You must always use the reset type specified by the manufacturer

The 21L99 features an L-shaped rod construction with high-temperature porcelain insulation to prevent grounding issues

this resistance heating element provides the structural integrity and thermal performance expected in demanding residential and light commercial applications

To prevent premature ignitor failure

protecting sensitive solid-state components from erratic power delivery in demanding residential and commercial applications

Modine 5H0796360000 Ignitor You must always use theThe Modine 5H0796360000 Ignitor is a genuine OEM DSI ignitor designed for precision and reliability in gas fired heating systems. As the direct replacement for 5H79636, this Modine furnace spark igniter is essential for maintaining the sequence of operation in unit heaters, ensuring a consistent arc for fuel ignition. Built to withstand high cycle environments, this Direct Spark Ignition (DSI) electrode integrates seamlessly with your existing Modine