---
product_id: 20189309
title: "Lennox 74L57 Gas Fireplace Thermocouple"
brand: "lenox"
price: "€ 20.46"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/20189309-lennox-74l57-gas-fireplace-thermocouple
store_origin: HR
region: Croatia
---

# 2000W heat output Precision gas control Easy aftermarket replacement Lennox 74L57 Gas Fireplace Thermocouple

**Brand:** lenox
**Price:** € 20.46
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your fireplace game with precision and power!

## Quick Answers

- **What is this?** Lennox 74L57 Gas Fireplace Thermocouple by lenox
- **How much does it cost?** € 20.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/20189309-lennox-74l57-gas-fireplace-thermocouple)

## Best For

- lenox enthusiasts

## Why This Product

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

## Key Features

- • **Durable Build:** Crafted by Lennox with a limited warranty for peace of mind
- • **Trusted Replacement:** 90-day replacement warranty keeps your fireplace running flawlessly
- • **Reliable Heat Control:** Ensures consistent 2000W warmth for cozy indoor comfort
- • **Seamless Installation:** Freestanding design with smooth finish fits classic fireplaces effortlessly
- • **Fuel-Powered Efficiency:** Operates without batteries, powered directly by your gas supply

## Overview

The Lennox 74L57 Gas Fireplace Thermocouple is a high-quality, fuel-powered replacement part designed for classic indoor gas fireplaces. Delivering 2000 watts of heat output, it features a smooth finish and freestanding installation. Backed by a limited warranty and a 90-day replacement guarantee, this precision thermocouple ensures reliable and efficient fireplace operation without the need for batteries.

## Description

Lennox 74L57 Gas Fireplace Thermocouple

## Features

- Quality aftermarket replacement
- 90 day replacement warrantee

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Lenox |
| Power Source | Fuel Powered |
| Finish Type | Smooth |
| Installation Type | Freestanding |
| Heat Output | 2000 Watts |
| Style | Classic |
| Ventilation Type | External Venting |
| Specific Uses For Product | Indoor |
| Item Weight | 0.01 Ounces |
| Model Name | Lennox Gas SIT Thermocouple |
| Warranty Type | Limited |
| Burner type | Gas |
| UPC | 733353710424 |
| Manufacturer | Lennox |
| Part Number | 3710424 |
| Item Weight | 0.01 ounces |
| Product Dimensions | 8 x 1 x 6 inches |
| Item model number | 74L57 |
| Is Discontinued By Manufacturer | No |
| Finish | Smooth |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Lenox
- **Power Source:** Fuel Powered
- **Finish Type:** Smooth
- **Installation Type:** Freestanding
- **Heat Output:** 2000 Watts
- **Style:** Classic
- **Ventilation Type:** External Venting
- **Specific Uses For Product:** Indoor
- **Item Weight:** 0.01 Ounces
- **Model Name:** Lennox Gas SIT Thermocouple

## Images

![Lennox 74L57 Gas Fireplace Thermocouple - Image 1](https://m.media-amazon.com/images/I/418K4NlndjL.jpg)

## Questions & Answers

**Q: What size are the threads ?  I'm looking for M8:1 at the top and  M10:1 at the tip**
A: These are 11/32 fine thread. You need metric course thread.

**Q: This looks like the thermocouple i just took out of my lennox hearth products shoreline model srh 40 but it is not listed on your compatablity list?**
A: It should be a good replacement.

**Q: Does it work for model edpfnm-2**
A: not now

**Q: Will this work on a superior ssdvr-3530cnm?**
A: Yes, this is the thermocouple for that unit.

---

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**Shop now:** [https://www.desertcart.hr/products/20189309-lennox-74l57-gas-fireplace-thermocouple](https://www.desertcart.hr/products/20189309-lennox-74l57-gas-fireplace-thermocouple)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-25*