Lennox 94W83 Ignition Board 321702-401 System Reliability: Aids in maintaining

System Reliability: Aids in maintaining the correct lubricant balance

The System Sensor D4120 is an industrial-grade 4-wire photoelectric duct smoke detector designed for high-performance smoke detection in HVAC air handling systems

For air differential applications

If your draft inducer pressure switch is failing to close or is fluttering due to a worn diaphragm

This assembly operates on standard 24Vac or 24Vdc power for flexible field wiring

Lennox 94W83 Ignition Board 321702-401 System Reliability: Aids in maintainingAs an experienced HVAC technician, you know that the Lennox 94W83 Ignition Board is a critical OEM replacement part for maintaining system reliability in single stage residential furnaces. This integrated furnace control (IFC) is specifically designed to manage systems utilizing Single Stage PSC Motors and operates within a standard 18 30 VAC range. When troubleshooting a furnace not heating, verifying the 103085 03 sequence is essential, as this