the Reznor 258251 DSI Controller Replacement Kit is the industry-standard field fix for igniter control board issues

Is the 8408-028BX compatible with all Bard units

Structural Durability: Galvanized steel construction with a heavy-duty blade and shaft for longevity in high-cycle applications

Most R-410A systems use Polyolester (POE) lubricants

While the burner itself is compatible

Reznor 210855 Limit Switch 320788-704 the Reznor 258251 DSI ControllerThe Reznor 210855 Limit Switch is a critical high limit safety component designed for precise thermal monitoring in commercial unit heaters and air handlers. Engineered as an L240F manual reset limit switch, this device is calibrated to trip at 240F, effectively interrupting the power supply to the heating circuit to prevent unit damage or safety hazards. This specific HVAC high limit control features a 60 inch capillary, providing the necessary reach