the Armstrong Furnace R06428D426 Draft Blower (Model ACOMB605-1) is the OEM-spec solution required for a proper repair

This model features 1 3/8" ODF (Outside Diameter Female) copper connections

This 3/4 HP variable speed motor utilizes ECM X-13 Endura Pro technology to maintain constant airflow against varying static pressures

Confirm the sensor is receiving the correct DC voltage from the control board

Measurement for B-section belts is typically taken as use-length or outside circumference

Auburn E5-399N-2PK Electrode 323613-751 the Armstrong Furnace R06428D426 DraftThe Auburn E5 399N 2PK Electrode is a high performance Mid Continent Electrode designed for reliable industrial ignition and flame sensing. This essential HVACR replacement part is the direct successor to the original E5 399N model, now conveniently offered as a Package of 2 pcs to ensure you have a backup on hand. Engineered by Auburn Ignition Products, these boiler electrodes feature a 3 9 16" length with a 1" insulator, providing precise fitment