---
product_id: 261981081
title: "52W29 Flame Sensor for Lennox,Ducane,Armstrong Furnaces G40 G41 G50 G51 G60 G61 G71- Replace 52W2901 31L7101 31L71 LB-74940A 28PV41 by TOMOON, Pack of 2"
brand: "tomoon"
price: "$43"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/261981081-52w29-flame-sensor-for-lennox-ducane-armstrong-furnaces-g40-g41
store_origin: NZ
region: New Zealand
---

# 5.3-inch sensing range Precision flame detection Durable, wear-resistant metal 52W29 Flame Sensor for Lennox,Ducane,Armstrong Furnaces G40 G41 G50 G51 G60 G61 G71- Replace 52W2901 31L7101 31L71 LB-74940A 28PV41 by TOMOON, Pack of 2

**Brand:** tomoon
**Price:** $43
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay warm, stay safe — never miss a flame!

## Quick Answers

- **What is this?** 52W29 Flame Sensor for Lennox,Ducane,Armstrong Furnaces G40 G41 G50 G51 G60 G61 G71- Replace 52W2901 31L7101 31L71 LB-74940A 28PV41 by TOMOON, Pack of 2 by tomoon
- **How much does it cost?** $43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/261981081-52w29-flame-sensor-for-lennox-ducane-armstrong-furnaces-g40-g41)

## Best For

- tomoon enthusiasts

## Why This Product

- Trusted tomoon brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety-First Design:** Automatically shuts off gas valve if no flame is detected, protecting your home.
- • **Easy Replacement Pack:** Includes 2 sensors for hassle-free maintenance and peace of mind.
- • **Perfect Compatibility:** Fits Lennox, Ducane, Armstrong furnaces G40-G71 models seamlessly.
- • **Long-Lasting Durability:** Crafted from high-quality metal for extended service life and efficiency.
- • **Reliable Flame Detection:** Ensures safe ignition and continuous monitoring to prevent gas leaks.

## Overview

The TOMOON 52W29 Flame Sensor is a precision-engineered replacement part designed for Lennox, Ducane, and Armstrong furnaces (models G40 through G71). Measuring 5.3 inches, it reliably detects and monitors the furnace flame to ensure safe ignition and operation. Made from durable, wear-resistant metal, this pack of two sensors enhances furnace efficiency and safety by shutting off the gas valve if no flame is detected, preventing dangerous gas leaks.

## Description

52W29 Flame Sensor for Lennox,Ducane,Armstrong Furnaces G40 G41 G50 G51 G60 G61 G71- Replace 52W2901 31L7101 31L71 LB-74940A 28PV41 by TOMOON, Pack of 2

## Features

- SPEC: 52W29 Flame Sensor for Lennox/Armstrong/Ducane Furnace .this flame sensor detects the furnace flame to ensure ignition. It then monitors the flame until the furnace is turned off. The total lenth is approx: 5.3 inch
- PERFECT FIT:The flame sensor monitors the burner to detect whether or not a flame is present. If the flame sensor is defective, the furnace may not heat.Replacement part numbers,52W2901, 52W29, 31L71, LB-74940A, 31L7101, 28PV41.Fits G40, G41, G50, G51, G60, G61, and G71 furnaces
- APPLICATION: The flame sensor senses the furnace flame and ensures that ignition occurs,f the sensor does not detect flame, it shuts the gas valve off, preventing raw gas from dumping into your home
- HIGH QUALITY LONG LASTING: made of high quality durable and wear resistant metal, free from harmful chemicals and tested many times by the manufacturer to be safe for use. Improve the efficiency of the furnace and get a longer service life
- BUY WITH CONFIDENCE: We’re confident in the design and quality of this. For any reason you're not completely satisfied, or you are not sure whether this replacement part correctly fit your appliance, please feel free to contact us or ask a question through desertcart

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | TOMOON |
| Item Weight | 0.01 Kilograms |
| Style | 2 Pack |
| Mounting Type | Flame Mount |
| Output Type | Push-Pull |
| Sensing Distance | 5.3 Inches |
| Specific Uses For Product | Flame detection to ensure ignition |
| UPC | 746939330381 |
| Manufacturer | wsh supplier |
| Part Number | 52W59-2 |
| Item Weight | 0.352 ounces |
| Package Dimensions | 6.02 x 3.27 x 0.63 inches |
| Item model number | 52w29 |
| Size | 2 Pack |
| Item Package Quantity | 1 |
| Included Components | 52W29 Flame Sensor for Lennox |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** TOMOON
- **Item Weight:** 0.01 Kilograms
- **Style:** 2 Pack
- **Mounting Type:** Flame Mount
- **Output Type:** Push-Pull

## Images

![52W29 Flame Sensor for Lennox,Ducane,Armstrong Furnaces G40 G41 G50 G51 G60 G61 G71- Replace 52W2901 31L7101 31L71 LB-74940A 28PV41 by TOMOON, Pack of 2 - Image 1](https://m.media-amazon.com/images/I/51o3PL9MLYL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How does the flame sensor work?**
A: 52W29  flame sensor senses the furnace flame and ensures that ignition occurs,f the sensor does not detect flame, it shuts the gas valve off, preventing raw gas from dumping into your home.

**Q: For which furnace models? How do I determine compatibility?**
A: 52W29 Flame sensor for Lennox/Armstrong/Ducane furnaces. Overall length is approximately: 5.3 in. See our details for specific models or ask us.

**Q: What is the lifespan of this flame sensor?**
A: This flame sensor is made of high quality metal materials to ensure durability and reliability. It typically lasts for several years.

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-24*