---
product_id: 179332206
title: "52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase）"
brand: "pelif"
price: "153 kr"
currency: DKK
in_stock: true
reviews_count: 8
url: https://www.desertcart.dk/products/179332206-52w2901-flame-sensor-for-lennox-furnace-flame-sensor-replaces-52w29
store_origin: DK
region: Denmark
---

# Precision flame detection Exact fit for Lennox & more Easy DIY installation 52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase）

**Brand:** pelif
**Price:** 153 kr
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay warm, stay worry-free — the sensor your furnace deserves!

## Quick Answers

- **What is this?** 52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase） by pelif
- **How much does it cost?** 153 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/179332206-52w2901-flame-sensor-for-lennox-furnace-flame-sensor-replaces-52w29)

## Best For

- pelif enthusiasts

## Why This Product

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

## Key Features

- • **Precision Engineering:** Crafted to exact OEM specs for flawless performance and longevity.
- • **Universal Compatibility:** Fits top furnace models like Lennox G40-G71 series for seamless replacement.
- • **Compact & Durable Design:** 5.3-inch sensor built to withstand high heat and deliver consistent results.
- • **Quick & Easy Installation:** Designed for hassle-free DIY swaps—get your furnace running in no time.
- • **Reliable Flame Monitoring:** Ensures your furnace ignites and stays safely on, preventing costly downtime.

## Overview

The 52W2901 Flame Sensor is a precision-engineered replacement part compatible with Lennox and other leading furnace brands. Measuring approximately 5.3 inches, it detects and monitors the furnace flame to ensure safe ignition and continuous operation. Designed for easy installation and reliable performance, it fits multiple furnace models including G40, G41, G50, G51, G60, G61, and G71 series.

## Description

52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase）

## Features

- MODEL NUMBER: 52W2901 Furnace Flame Sensor.Note: Please check the size before purchas
- EASY TO INSTALL: It is made exactly fit for most top name brands (Lennox, Armstrong & Ducane)
- PART NUMBERS:52W2901, LB47940A, 31L71, 31L7101 - Fits Most Series of Models G40, G41, G50, G51, G60, G61, and G71 Furnaces. For details, see below
- Flame Sensor : 52w2901 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 inches
- ATTENTION: Please consult your machine manual before ordering to make sure the replacement parts are correct

## Product Details

- **Brand:** PELIF
- **Item Weight:** 0.49 Ounces
- **Style:** Modern
- **Measuring Range:** Binary: Present - Absent
- **Mounting Type:** Insert

## Images

![52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase） - Image 1](https://m.media-amazon.com/images/I/51lqBrGY0KL.jpg)
![52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase） - Image 2](https://m.media-amazon.com/images/I/51YGxP+lh1L.jpg)
![52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase） - Image 3](https://m.media-amazon.com/images/I/610jiYcNE3L.jpg)
![52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase） - Image 4](https://m.media-amazon.com/images/I/61nTn1Mwj7L.jpg)
![52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase） - Image 5](https://m.media-amazon.com/images/I/61kA7lR7AnL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works fine
*by L***H on February 24, 2025*

Seems to work fine but usually only lasts one season.

### ⭐⭐⭐⭐⭐ Great Spare Part for Future Use!
*by K***R on March 28, 2025*

Picked this up as a spare for future furnace maintenance. It appears well-built and exactly as described. The price was fair, and delivery was quick-couldn't ask for more. Glad to have it on hand just in case!

### ⭐⭐⭐⭐⭐ I would rather replace than clean
*by M***Y on February 17, 2025*

I would rather replace than clean at this price.

## Frequently Bought Together

- 52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31L71 31L7101 Fits G40 G41 G50 G51 G60 G61 G711（Note: Please Check The Size Before Purchase）
- 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

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-03*