Lennox 18g8901 furnace flame sensor rod — oem replacement 18g89

Lennox 18G8901 Furnace Flame Sensor Rod — OEM Replacement 18G89

SKU: 18G8901

$65.00
Stock: 1 unit

Description

  • The OEM Lennox 18G8901 Furnace Flame Sensor Rod is a critical, factory-authorized safety component engineered to supervise core gas burner ignition cycles inside Lennox and Armstrong residential heating units.
  • Expertly fabricated with a premium Kanthal D alloy electrode core secured within a glazed L-5 steatite ceramic insulator body, this high-durability straight sensor rod registers active burner flame ionization, converting the heat into a precise microamp electrical signal that tells the central control board it is safe to maintain gas delivery.
  • Over time, original flame rods gather carbon scale deposits that trigger short-cycling or immediate 3-flash system safety lockouts. The 18G8901 provides a seamless, drop-in replacement that restores automated burner tracing and preserves full system safety compliance.

Specifications

Manufacturer / Brand

Lennox

Manufacturer Part Number / SKU

18G8901

UPC

662551105949

ASIN

B0BM6M1NQY

Product Line / Series

Genuine OEM Heating Replacement Parts

Total Component Length

3-1/8 Inches (approx. 7.93 cm)

Exposed Sensor Rod Length

3/4 Inch straight profile

Popular Compatible Equipment Models

Perfectly drops into prominent vintage and active legacy Lennox models starting with G11E, G12E, G16, G16R, G17, G17R, G20, G20R, G23, GSC10, LD20, LF20, and 78RGF series platforms.