--- product_id: 406921207 title: "24\" Thermopile by Heatilator" brand: "fixitshop" price: "£25.53" currency: GBP in_stock: true reviews_count: 5 category: "Fixitshop" url: https://www.desertcart.co.uk/products/406921207-24-thermopile-by-heatilator store_origin: GB region: United Kingdom --- # 24-inch precision length Compatible with many MV heating systems Lightweight 41g design 24" Thermopile by Heatilator **Brand:** fixitshop **Price:** £25.53 **Availability:** ✅ In Stock ## Summary > 🔥 Upgrade your heat game with precision and peace of mind! ⚙️ ## Quick Answers - **What is this?** 24" Thermopile by Heatilator by fixitshop - **How much does it cost?** £25.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/406921207-24-thermopile-by-heatilator) ## 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 - • **Compact & Lightweight:** At just 41 grams, it’s engineered for easy installation without bulk or weight concerns. - • **Reliable Heat Sensing:** Delivers consistent thermal performance to keep your fireplace firing up smoothly every time. - • **Precision Fit for MV Systems:** Seamlessly integrates with a wide range of millivolt heating units for hassle-free upgrades. - • **Spare on Hand, Peace of Mind:** Affordable enough to keep a backup ready—never get caught off guard by unexpected failures. - • **Licensed Installation Recommended:** Ensures safety and optimal performance when installed by certified professionals. ## Overview The 24" Thermopile by Heatilator is a lightweight, 41-gram thermal sensor designed for millivolt heating systems. It offers reliable heat detection and fits many MV units, making it an essential upgrade or replacement part. Backed by positive user reviews and engineered for easy installation, it’s a smart choice for professionals and homeowners seeking dependable fireplace performance. ## Description International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Review: Pour un foyer Tierra 2 heat and glo c’est excellent! Review: 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. ## Features - 90 ************************************************************* ************************************************************* - Will fit many MV heating systems - Its always best to have a licensed serviceman or gas company ************************************************************* this part. - US-Merchant ************************************************************* part. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00MU5O59A | | Brand | Fixitshop | | Customer Reviews | 4.2 4.2 out of 5 stars (277) | | Date First Available | 14 Sept. 2014 | | Item Weight | 41 g | | Model Number | 2103-512 | | Package Dimensions | 11.99 x 7.7 x 1.5 cm; 41 g | ## Images ![24" Thermopile by Heatilator - 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 ### ⭐⭐⭐⭐⭐ Review *by C***E on 19 April 2019* Pour un foyer Tierra 2 heat and glo c’est excellent! ### ⭐⭐⭐⭐⭐ Review *by T***K on 22 December 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. ### ⭐⭐⭐⭐⭐ Review *by F***D on 11 November 2020* Tested it with a propane torch before installing as it was on a hard to access location. Heater fires right up now every time. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/406921207-24-thermopile-by-heatilator](https://www.desertcart.co.uk/products/406921207-24-thermopile-by-heatilator) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-21*