---
product_id: 5641935
title: "SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches"
brand: "rheem"
price: "31299CFA"
currency: XOF
in_stock: true
reviews_count: 13
category: "Rheem"
url: https://www.desertcart.sn/products/5641935-sp20172-flammable-vapor-fv-sensor-kit-white-6-7x2-7x9
store_origin: SN
region: Senegal
---

# Digital output for precise detection Compact 6.7x2.7x9.4 in size Flange mount for easy installation SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches

**Brand:** rheem
**Price:** 31299CFA
**Availability:** ✅ In Stock

## Summary

> 🔥 Don’t get left in the cold—upgrade your water heater’s safety with Rheem’s trusted sensor!

## Quick Answers

- **What is this?** SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches by rheem
- **How much does it cost?** 31299CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/5641935-sp20172-flammable-vapor-fv-sensor-kit-white-6-7x2-7x9)

## 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

- • **Swift Fix:** Install in under 10 minutes and get your water heater back online fast
- • **OEM Reliability:** Genuine Rheem part ensures safety and performance you can trust
- • **Compact & Durable:** Sleek plastic design fits seamlessly into your HVAC system with lasting durability
- • **Precision Detection:** Advanced digital sensor accurately detects flammable vapors to prevent hazards
- • **Top-Ranked Replacement:** Ranked #3 in Water Heater Replacement Parts—join thousands of satisfied pros

## Overview

The Rheem SP20172 Flammable Vapor Sensor Kit is a genuine OEM replacement part designed to quickly and reliably detect flammable vapors in your water heater system. Compact and easy to install, this digital-output sensor prevents hazardous lockouts and keeps your HVAC running smoothly. Trusted by thousands, it’s the go-to fix for maintaining safety and efficiency in modern water heaters.

## 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: Fired right up! - It’s hard to believe this little device can cause so much trouble. 😂 purchased my Rheem hot water heater at Home Depot 10 years ago. Had a pipe brake and cause the sensor to go out. Went to Home Depot to get the part and you guess it! Don’t carry it in stock in my area. And it would take a week to get it.. went to two places in town no one had it. Finally went to desertcart and purchased the sensor. Got it the next day! Hook it up in two mins. Or maybe less 😂 fired right up. Decided that’s never going to happen to me again. Ordered a back up. Maybe over kill! But maybe not. Will see 😀

## 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 | #7,935 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Water Heater Replacement Parts |
| Brand | Rheem |
| Brand Name | Rheem |
| Customer Reviews | 4.7 out of 5 stars 3,042 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

![SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches - Image 1](https://m.media-amazon.com/images/I/51Au2d2F1AL.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.

### ⭐⭐⭐⭐⭐ Fired right up!
*by A***R on May 24, 2026*

It’s hard to believe this little device can cause so much trouble. 😂 purchased my Rheem hot water heater at Home Depot 10 years ago. Had a pipe brake and cause the sensor to go out. Went to Home Depot to get the part and you guess it! Don’t carry it in stock in my area. And it would take a week to get it.. went to two places in town no one had it. Finally went to Amazon and purchased the sensor. Got it the next day! Hook it up in two mins. Or maybe less 😂 fired right up. Decided that’s never going to happen to me again. Ordered a back up. Maybe over kill! But maybe not. Will see 😀

### ⭐⭐⭐⭐⭐ Great price
*by Z***W on May 25, 2026*

Exactly what I needed for a last minute repair. Affordable and shipped right to my door

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---

*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-08-31*