooting

this switch ensures the burners cycle off if the internal plenum temperature exceeds safe operational thresholds

6 orifice assembly specifically engineered for use with TE 12 thermostatic expansion valves

06" precision capillary orifice stabilizes needle movement and control response in pressure-sensitive switches

Lochinvar & A.O. Smith 100297134 Flame Sensor 320788-703 By choosing a genuine NortekThe Lochinvar & A. O. Smith 100297134 Flame Sensor is a critical genuine OEM replacement part engineered for precision flame rectification in high efficiency gas fired systems. Designed for use in Lochinvar boilers and A. O. Smith water heaters, this sensor monitors the burner flame to ensure the ignition control module receives a continuous microamp signal. If the flame signal is lost or carries high resistance, the system initiates a safety lockout