A reading below 350mV typically indicates a failing thermopile

Once the system cools to the 210°F reset point

The Reznor 210764 Switch is built for the demanding conditions of industrial and commercial heating applications

Adjustable defrost cycle timing pins allow for site-specific performance tuning

Standardized Housing: Utilizes a universal 3/4-inch thermal disc configuration for fast mounting on the plenum or inducer housing

Nordyne 903422 Heat Exchanger 323613-751 A reading below 350mV typicallyThe Nordyne 903422 Heat Exchanger is an essential OEM replacement component engineered for high efficiency thermal transfer in residential and light commercial forced air systems. As a veteran preferred HVAC furnace part, this aluminized steel assembly is designed to withstand the rigorous thermal cycling of modern heating duty cycles, providing superior corrosion resistance. This gas heat exchanger serves as the critical safety barrier between