Precision Engineering: Balanced impeller and housing design reduce vibration and noise during heating system operation

ensure the White/Blue wires are connected to a common point for proper operation

or condensate drain lines that could otherwise lead to dangerous back-drafting

allowing for continuous air venting through the bucket vent

Sterling HVAC 11J28R06881 Control/Ignition Board Freon Precision Engineering: Balanced impeller andThe Sterling HVAC 11J28R06881 Control Ignition Board is the current OEM replacement engineered for Direct Spark Ignition (DSI) operation in Sterling and Beacon Morris gas fired unit heaters. Functionally identical to the legacy J28R06881, this updated controller is optimized specifically for heating only applications, having eliminated the unnecessary cooling relay found on older universal boards to streamline HVAC system reliability. Designed as a