Maximize your water heater’s efficiency with the perfect upper thermostat for optimal performance and comfort.
Choosing the right upper thermostat is vital for maintaining your water heater’s efficiency. The Rheem UV11698 Therm-O-Disc Upper Thermostat ensures consistent water temperature, while the Reliance 9001954-045 Upper Electric Thermostat features an ECO setting for energy savings. Additionally, the Eastman 60172N Double Throw Upper Element Thermostat offers versatility for various heating needs.
These thermostats cater to different applications, making them ideal for residential and commercial use. They provide precise temperature control, enhancing comfort and safety. Their durable design ensures long-lasting performance, making them a smart investment.
In this review, you’ll learn about the top features, benefits, and installation tips for these upper thermostats. Get ready to make an informed choice for your water heater!


Rheem Upper Thermostat for Water Heaters
The Rheem UV11698 Therm-O-Disc Upper Thermostat sets itself apart with its precision engineering and reliability for electric water heaters. This thermostat features a robust design made from high-quality thermoplastic and operates efficiently at a maximum temperature of 150 degrees Fahrenheit. It is compatible with voltages of 208, 240, 277, and 480 volts, making it versatile for various heating systems.
Key Advantages
- The 2-pole high limit function ensures safety by preventing overheating, while the combination of normally open and normally closed contacts allows for flexible installation options.
Limitations
- Not compatible with gas water heaters, which limits its use to electric systems only.
Overall, the Rheem UV11698 is best for homeowners and technicians who require a reliable thermostat for electric water heaters. Its durable construction and high-performance capabilities make it an essential component for ensuring efficient water heating systems. Whether you are upgrading your current setup or performing maintenance, this thermostat provides the reliability and safety features needed for optimal performance.
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Reliance Upper Electric Thermostat ECO Black
The adjustable valve sets the Reliance 9001954-045 Upper Electric Thermostat apart from its competitors. This thermostat is specifically designed for use with electric water heaters, ensuring precise temperature control for optimal performance. Constructed from durable materials, it features a robust design with dimensions of 4.5 x 3.5 x 2 inches, making it compact yet effective for various installations.
Key Advantages
- The use of 316-grade stainless steel resists corrosion, extending the lifespan of the thermostat, especially in humid environments.
Limitations
- This thermostat is not compatible with gas water heaters or other non-electric heating systems, limiting its versatility.
Overall, the Reliance 9001954-045 Upper Electric Thermostat is best for outdoor enthusiasts needing reliable temperature regulation for their electric water heaters. Its adjustable valve feature allows for fine-tuning, making it ideal for those who require consistent and efficient heating solutions. While it excels in specific applications, users should be aware of its limitations regarding compatibility with other types of water heating systems.
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Eastman Double Throw Thermostat for Water Heaters
The adjustable valve sets the Eastman 60172N Double Throw Upper Element Thermostat apart from its competitors. Designed specifically for dual element water heaters, this thermostat is compatible with brands such as American, Rheem, and Bradford White. It features a robust construction using high-quality thermoplastic for durability and reliability. The dimensions are compact, making it easy to fit into tight spaces.
Key Advantages
- The built-in safety switch prevents overheating, ensuring safe operation and longevity of the water heater.
- With an adjustable temperature range of 90-degrees F to 150-degrees F, users can customize the water temperature to their specific needs.
- The single pull, double throw (SPDT) Therm-O-Disc style switch provides efficient operation by allowing seamless switching between two outputs.
- All necessary parts are included for an easy installation, making it accessible for DIY enthusiasts.
Limitations
- Not compatible with single element water heaters, which limits its use to specific applications.
- Some users may find the temperature range insufficient for specialized heating needs.
Best for homeowners and DIY enthusiasts needing a reliable thermostat for dual element water heaters, the Eastman 60172N offers a blend of safety, functionality, and ease of installation that meets the demands of modern water heating systems.
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Zero KST203 Upper Water Heater Thermostat
The Zero KST203 Water Heater Thermostat stands out with its energy-saving range setting, allowing users to customize temperature settings for optimal efficiency. Constructed with high-quality materials, this thermostat features a robust design suitable for dual element tanks, ensuring reliability in various environments. Its dimensions are compact, making it easy to install in tight spaces.
Key Advantages
- The 316-grade stainless steel components resist corrosion, enhancing durability and longevity.
- The built-in safety switch prevents overheating, providing an additional layer of protection for users.
- UL certification guarantees compliance with safety standards, ensuring peace of mind during operation.
Limitations
- Not compatible with single element tanks, which may limit its versatility for some users.
- Installation may require professional assistance, increasing overall costs.
Overall, the Zero KST203 Water Heater Thermostat is best for homeowners and outdoor enthusiasts needing reliable temperature control for water heating systems. Its advanced features and safety mechanisms make it a top choice for those seeking efficiency and durability in their water heating solutions.
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EWH-00 Electric Water Heater Thermostat Set
The adjustable valve sets the EWH-00 Electric Water Heater Thermostat apart, allowing users to precisely control temperature settings between 90°F and 150°F. Constructed from durable materials, this thermostat features a robust design tailored for compatibility with most electric water heaters, including brands like Whirlpool, Bradford White, and Rheem. The dimensions are compact, making it easy to install within tight spaces.
Key Advantages
- The use of **316-grade stainless steel** in the construction resists corrosion, enhancing the longevity of the unit.
- Equipped with a **temperature-sensitive bimetal disc**, it provides reliable snap-action to the contacts, ensuring efficient performance.
- Universal compatibility with both **Thermo-O-Disc (TOD)** and **Apcom** styles allows for versatile application across various models.
Limitations
- Not compatible with certain proprietary models outside the listed brands, which may limit options for some users.
- Installation may require basic plumbing knowledge, which could deter inexperienced users.
Best for outdoor enthusiasts needing reliable temperature control for their electric water heaters, the EWH-00 offers an effective solution for maintaining optimal water temperatures while ensuring durability and compatibility across a wide range of models.
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Faq about Water Heater Upper Thermostat:
1: What is a water heater upper thermostat?
A water heater upper thermostat regulates the temperature of the water in the upper part of the tank, ensuring consistent heating and efficiency.
2: How does the upper thermostat work?
The upper thermostat senses the water temperature and activates the heating element when the water falls below the set temperature, maintaining optimal heat levels.
3: What are the signs of a faulty upper thermostat?
Signs include inconsistent water temperature, water not heating, or the heater running continuously without reaching the desired temperature.
4: How do I test the upper thermostat?
To test, turn off power, remove the access panel, and use a multimeter to check continuity across the thermostat terminals.
5: Can I replace the upper thermostat myself?
Yes, if you have basic electrical skills, you can replace it by following safety precautions and the manufacturer’s instructions.
6: How often should I check the upper thermostat?
It’s advisable to check the upper thermostat annually during regular water heater maintenance to ensure proper function.
7: What temperature should the upper thermostat be set to?
The recommended setting is typically around 120 degrees Fahrenheit for optimal performance and safety.
Conclusion
Rheem’s Upper Thermostat exemplifies reliability and efficiency, ensuring optimal temperature regulation for water heaters, thus enhancing performance and longevity. Its robust design and precise functionality cater to both residential and commercial needs, making it a preferred choice among consumers.
Conversely, the Reliance Upper Electric Thermostat ECO Black stands out for its eco-friendly features and user-friendly interface. This thermostat not only promotes energy conservation but also guarantees consistent water heating, appealing to environmentally conscious users seeking cost-effective solutions.




