--- product_id: 5641935 title: "Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches" brand: "rheem" price: "€ 59.06" currency: EUR in_stock: true reviews_count: 13 category: "Rheem" url: https://www.desertcart.gr/products/5641935-rheem-sp20172-flammable-vapor-fv-sensor-kit-white-6-7x2 store_origin: GR region: Greece --- # Digital output for precise sensing Compact 6.7x2.7x9.4 in Plug & play flange mount design Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches **Brand:** rheem **Price:** € 59.06 **Availability:** ✅ In Stock ## Summary > 🔥 Don’t get locked out—upgrade your HVAC’s safety sensor today! 🛡️ ## Quick Answers - **What is this?** Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches by rheem - **How much does it cost?** € 59.06 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/5641935-rheem-sp20172-flammable-vapor-fv-sensor-kit-white-6-7x2) ## Best For - rheem enthusiasts ## Why This Product - Trusted rheem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted OEM Quality:** Genuine Rheem part ensures reliability and peace of mind. - • **Compact & Durable Design:** Space-saving plastic build fits seamlessly into your system. - • **Cost-Effective HVAC Rescue:** Avoid costly repairs by fixing vapor lockout errors fast. - • **Effortless DIY Installation:** Replace your sensor in under 10 minutes—no technician needed. - • **Precision Flammable Vapor Detection:** Keep your HVAC safe with OEM-grade sensor accuracy. ## Overview The Rheem SP20172 Flammable Vapor Sensor Kit is a genuine OEM replacement part designed to detect hazardous vapors and prevent HVAC lockouts. Compact and easy to install, it restores your system’s safety and functionality quickly, saving you from expensive repairs and downtime. ## Description Product Description This is a genuine replacement part. The model number and name for the following item is: Rheem SP20172 FV Sensor Kit From the Manufacturer The Rheem SP20172 is an FV sensor kit. HVAC replacement part Rheem SP20172. Get your system working properly once again with replacement parts. Review: The Genuine Rheem One - Fixed the Flammable Vapor Lockout Error on My Rheem Water Heater - I've had two identical Rheem Platinum 50-gallon water heaters for almost 10 years. Every few years it seems, they shut down and throw a "Flammable Vapor Lockout" error, which is indicated by seven flashes of the blue light on the gas valve assembly. A reset of the unit will usually clear the code. However, when the error starts happening too frequently for my taste, it's time to replace the flammable vapor sensor. This time, I checked the old sensor with a voltage-ohm meter and got a reading of 97,000 ohms resistance. According to Google, the reading should be between 9,000 and 45,000 ohms. So, mine was definitely reading outside the acceptable range, which indicates a failure. I used to contact Rheem and wait several days for them to send me a new vapor sensor under warranty for me to install myself. But, the last two times I just bit the bullet and ordered the sensor on desertcart. For less than $30 (as of 2026) I can have my water heater back up and running within two days (thanks to desertcart's 2-day shipping). The actual brand name of these sensors is ProTech. It's a brand apparently owned by Rheem. So, you're getting the official genuine Rheem part when you order this one. There are at least two cheaper but viable replacement sensors available on desertcart as I write this. One of them is half the price of the Rheem sensor. But I don't recognize the brand names and much prefer the OEM Rheem brand when safety is involved. The new sensor has worked flawlessly since I installed it two weeks ago. Installation takes less than 10 minutes. I'll continue to buy these as long as necessary, rather than bother with the water heater warranty. Review: Fixed FVS Fault after had hardwood floors refinished - This piece saved me a likely $150+ HVAC bill. One of my best purchases on here. I had my hardwood floors refinished and after I was able to return back my hot water heater wasn't working. I checked the controller unit and the flashing lights indicated I had a FVS Fault. I thought "well S***". (Appreantly the strong vapers from polyurethane sealant with hardwood refinishing can set this sensor off). I did a little research and decided to try and diy it. So glad I did. Installation was easy. Just a simple plug and play item. Then I reset my gas control unit and it worked instantly. Saved so much money and only took maybe 4 minutes. Works perfectly with my Rheem 50gal Professional Unit. ## Features - PLASTIC - Made in US - Size: 6.7X2.7X9.4 inches.Includes: FV Sensor (AP13447-3), Cap Plug (AP13450-3), and 6" Wire Tie. - HVAC replacement part Rheem SP20172. - Rheem/Ruud replacement FV sensor kit. - This product replaces the AP13447-3 (this kit includes this sensor) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00G2DL8M8 | | Best Sellers Rank | #21,626 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Water Heater Replacement Parts | | Brand | Rheem | | Brand Name | Rheem | | Customer Reviews | 4.7 out of 5 stars 3,048 Reviews | | Global Trade Identification Number | 00020352574103 | | Item Dimensions | 6.7 x 2.7 x 9.4 inches | | Item Part Number | SP20172 | | Item Type Name | FV Sensor Kit | | Item Weight | 0.27 g | | Item dimensions L x W x H | 6.7 x 2.7 x 9.4 inches | | Manufacturer | Rheem | | Material | Plastic | | Material Type | Plastic | | Model | SP20172 | | Mounting Type | Flange Mount | | Number of Items | 1 | | Number of Packs | 1 | | Output Type | Digital | | Part Number | SP20172 | | Specific Uses For Product | HVAC system maintenance and repair | | Style | Modern | | Style Name | Modern | | UPC | 662766396171 020352574103 785971458424 | | Unit Count | 1 Count | | Upper Temperature Rating | 122 °F | ## Product Details - **Brand:** Rheem - **Item dimensions L x W x H:** 6.7 x 2.7 x 9.4 inches - **Material:** Plastic - **Item Weight:** 0.01 Ounces - **Style:** Modern ## Images ![Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches - Image 1](https://m.media-amazon.com/images/I/516pos3iERL.jpg) ![Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches - Image 2](https://m.media-amazon.com/images/I/61fXDDOUgcL.jpg) ![Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches - Image 3](https://m.media-amazon.com/images/I/61leASBWnQL.jpg) ![Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches - Image 4](https://m.media-amazon.com/images/I/410kF2VgQGL.jpg) ## Questions & Answers **Q: Will this fit my richmond water heater model #6gr50pve2-42?** A: Hi Kathy-Chances are you may only have to reset the vapor sensor currently in your water heater.I presume that the water heater control is a honeywell. Flip the on/off button to OFF.Turn the thermostat knob to LOW.Unplug water heater and then plug back in.Turn the on/off switch to ON.Turn the thermostat knob fully HI and back to fully LOW seven times.The water heater should now be reset and turn on.If this fails,google "RHEEM SP20172 VAPOR SENSOR" and click on any of the RESET or REPLACE topics. **Q: Will this work for 7201 in Intelli Vent?** A: Yes sir **Q: My faulty fv sensor shows 7202, t-o-d, 25vs. will this work?** A: Most likely it will. Keep searching around to find the range of ohms it is supposed to read before it tells the gas to turn off. The other thing would be to go to the local appliance parts store and just get the one they have there for the immediate fix. Your time spent searching is basically worth the price difference. **Q: Will this work on a Lochinvar lvnl041g with the replacement part tst1027?** A: Hello. Thank you for the message. We do not have a database for the Lochinvar. However, if your old part number is TST1027, then this item will be compatible. Please let us know if you have any additional questions. Thank you! ## Customer Reviews ### ⭐⭐⭐⭐⭐ The Genuine Rheem One - Fixed the Flammable Vapor Lockout Error on My Rheem Water Heater *by M***C on August 5, 2026* I've had two identical Rheem Platinum 50-gallon water heaters for almost 10 years. Every few years it seems, they shut down and throw a "Flammable Vapor Lockout" error, which is indicated by seven flashes of the blue light on the gas valve assembly. A reset of the unit will usually clear the code. However, when the error starts happening too frequently for my taste, it's time to replace the flammable vapor sensor. This time, I checked the old sensor with a voltage-ohm meter and got a reading of 97,000 ohms resistance. According to Google, the reading should be between 9,000 and 45,000 ohms. So, mine was definitely reading outside the acceptable range, which indicates a failure. I used to contact Rheem and wait several days for them to send me a new vapor sensor under warranty for me to install myself. But, the last two times I just bit the bullet and ordered the sensor on Amazon. For less than $30 (as of 2026) I can have my water heater back up and running within two days (thanks to Amazon's 2-day shipping). The actual brand name of these sensors is ProTech. It's a brand apparently owned by Rheem. So, you're getting the official genuine Rheem part when you order this one. There are at least two cheaper but viable replacement sensors available on Amazon as I write this. One of them is half the price of the Rheem sensor. But I don't recognize the brand names and much prefer the OEM Rheem brand when safety is involved. The new sensor has worked flawlessly since I installed it two weeks ago. Installation takes less than 10 minutes. I'll continue to buy these as long as necessary, rather than bother with the water heater warranty. ### ⭐⭐⭐⭐⭐ Fixed FVS Fault after had hardwood floors refinished *by J***. on August 26, 2026* This piece saved me a likely $150+ HVAC bill. One of my best purchases on here. I had my hardwood floors refinished and after I was able to return back my hot water heater wasn't working. I checked the controller unit and the flashing lights indicated I had a FVS Fault. I thought "well S***". (Appreantly the strong vapers from polyurethane sealant with hardwood refinishing can set this sensor off). I did a little research and decided to try and diy it. So glad I did. Installation was easy. Just a simple plug and play item. Then I reset my gas control unit and it worked instantly. Saved so much money and only took maybe 4 minutes. Works perfectly with my Rheem 50gal Professional Unit. ### ⭐⭐⭐⭐⭐ Perfect *by D***E on October 14, 2026* Perfect replacement for our water heater. Easy install. --- ## 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.gr/products/5641935-rheem-sp20172-flammable-vapor-fv-sensor-kit-white-6-7x2](https://www.desertcart.gr/products/5641935-rheem-sp20172-flammable-vapor-fv-sensor-kit-white-6-7x2) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-10-30*