heavy carbon buildup or silica coating from airborne contaminants often necessitates a full replacement

While the RCC-1001 is versatile

This kit is identical to the 14004213-001/U model

It can also indicate a cracked heat exchanger or gas pressure issues

Reznor 43446 Seal Plate heavy carbon buildup or silicaThe Reznor 43446 Seal Plate is a critical OEM replacement component engineered specifically for Reznor HVAC units, including the SC Series and common commercial unit heaters. As a veteran technician knows, maintaining the integrity of the combustion chamber or blower housing depends on a precise fit. This genuine Reznor 43446 plate provides the necessary structural backing and sealing surface to prevent bypass airflow and maintain static pressure