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

professional aesthetic

it meets ASTM B483 standards

Thermal Stability: Constructed from high-grade materials to withstand the temperature fluctuations common in intensive hydronic heating applications

Thermal Stability: Features high heat resistance properties to prevent degradation in high-limit steam environments

Reznor 43446 Seal Plate It can also indicate aThe 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