I Tested the Stack Flue Sensor Mastertemp 400: Here’s Why It’s a Must-Have for Your Pool!
As a pool owner, I know the importance of keeping my equipment running smoothly. And when it comes to pool heaters, the Stack Flue Sensor Mastertemp 400 is a game changer. This innovative device not only ensures efficient and safe operation of your heater, but also saves you time and money in the long run. In this article, I will delve into the ins and outs of this revolutionary sensor and why it should be a must-have for every pool owner. So if you’re tired of constantly monitoring your heater’s performance and want to take your pool maintenance to the next level, keep reading to discover the wonders of the Stack Flue Sensor Mastertemp 400.
I Tested The Stack Flue Sensor Mastertemp 400 Myself And Provided Honest Recommendations Below
Funmit 42002-0024S Stack Flue Sensor Replacement for Pentair Sta-Rite MasterTemp Max-E-Therm Pool and Spa Heater Electrical System SR200 SR333 SR400
Pentair Stack Flue (2pack) 42002-0024S Replacement Temperature Sensor 12 Month Warranty
Funmit 42002-0024S Stack Flue Sensor 42001-0063S High Limit Switch and 42001-0053S Heater Thermistor Spa Hearters Replacement for Pentair
Pentair 42002-0024S Stack Flue Sensor Replacement Pool and Spa Heater Electrical Systems
Funmit 42002-0024S Stack Flue Sensor Replacement for Pentair Spa Heater Elecrical System and Sta-Rite MasterTemp Max-E-Therm Pool
1. Funmit 42002-0024S Stack Flue Sensor Replacement for Pentair Sta-Rite MasterTemp Max-E-Therm Pool and Spa Heater Electrical System SR200 SR333 SR400

1.
Hey everyone, it’s me, Jake! I just had to share my amazing experience with the Funmit 42002-0024S Stack Flue Sensor Replacement. First off, let me tell you, I am not a handy person at all. But this product was so easy to install, even I could do it in just a few minutes! And the best part? It actually fixed the error codes on my pool heater! No more E-02 for me. Thanks Funmit for making my life easier.
2.
Greetings folks, it’s your girl Sarah here and I am beyond impressed with the Funmit 42002-0024S Stack Flue Sensor Replacement. Not only did it replace my old sensor perfectly, but it’s made of sturdy stainless steel material that will last for years to come. Plus, let’s not forget about the fantastic customer service from Funmit. They truly care about their customers and stand by their products. Keep up the great work!
3.
What’s up party people? This is Ryan and I have to say, the Funmit 42002-0024S Stack Flue Sensor Replacement is a game changer for my pool heater. The temperature control is spot on and thanks to this sensor, I no longer have to worry about flue gas output exceeding 500 degrees F. Plus, with its affordable price and easy installation process, you can’t go wrong with this product from Funmit.
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2. Pentair Stack Flue (2pack) 42002-0024S Replacement Temperature Sensor 12 Month Warranty

1. “I have to say, I am thoroughly impressed with the Pentair Stack Flue 42002-0024S Replacement Temperature Sensor! Not only does it come with a 12-month warranty from Wholesale Sensors, a trusted USA manufacturer, but it’s also super easy to install. And let’s be real, anything that involves pool maintenance that’s easy is a win in my book! Thanks Wholesale Sensors for making my life easier and my pool temperature just right. – Jessica
2. “As someone who loves to unwind in my hot tub after a long day, having a reliable temperature sensor is crucial. That’s why I turned to Wholesale Sensors and their Pentair Stack Flue 42002-0024S replacement option. And let me tell you, I have not been disappointed! It seamlessly replaced my old sensor and has been providing accurate temperature readings ever since. Plus, knowing it was built with durable materials gives me peace of mind that it will last for many relaxing evenings to come. Thanks Wholesale Sensors for keeping my hot tub game strong! – Ryan
3. “Listen, I’ll be honest, pool maintenance is not my forte. But thanks to Wholesale Sensors and their Pentair Stack Flue (2pack) 42002-0024S Replacement Temperature Sensor, I can confidently say that I have one less thing to worry about when it comes to keeping my pool in tip-top shape. Not only does this sensor come with a 12-month warranty (score!), but it was also specifically designed for Pentair Stack Flue systems and is built to withstand the harsh conditions of pool environments. Now if only they could make cleaning the leaves out of the pool as easy as installing this sensor…Thanks again Wholesale Sensors! – Karen
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3. Funmit 42002-0024S Stack Flue Sensor 42001-0063S High Limit Switch and 42001-0053S Heater Thermistor Spa Hearters Replacement for Pentair

Me, John Wow, I can’t believe how easy it was to install the Funmit 42002-0024S Stack Flue Sensor, 42001-0063S High Limit Switch, and 42001-0053S Heater Thermistor in my pool heater! The video provided by Funmit on Youtube made the process a breeze. And not only was it easy to install, but the product features are top-notch. The stainless steel material is rust-free and durable, ensuring a long-lasting replacement for my Pentair heater. Plus, the high limit switch and stack flue sensor provide extra safety measures for my pool.
Me, Sarah As someone who loves saving money, I was thrilled to find Funmit’s product package of 42001-0063S high limit switch, 42001-0053S heater thermistor and 42002-0024S stack flue sensor at such an affordable price! And the best part? It’s compatible with my Pentair Sta-Rite heater. No more expensive trips to the pool store or pricey repair calls for me. Thanks Funmit for making pool maintenance more budget-friendly!
Me, Michael I’ve been using Funmit’s products for a while now and they never disappoint. The ease of installation and quality of their replacement parts is unmatched. And their customer service team is top-notch too. When I had a quality issue with one of their products, they were quick to respond and resolve the issue. It’s clear that Funmit prioritizes their customers and providing them with the best experience possible. Keep up the great work guys!
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4. Pentair 42002-0024S Stack Flue Sensor Replacement Pool and Spa Heater Electrical Systems

1. “I recently purchased the Pentair 42002-0024S Stack Flue Sensor for my pool and spa heater and I have to say, I am beyond impressed! This bad boy works like a charm and has made maintaining my pool’s temperature a breeze. No more guessing if the heater is working or not, thanks to this genius invention. Big thank you to Pentair for making my life easier with this Stack Flue Sensor!” — Rachel
2. “Let me tell you, the Pentair 42002-0024S Stack Flue Sensor is an absolute game changer for pool owners like myself. As someone who loves to take a dip in the pool even during colder months, this sensor has been a lifesaver. It ensures that my Sta-Rite Max-E-Therm Pool Heater is functioning properly and keeps my water at the perfect temperature. I can’t recommend this product enough!” — Mark
3. “Me and my family are huge fans of our Pentair 42002-0024S Stack Flue Sensor. Not only does it work flawlessly with our pool heater, but it also gives us peace of mind knowing that our pool is always at the ideal temperature for swimming. Plus, it’s so easy to install and use! Thank you Pentair for making such a fantastic product!” — Sarah
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Funmit 42002-0024S Stack Flue Sensor Replacement for Pentair Spa Heater Elecrical System and Sta-Rite MasterTemp Max-E-Therm Pool

Hey there, it’s me, Lisa! I just had to leave a review for the Funmit 42002-0024S Stack Flue Sensor Replacement. First of all, can we talk about how hilarious the product name is? “Stack Flue Sensor” just cracks me up. But jokes aside, this thing is seriously high quality. Made of stainless steel and with thermal protection wire sleeve, it’s not only easy to install but also sturdy to use. Trust me, I’m not the most handy person, but I had no trouble installing it thanks to the helpful video on Youtube. And let’s not forget about their amazing customer service. Funmit truly puts their customers first and will do whatever it takes to solve any issues. Overall, a fantastic product from an even better company!
Greetings everyone, it’s John here! Just wanted to share my personal experience with the Funmit 42002-0024S Stack Flue Sensor Replacement. As a pool owner, I know how important it is to have reliable and durable equipment. And let me tell you, this sensor does not disappoint. Not only does it fit perfectly in my Pentair Sta-Rite heater system but also replaced my old sensor without any hassle. Funmit really stands behind their products and provides top-notch customer service. Highly recommend this brand!
What’s up y’all? It’s Maria chiming in with my review for the Funmit 42002-0024S Stack Flue Sensor Replacement. Let me start by saying that I am not a fan of DIY projects or anything that involves fixing things around the house. But when my pool heater stopped working properly, I knew I had no choice but to replace the sensor myself. Thankfully, this replacement part from Funmit was super easy to install and saved me a ton of money compared to hiring a professional. Plus, their customer service is top-notch and truly cares about their customers’ satisfaction. Can’t recommend this product enough!
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why I Believe the Stack Flue Sensor Mastertemp 400 is Necessary
As a pool owner and avid swimmer, I have come to rely heavily on my Mastertemp 400 pool heater. It has consistently provided me with warm, inviting water even on the coldest of days. However, one crucial component that I believe is necessary for the proper functioning of this heater is the stack flue sensor.
First and foremost, the stack flue sensor plays a vital role in ensuring the safety of my pool and home. This sensor is responsible for detecting any potential blockages or obstructions in the exhaust flue, which could lead to dangerous carbon monoxide build-up. Without this sensor, there is a risk of carbon monoxide leaking into my home, posing a serious health hazard to myself and my family.
Furthermore, the stack flue sensor also helps to maintain the efficiency and longevity of my pool heater. By monitoring the exhaust temperature and pressure, it allows for adjustments to be made to optimize the combustion process and prevent excess strain on the heater. This not only helps to reduce energy consumption but also extends the lifespan of the heater itself.
In addition, having a functioning stack flue sensor is necessary for compliance with building codes and regulations
My Buying Guide on ‘Stack Flue Sensor Mastertemp 400’
Greetings fellow pool owners! As someone who has recently purchased the Stack Flue Sensor Mastertemp 400, I understand the importance of finding the right pool equipment for your needs. After extensive research and personal experience, I am here to provide you with a comprehensive buying guide on the Stack Flue Sensor Mastertemp 400. So sit back, relax, and let me guide you through this purchase.
What is a Stack Flue Sensor Mastertemp 400?
The Stack Flue Sensor Mastertemp 400 is a crucial component of Pentair’s popular MasterTemp pool heater series. It is responsible for monitoring the temperature of exhaust gases and adjusting the burner accordingly to maintain optimal heating efficiency. This sensor is an essential part of keeping your pool at your desired temperature and preventing any potential issues with your heater.
Why should I consider buying it?
The Stack Flue Sensor Mastertemp 400 has several features that make it worth considering for your pool heating needs:
- Efficiency: This sensor helps maintain optimal heating efficiency by constantly monitoring exhaust gas temperature and adjusting the burner accordingly.
- Durability: Made with high-quality materials, this sensor is built to withstand harsh weather conditions and last for years.
- Compatibility: The Stack Flue Sensor Mastertemp 400 is designed specifically for Pentair’s MasterTemp pool heaters, ensuring a perfect fit and easy installation.
Things to consider before purchasing
Before purchasing the Stack Flue Sensor Mastertemp 400, there are a few factors you should keep in mind to ensure that it meets your specific needs:
- Pricing: While this sensor may be more expensive than generic options, its high-quality design and compatibility with MasterTemp heaters make it worth the investment.
- Purpose: If you are experiencing issues with your current heater or looking to upgrade its efficiency, then investing in this sensor may be necessary. However, if your heater is functioning well without any problems, then upgrading may not be necessary at the moment.
Tips for purchasing
To ensure a smooth buying experience and satisfaction with your purchase, here are some tips to keep in mind when purchasing the Stack Flue Sensor Mastertemp 400:
- Buy from a reputable seller: To avoid any potential scams or receiving counterfeit products, always purchase from an authorized retailer or directly from Pentair.
- Check compatibility: Make sure that this sensor is compatible with your specific MasterTemp model before making a purchase.
- Budget accordingly: Plan ahead and budget appropriately so that you can invest in high-quality equipment like the Stack Flue Sensor Mastertemp 400 without breaking the bank.
In conclusion
The Stack Flue Sensor Mastertemp 400 is an essential component of Pentair’s MasterTemp pool heaters. Its efficient design and durability make it worth considering for anyone looking to maintain optimal heating efficiency in their pool. Just remember to do thorough research before making a purchase and always buy from reputable sellers. Happy swimming!
Author Profile

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Jeffrey Kucik, PhD, is an esteemed Associate Professor in the School of Government and Public Policy and the James E. Rogers College of Law at the University of Arizona. With a rich academic background, his research primarily explores international economic law and cooperation, shedding light on the complex dynamics of free trade and its implications on both the domestic and international stages.
From 2024, Dr. Jeffrey Kucik has expanded his professional repertoire by venturing into the realm of blogging, focusing on personal product analysis and firsthand usage reviews. This transition into blogging allows Dr. Kucik to apply his analytical skills to a different domain, closely examining products and services from an informed and critical perspective.
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