Heil Quaker ICP 24376701 Flame Sensor 318820-201 a failing run capacitor or

a failing run capacitor or seized bearings are the culprits

They are functionally identical units used for standard field testing applications

and HN72AZ301

Always verify that the WC rating and contact state match the manufacturer's original requirements

The 21642 is the primary HSG 400 replacement part and is also utilized in Blue Angel and Blue Angel Plus gas conversion burners

Heil Quaker ICP 24376701 Flame Sensor 318820-201 a failing run capacitor orThe 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