EWC Controls OAS Sensor 318973-401 Key Technical Benefits Optimized Ignition

Key Technical Benefits Optimized Ignition Geometry: Precise probe alignment ensures a consistent spark path for rapid gas ignition

While these units have secondary adjustment screws

Key Benefits Direct OEM Interchange: Replaces Lennox 25G2201 and KA55HXGMR-7873 with identical electrical specs and physical dimensions

Ensure proper HVACR troubleshooting by verifying York furnace part compatibility with your specific model number before installation to maintain factory-spec safety parameters and efficiency

The unit typically operates on a standard 24VAC/DC power source

EWC Controls OAS Sensor 318973-401 Key Technical Benefits Optimized IgnitionThe EWC Controls OAS Sensor is a critical 10k ohm thermistor designed for real time outdoor air temperature monitoring in zoned HVAC applications. Engineeerd for seamless integration with EWC Ultra Zone systems, this outdoor air sensor provides the essential data required for automatic changeover in dual fuel heat pump setups and multi stage heating systems. By replacing bulky mechanical thermostats, the OASEWC enables precise control of supplemental