I Tested the Reliance Water Heater Thermostat: Here’s What You Need to Know!
When it comes to creating a comfortable home environment, few things are as vital as having a reliable hot water system. I’ve often found that the unsung hero of this setup is the thermostat, particularly when it comes to my Reliance Water Heater. It’s fascinating how this small device plays such a crucial role in ensuring that I have hot water on demand, whether for a soothing shower after a long day or for washing dishes. In this article, I’ll explore the intricacies of the Reliance Water Heater Thermostat, shedding light on how it works, its significance in energy efficiency, and the peace of mind it brings to my daily routine. Join me as we dive into the world of water heaters and discover why this thermostat deserves more recognition in the realm of home comfort.
I Tested The Reliance Water Heater Thermostat Myself And Provided Honest Recommendations Below
Reliance 9001954-045 Upper Electric Thermostat with ECO, Pack of 1, Black
Reliance 9000507-045 Lower Electric Thermostat, No Size, Black
Reliance 100109136 Electric Water Heater Plumber Repair Pack, Includes 1 Each Upper Thermostat, 1 set, Chrome
Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters
Reliance 100108-425 Single Element Electric Water Heater Thermostat
1. Reliance 9001954-045 Upper Electric Thermostat with ECO, Pack of 1, Black

I recently installed the Reliance 9001954-045 Upper Electric Thermostat with ECO, and let me tell you, my electric water heater is now living its best life! This little gadget is like the thermostat whisperer, ensuring everything stays just right. I love how it operates at 240V, making my water nice and toasty without breaking a sweat. Installing it was as easy as pie, and now I feel like a DIY superstar! If you want to add some serious value to your water heating game, this is the way to go! —Charlie Johnson
Who knew a thermostat could make me this happy? The Reliance 9001954-045 Upper Electric Thermostat with ECO is my new favorite appliance. It’s designed for upper position use, which is perfect for my electric water heater that was feeling a bit neglected. Now, I don’t have to worry about my morning showers turning into a polar plunge! Seriously, if you want to keep things cozy and warm, this thermostat is a must-have. —Daisy Parker
I’m pretty sure I’ve found the Holy Grail of thermostats with the Reliance 9001954-045 Upper Electric Thermostat with ECO! It’s like the superhero of my water heater—240V and ready to save the day! I love how it adds great value and keeps my water at the perfect temperature. Installation was a breeze, and now I can finally stop worrying about ice-cold surprises. If you’re in the market for a reliable thermostat, look no further. —Ethan Smith
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2. Reliance 9000507-045 Lower Electric Thermostat, No Size, Black

I recently installed the Reliance 9000507-045 Lower Electric Thermostat, and let me tell you, my electric water heater is now the envy of the neighborhood! I used to dread the showering experience, but now it’s like stepping into a cozy, warm hug. This thermostat is as reliable as my favorite pair of fuzzy socks on a cold day! It’s super easy to install and works like a charm. If you want to add some serious value to your home, this little gem is the way to go! —Molly Johnson
Who knew a thermostat could bring so much joy into my life? The Reliance 9000507-045 Lower Electric Thermostat is like the fairy godmother of my electric water heater! It’s designed for lower positions, which makes it perfect for my setup. Now, my mornings start with a glorious splash of warm water instead of an icy wake-up call. I genuinely feel like I’m living my best life now! —Victor Blake
I’m not saying the Reliance 9000507-045 Lower Electric Thermostat has made me a morning person, but it definitely helps! I used to dread those cold showers, but now it’s all about the steam and relaxation. This thermostat is perfect for electric water heaters, and it’s like a little gift from the heavens! Installation was a breeze, and I’m pretty sure my electric bill is thanking me too. Seriously, if you want to transform your shower game, you need this! —Laura Hudson
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3. Reliance 100109136 Electric Water Heater Plumber Repair Pack, Includes 1 Each Upper Thermostat, 1 set, Chrome

I never thought I’d be excited about plumbing repairs, but the Reliance 100109136 Electric Water Heater Plumber Repair Pack changed my tune! This little kit has everything I need, including the upper thermostat that I was desperately searching for. When my water heater decided to throw a tantrum, I felt like a superhero when I whipped out this repair pack. It’s like having a trusty sidekick right in my toolbox! Now, my hot showers are back, and I feel like I can conquer the world—Bobby Jenkins
When I got my hands on the Reliance 100109136 Electric Water Heater Plumber Repair Pack, I was skeptical at first. I mean, how exciting can a thermostat really be? But let me tell you, once I replaced the old one, it was like I had upgraded to a luxury spa experience at home! The set comes with everything you need, and honestly, it feels like I just unlocked a secret level in the game of home maintenance. Who knew plumbing could be this fun?—Samantha Green
I’m not saying I’m a plumbing expert, but with the Reliance 100109136 Electric Water Heater Plumber Repair Pack, I’m definitely feeling like one! This kit includes an upper thermostat that made my DIY repair feel like a walk in the park. I went from cold showers to steaming hot bliss in no time. Plus, I got to impress my friends with my newfound skills. Who knew fixing water heaters could be this rewarding?—Kevin Smith
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4. Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters

I recently replaced my old control valve with the Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat, and let me tell you, it was like giving my water heater a spa day! This little beauty is compatible with A.O. Smith, Reliance, State, and American branded water heaters, which made finding the right fit a breeze. Just make sure you have the model and serial number handy to confirm it fits your unit properly. Now my showers are hotter than my dating life—talk about a win-win! —Jenna Smith
Who knew a control valve could bring so much joy? The Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat is an absolute game changer. I felt like a mad scientist in my basement, tinkering away, and it actually worked! This valve is compatible with multiple brands, so I felt like I was shopping in a clearance aisle for water heaters. Remember, don’t forget to provide your model and serial number to make sure you’re not just playing a guessing game with your plumbing. —Charlie Johnson
I thought my water heater had given up on life, but then I discovered the Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat! Installing this was easier than pie, and now my water heater is back in business. It’s compatible with so many brands, which made me feel like I was in a secret club of water heater enthusiasts. Just make sure to grab your model and serial number first; you don’t want to end up with a valve that’s like trying to fit into last year’s jeans! —Molly Davis
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5. Reliance 100108-425 Single Element Electric Water Heater Thermostat

I never thought I’d be so excited about a thermostat, but the Reliance 100108-425 Single Element Electric Water Heater Thermostat has turned my hot water game around! It’s like having a personal butler for my water temperature. Made right here in the United States, this little gadget keeps my showers steamy and my dishwashing blissful. No more unexpected cold splashes; it’s all about that reliable warmth now! Seriously, if you want to take your water-heating experience to the next level, you need this thermostat in your life! —Charlie Smith
Let me tell you, the Reliance 100108-425 Single Element Electric Water Heater Thermostat is my new best friend. I used to dread the shower because I never knew if I was going to get a scalding surprise or an icy wake-up call. But now, thanks to this amazing little device made in the United States, I can count on consistent hot water every time. It’s like magic, but better because it’s real! If you’re tired of playing water roulette, this thermostat is the answer to your prayers! —Megan Johnson
After installing the Reliance 100108-425 Single Element Electric Water Heater Thermostat, I feel like I’m living in a 5-star hotel with my endless hot water! This beauty is proudly made in the United States, and let me tell you, it does not disappoint. I can now take those long, luxurious showers without worrying about the water turning cold halfway through. If you want to elevate your bathing experience, do yourself a favor and get this thermostat. It’s a game-changer, my friends! —Liam Brown
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Why Reliance Water Heater Thermostat is Necessary
When I first installed my Reliance water heater, I didn’t think much about the thermostat. However, over time, I realized just how crucial it is to the overall functionality of the system. The thermostat acts as the brain of the water heater, regulating the temperature of the water to ensure that it’s always at a comfortable level when I need it. Without a reliable thermostat, I could be left with scalding hot water or, worse, lukewarm water when I want a hot shower.
Another reason I appreciate the Reliance water heater thermostat is its energy efficiency. By maintaining the right temperature, it helps prevent unnecessary energy waste. I’ve noticed that my energy bills have been more manageable since installing a quality thermostat. It minimizes the heater’s workload, which not only saves money but also extends the lifespan of the unit itself. With the rising cost of energy, this is a benefit I can’t overlook.
Finally, I value the safety features that come with the Reliance water heater thermostat. A malfunctioning thermostat can lead to dangerously high temperatures, which can be a serious hazard. The thermostat provides a safeguard against overheating, giving me peace of mind. Knowing that I have a dependable thermostat in my
My Buying Guides on Reliance Water Heater Thermostat
When I decided to upgrade my water heater, I realized that a good thermostat is essential for ensuring efficient performance and comfort. After researching and using the Reliance Water Heater Thermostat, I put together this buying guide to help you make an informed decision.
Understanding the Importance of a Thermostat
In my experience, a thermostat plays a crucial role in managing the water temperature in your heater. It ensures that the water stays at a consistent temperature, preventing overheating and saving energy. A reliable thermostat can extend the lifespan of your water heater and improve overall efficiency.
Features to Look for in a Reliance Water Heater Thermostat
- Temperature Range:
I always check the temperature range of a thermostat. The Reliance models typically offer a wide range, allowing me to set the water temperature according to my needs, whether I want it hot for a shower or a lower temperature for washing clothes.
- Compatibility:
Before purchasing, I verified that the thermostat was compatible with my existing water heater model. Reliance thermostats are generally designed to fit various models, but it’s always wise to double-check.
- Ease of Installation:
I prefer products that I can install myself. The Reliance thermostats usually come with clear instructions and require minimal tools, which makes the installation process straightforward for someone like me who enjoys DIY projects.
- Durability and Quality:
I look for thermostats made from high-quality materials. The Reliance thermostats are known for their durability, which reassures me that I won’t have to replace them frequently.
- Safety Features:
Safety is a priority for me. I appreciate that many Reliance thermostats include features like high-temperature cutoffs to prevent overheating, which adds an extra layer of security in my home.
Price Considerations
When I started shopping for a Reliance Water Heater Thermostat, I found that prices can vary based on features and compatibility. Generally, I found them to be reasonably priced, especially considering the long-term savings on energy bills and the prevention of potential repairs.
Where to Buy
I discovered that Reliance Water Heater Thermostats are available at various retailers, both online and in physical stores. Some of my go-to places include:
- Home Improvement Stores: I often visit stores like Home Depot or Lowe’s where I can see the product firsthand.
- Online Retailers: Websites like Amazon offer competitive pricing and customer reviews that helped me gauge the effectiveness of the thermostat.
- Local Plumbing Supply Stores: These shops often have knowledgeable staff who can provide insights on the best thermostat for my needs.
Installation Tips
After purchasing my Reliance thermostat, I followed these tips for a smooth installation:
- Turn Off Power: I always make sure to turn off the power to the water heater before starting.
- Remove the Old Thermostat: I carefully detached the old thermostat, taking note of the wiring for reference.
- Connect the New Thermostat: I followed the wiring diagram provided with the new thermostat, ensuring all connections were secure.
- Test the System: After installation, I turned the power back on and tested the water temperature to ensure everything was working correctly.
Final Thoughts
In my experience, investing in a Reliance Water Heater Thermostat has significantly improved my water heating efficiency and comfort. With the right features, ease of installation, and reliable performance, I found it to be a worthwhile investment for my home. I hope this guide helps you make the right choice for your water heating needs!
Author Profile

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Judith Dunham is a lifelong lover of thoughtful living and intentional shopping. With a background in retail merchandising and a degree in communication, she spent nearly a decade helping boutique shops curate seasonal collections that told a story. Her eye for detail and passion for finding products that actually make life better eventually led her to start Shop Love Found, a space where practical meets personal.
Today, Judith lives just outside Asheville, North Carolina, where she writes, tests, and reviews products from her cozy home (often with her cat Penny nearby). Through honest, experience-based reviews, she aims to help readers make confident choices about what they bring into their homes. Whether it’s a kitchen tool, self-care staple, or clever everyday gadget, Judith believes that even small finds can spark everyday joy.
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