AERCO 123970 Flame Sensor 318973-401 as the probe requires a

as the probe requires a metal-to-metal ground to function

Using it on smaller units may cause misalignment

maximizing the AFUE rating of the HVAC system

as per updated technical bulletins to ensure proper fault detection and safety compliance

For manual overrides or system testing

AERCO 123970 Flame Sensor 318973-401 as the probe requires aThe AERCO 123970 Flame Sensor is a critical safety component engineered for precision flame detection in high performance heating systems. Specifically designed for use in AERCO Benchmark boilers and Innovation series water heaters, this flame rod utilizes flame rectification technology to monitor the combustion process. By providing instantaneous flame sensing, the 123970 ensures that the gas valve remains open only when a consistent ignition is