EWC Controls OAS Sensor 318973-401 while designed as a Honeywell

while designed as a Honeywell replacement

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

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

15 Class 250 standards

EWC Controls OAS Sensor 318973-401 while designed as a HoneywellThe 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