Designed for high-performance circulation

The selector typically connects to terminals 1

maintaining precise timekeeping during line power interruptions without losing the programmed cycle

As a genuine OEM part

though one should always calibrate based on specific damper torque requirements

Nordyne 903478 Heat Exchanger Refrigerant Designed for high-performance circulationThe Nordyne 903478 is a heavy duty, stainless steel heat exchanger engineered specifically for technical compatibility with Nordyne gas furnaces and forced air systems. As a genuine OEM replacement part, this primary heat exchanger ensures precise fitment within the combustion chamber, eliminating the alignment issues common with universal aftermarket components. The upgrade to high grade stainless steel provides significant resistance to thermal