---
product_id: 10644951
title: "US Merchant 24\" Thermopile"
brand: "fixitshop"
price: "HK$176"
currency: HKD
in_stock: true
reviews_count: 8
url: https://www.desertcart.hk/products/10644951-us-merchant-24-thermopile
store_origin: HK
region: Hong Kong
---

# Fits 24" systems 90% replacement guarantee Compatible with MV heating US Merchant 24" Thermopile

**Brand:** fixitshop
**Price:** HK$176
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep the heat on with confidence!

## Quick Answers

- **What is this?** US Merchant 24" Thermopile by fixitshop
- **How much does it cost?** HK$176 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/10644951-us-merchant-24-thermopile)

## Best For

- fixitshop enthusiasts

## Why This Product

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

## Key Features

- • **Universal Fit:** Designed to seamlessly integrate with various MV heating systems.
- • **Quality Assurance:** Trust in US Merchant's reputation for durable and dependable parts.
- • **Enhanced Efficiency:** Maximize your heating system's performance with this essential component.
- • **Reliable Replacement:** Enjoy peace of mind with a 90% replacement guarantee.
- • **Professional Installation Recommended:** Ensure optimal performance by having a licensed serviceman handle the installation.

## Overview

The US Merchant 24" Thermopile is a high-quality replacement part designed to fit many MV heating systems, ensuring reliable performance and efficiency. With a 90% replacement guarantee, it’s the perfect choice for those looking to maintain their heating systems with professional-grade components.

## Description

US Merchant 24" Thermopile

## Features

- 90 replacement guarantee
- Will fit many MV heating systems
- Its always best to have a licensed serviceman or gas company replace this part.
- US-Merchant replacement part.

## Images

![US Merchant 24" Thermopile - Image 1](https://m.media-amazon.com/images/I/51y-V+vJxaL.jpg)

## Questions & Answers

**Q: Will this work in a kingsman fdv350 oem part# 1000-p136wr?**
A: If it is long enough. My cheat sheet recommends a 30", but a 24" will usually fit units of this type. Measure your old one. The only differences are the mounting hardware and the length!

**Q: normal volt readings  for this thermopile?**
A: I don't remember measuring it, but it worked.  Usually the biggest factor affecting the thermopile out put is the intensity of the pilot impingement.  The same thermopile can produce anywhere from 300 to 750 millivolts depending on the intensity of pilot impingement.

**Q: does this fit a williams wall heater?**
A: Sorry, but I do not have the list of products that will accept this thermopile.  I used it for a gas log fireplace unit.

**Q: how many volts does this thermopile generate?**
A: all thermopiles generate .750 volts not connected to anything, and .500 when under load.  (750 and 500 'millivolts' respectively)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fire place fixed
*by T***K on December 22, 2022*

This fit into our fireplace insert no problem easy to install. So far working good not sure about the longevity but it seems pretty well built. At these price point I ordered two to keep a spare on hand. If this fails prematurely I will update my review so far one month in 11-2022 and the fireplace fires right up no issues.

### ⭐⭐⭐⭐⭐ Good replacement for heatilator GCDC80
*by T***N on February 11, 2021*

Works like a charm. Good price for thermopile replacement on a Heatilator GCDC80 fire place. Getting it installed was a bit of a pain due to how the fireplace was built but it works and i have a functioning fireplace again

### ⭐⭐⭐⭐ Difficult and tedious to take apart gas firplace due to my inexperience(never ...
*by J***R on December 5, 2016*

Difficult and tedious to take apart gas firplace due to my inexperience(never done it b-4) but to my jow when it was all put back together it worked and it works well, my whole family is pleased to have the gf back online.

## Frequently Bought Together

- Fixitshop US Merchant 24" Thermopile
- Heat N Glo Thermocouple For Heat And Glo And Hearth & Home Fire Places
- US Merchant Heatilator Heatnglo Direct Vent Fireplace 27" Thermocouple replaces Robertshaw 446-511

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**Shop now:** [https://www.desertcart.hk/products/10644951-us-merchant-24-thermopile](https://www.desertcart.hk/products/10644951-us-merchant-24-thermopile)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-03*