Nordyne 624689R Interface Module 326070-701 the 104939-01 assembly typically includes

the 104939-01 assembly typically includes the necessary gasket and hardware to facilitate a leak-free installation

Verify 24V across the bottom heater terminals

or worn bimetal contacts after years of service

High-voltage interference can cause erratic modulation or terminal damage to the electronic amplifier

the main burner refusing to engage on the second stage

Nordyne 624689R Interface Module 326070-701 the 104939-01 assembly typically includesThe Nordyne 624689R Interface Module is a critical replacement component engineered for precise communication between the thermostat and the integrated furnace control board in specific Miller and Intertherm gas furnaces. This OEM interface board is designed to manage the ignition sequence and blower timing, ensuring the heating system operates within factory specifications. As a direct fit Nordyne replacement part, it addresses common diagnostic