Best Upper Thermostats for Water Heaters: Top Replacement Picks for Efficient Heating
Choosing the right upper thermostat for your electric water heater helps maintain consistent temperatures, protect against overheating, and extend the life of your unit. The following selections are popular, compatible options sourced from well-known brands. This guide highlights key features, compatibility notes, and what to consider when shopping for an upper thermostat replacement.
Summary of chosen products:
| Product | Brand | Key Features |
|---|---|---|
| Rheem UV11698 Therm-O-Disc Upper Thermostat | Rheem | 2-pole high limit; normally open & normally closed contacts; max 150°F |
| Eastman 60172N Double Throw Upper Element Thermostat | Eastman | SPDT switch; adjustable 90–150°F; safety switch |
| EWH-00 Electric Water Heater Thermostat (Upper) | DROMIX | Upper/Lower included; TOD style; 90–150°F; 120–480V |
| Apcom WH10-A Bradford White Upper Thermostat | APCOM | Upper thermostat for Bradford White |
| Zero KST203 Upper Thermostat | Z | Double throw; 120/480 VAC; safety switch; energy range setting |
The selections above emphasize compatibility with many electric water heaters, robust switching actions, and adjustable temperature ranges typical for most installations. Each option supports safe operation by integrating a high-limit/overheat protection mechanism and a configurable setpoint.
Rheem UV11698 Therm-O-Disc Upper Thermostat
The Rheem UV11698 upper thermostat is designed for electric water heaters and features a 2-pole high-limit arrangement with normally open and normally closed contacts. Its maximum temperature setting reaches 150 degrees, aligning with common safety and performance targets for residential systems. The TOD/thermo-disc style switching provides reliable control when paired with Rheem or compatible brands. Installations typically require standard wiring practices and ensure the thermostat is sized for the tank’s electrical configuration.
Reliance 9001954-045 Upper Electric Thermostat
Reliance offers a compact upper thermostat with ECO features, packaged as a DP (double pole) up thermostat. While presented as a simple high-temperature cutout, it integrates with common electric water heater configurations. It’s noted as a China-made unit in the description, which may factor into sourcing decisions for replacements. Ensure thread size and terminal layout align with your heater’s existing wiring before purchasing.
Eastman 60172N Double Throw Upper Element Thermostat
Eastman’s 60172N is designed to fit a broad range of water heater brands and supports dual-element configurations. It features a built-in safety switch to reduce overheating risk and offers an adjustable range from 90°F to 150°F. The SPDT (single-pole double-throw) design enables switching between two outputs, which can be important for dual-element systems. This unit is commonly compatible with many American, Craftmaster, Rheem, and other major brands.
EWH-00 Electric Water Heater Thermostat (Upper)
The EWH-00 kit includes an upper thermostat paired with a lower thermostat, suitable for TOD/APCOM style compatibility. It supports a broad voltage range from 120V to 480V and includes a one-year warranty. The temperature range is set between 90°F and 150°F, with a high-limit at 170°F, aligning with typical safety standards. This option is a practical choice for replacements on many electric water heaters, enabling straightforward swap-outs when paired with existing elements and fixtures.
EWH-02 Electric Water Heater Tune-Up Kit
The EWH-02 kit combines multiple components for a full tune-up, including an upper and lower thermostat alongside protective covers. It supports 120V–480V operation and a 90–150°F adjustable range, with a 170°F high limit. The kit is designed for 30+ gallon tanks and emphasizes adaptability to Tod and APCOM style configurations. This option suits homeowners looking to refresh multiple control parts at once while maintaining a single replacement order.
Apcom WH10-A Bradford White Upper Thermostat
The Apcom WH10-A upper thermostat is commonly used with Bradford White water heaters. As a branded replacement, it ensures compatibility with Bradford White’s control layout and wiring schemes. When ordering, verify the model’s fit with your heater’s upper control housing and confirm your unit’s voltage and connection points align with the thermostat’s specifications to avoid misfit or compatibility issues.
Zero KST203 Upper Thermostat
The Zero KST203 upper thermostat emphasizes a double-throw design suitable for dual-element tanks, with a 120/480 VAC rating and an energy-saving range setting. It integrates a built-in safety switch to prevent overheating and supports typical TOD-style installations. This option can be a cost-effective replacement for many standard electric water heaters that require a reliable upper switch with adjustable heat settings.
LONG TERM KST200&203 Electric Water Heater Thermostat Kit
The LONG TERM KST200&203 kit includes both an upper and lower thermostat, designed for non-simultaneous operation across a broad voltage range (120V–480V). It supports temperatures from 90°F to 150°F and uses the Thermo-O-Disc (TOD) style, compatible with many popular brands including Rheem, Reliance, and more. The kit targets homeowners seeking a comprehensive replacement bundle for double-element water heaters, with broad brand compatibility and clear installation expectations.
Buying Guide: Key Purchase Considerations
- Compatibility: Check your water heater’s make, model, and element configuration (single or dual-element, TOD vs APCOM style). Many thermostats list compatible brands or element types; confirm with your heater’s wiring diagram.
- Temperature Range: Most upper thermostats offer a range around 90°F to 150°F. Consider whether you need precise adjustment for your household hot water needs and energy efficiency goals.
- Electrical Rating: Verify voltage and resistance ratings (120V vs 240V, 208V/480V where applicable). Mismatched voltage can cause improper heating or failure.
- Safety Features: Look for built-in safety switches or high-limit protections (often labeled as TOD or safety cutoff) to prevent overheating and potential damage.
- Installation Considerations: Some units are sold as part of a kit (including lower thermostats or protective covers). If you’re replacing only the upper thermostat, ensure the wiring terminals and mounting fit your current setup.
- Brand and Availability: Reputable brands (Rheem, Eastman, APCOM, etc.) tend to offer reliable replacements and easier service in the future. Availability can influence lead times and compatibility with older heaters.
- Warranty and Support: A one-year warranty or longer provides assurance for replacements. Consider kits that come with comprehensive support for installation questions.
- Future-Proofing: If your heater is aging, you might opt for a kit that includes both upper and lower thermostats to simplify future maintenance and reduce repeated shipping costs.
- Safety and Compliance: U.S.-market products with UL or equivalent certifications generally ensure safer operation and adherence to standard electrical practices.
When selecting a replacement upper thermostat, weigh compatibility with your unit and the level of control you want over the water temperature. A properly chosen upper thermostat helps maintain consistent hot water delivery, reduces energy waste, and minimizes the risk of overheating. For enthusiasts performing DIY maintenance, following the manufacturer’s wiring diagrams and turning off power at the breaker before any work is essential.