Common Questions What is the difference between the Series 193 and Series 194

and required gaskets for a professional-grade replacement

This HVAC compression fitting is built for high-demand environments

The heavy-duty plated steel frame and laser-welded bellows contribute to an extended service life by resisting mechanical fatigue

Lennox 74W03 Ignition Control 326058-758 Common Questions What is theThe Lennox 74W03 Ignition Control is a critical OEM replacement component engineered for single stage Elite series gas furnaces. This direct spark ignition module (also compatible with specific hot surface ignition setups depending on the revision) serves as the primary controller for combustion sequences, managing the gas valve, inducer motor, and flame rectification process. Operating on a standard 24VAC control circuit, the 103098 01 board features