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The 21642 is the primary HSG 400 replacement part and is also utilized in Blue Angel and Blue Angel Plus gas conversion burners
Hardened Construction: Lightweight aluminum body reduces strain on copper or black iron piping while maintaining structural integrity
reducing diagnostic time during field service
a failing run capacitor or seized bearings are the culprits
Heil Quaker ICP 24376701 Flame Sensor 318820-201 The 21642 is the primaryThe Heil Quaker ICP 24376701 Flame Sensor is a vital OEM component engineered for precise flame rectification in high efficiency gas furnaces. As a veteran technician, you know that a carbon coated or oxidized furnace flame sensor is the primary cause of short cycling and "no heat" calls. This hot surface ignition (HSI) flame sensor monitors the burner assembly, sending a microamp signal back to the integrated furnace control (IFC) to confirm
