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Lennox LB-112237A Hot Surface Ignitor Assembly, 95 VAC | 19W61/75M21 Specs

Lennox LB-112237A Hot Surface Ignitor Assembly, 95 VAC | 19W61/75M21 Specs

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Regular price $125.99 USD
Regular price Sale price $125.99 USD
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High-Level Highlights

  • Genuine OEM Quality: Authentic Lennox replacement part

  • Advanced Silicon Nitride: Durable ceramic construction

  • 95 VAC High-Efficiency Design: Specifically engineered for Lennox

  • Includes the 1.25" element, ceramic base, and 12-inch wiring lead with a 2-pin AMP plug for easy install.

  • Replaces Lennox part numbers 19W61, 75M21, and LB-47175D

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Specifications

Product Details & Specifications

  • Brand: Lennox
  • Part Type: Hot Surface Ignitor (HSI)
  • Material: Silicon Nitride
  • Nominal Voltage: 95 VAC
  • Amperage (AMPs): 0.34/0.9A
  • Wattage: 19W
  • Ignitor Length: 1.25 inches
  • Lead Length: 12 inches (approx.)
  • Connection Style: 2-Pin AMP connector
  • Warm-up Time: 20 seconds (approx.)
  • Gross Shipping Weight: 1 LB

description

Lennox LB-112237A Hot Surface Ignitor Assembly, 95 VAC | 19W61/75M21 Specs


This is a Genuine Original Equipment Manufacturer (OEM) Lennox part designed to provide reliable ignition in gas furnace systems. The hot surface ignitor (HSI) uses electricity to heat a silicon nitride element to a temperature sufficient to ignite the gas burner, ensuring safe and efficient furnace start-up.


Key Features and Function:

  • OEM Fit & Function: As a genuine Lennox part, it is engineered to exact specifications, ensuring a direct fit and optimal performance in compatible units.
  • High-Quality Material: Made of durable silicon nitride and aluminum oxide ceramics for superior heat resistance and an extended service life.
  • Reliable Ignition: Ensures fast, consistent, and safe ignition, which in turn reduces wait time for heating and prevents nuisance faults in the control system.
  • Easy Installation: Designed with a standard two-pin AMP connector and factory wiring harness for straightforward, tool-free installation into existing systems.


Product Details & Specifications

  • Brand: Lennox
  • Part Type: Hot Surface Ignitor (HSI)
  • Material: Silicon Nitride
  • Nominal Voltage: 95 VAC
  • Amperage (AMPs): 0.34/0.9A
  • Wattage: 19W
  • Ignitor Length: 1.25 inches
  • Lead Length: 12 inches (approx.)
  • Connection Style: 2-Pin AMP connector
  • Warm-up Time: 20 seconds (approx.)
  • Gross Shipping Weight: 1 LB


🛠️ HVAC Depot Pro Tip: Handle with Care

To prevent premature failure of your new hot surface ignitor, always handle it by the white ceramic base only, and avoid touching the gray/black silicon carbide ignitor element itself. Oils from the skin can create hot spots on the element, leading to early failure. Always turn off the power at the circuit breaker before installation.


Cross-Reference

This part number has several cross-references for various brands and revisions:

  • Superseded/Current P/N: 19W61 (Current Lennox Catalog Number)
  • Legacy P/Ns: LB-112237A, LB112237A, 19W6101
  • Alternate/Vendor P/Ns: 75M21, 75M2101, LXT-01A, 100536-01, LB-47175D
  • Drawing Numbers: 1220-481430, T002698844


Extensive Model Compatibility List:

Note: Use 'CTRL+F' to search for your specific model:


Lennox G40 Series (Standard Efficiency Upflow/Horizontal):

  • G40DF-24, G40DF-36, G40DF-48, G40DF-60
  • G40UH-36, G40UH-48, G40UH-60


Lennox G43 Series (Standard Efficiency Downflow):

  • G43DF-24, G43DF-36, G43DF-48, G43DF-60
  • G43UH-36, G43UH-48, G43UH-60


Lennox G60 Series (Two-Stage Variable Speed):

  • G60UH-36, G60UH-48, G60UH-60
  • G60UH-72, G60UH-90, G60UH-120


Lennox G61 Series (High Efficiency Single-Stage):

  • G61MP-36, G61MP-48, G61MP-60
  • G61MP-72, G61MP-90, G61MP-120


Lennox G71 Series (High Efficiency Modulating):

  • G71MPP-36, G71MPP-48, G71MPP-60
  • G71MPP-72, G71MPP-90, G71MPP-120

Specification

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Last Updated: June 2026

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We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

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Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

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Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

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HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Celest G.
Verified Customer
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