Upper Thermostat For Electric Water Tank, 230063, 4100HL

Knox Company Upper Water Heater Thermostat | OEM‑Compatible | 4100HL / 230063

Brand New – Knox Company 4100HL Upper Thermostat for Electric Water Heaters

This premium OEM‑compatible upper thermostat replaces Knox 4100HL / 230063 and meets OEM specification lengths for many leading water heater brands, including Whirlpool®, US Craftmaster®, American®, AO Smith®, General Electric®, Rheem®, Ruud®, and Richmond®. Designed to control the upper heating element in double‑element electric water heaters, it ensures accurate temperature regulation and dependable performance.

The thermostat features a 90°F–150°F adjustable temperature range (factory‑set at 120°F) and includes a manual reset safety switch to prevent overheating.

⚙️ Product Features

• OEM‑compatible replacement for 4100HL / 230063
• Controls upper heating element in dual‑element water heaters
• Adjustable temperature range: 90°F–150°F (factory‑set at 120°F)
• Manual reset safety switch prevents overheating
• Temperature‑sensitive bimetal disc for instant ON/OFF switching
• Fast, forceful contact separation for long‑lasting reliability under high electrical loads
• Welded internal construction for superior electrical integrity
• CSA listed for safety compliance
• Condition: Brand New – Unused

Fits Water Heater Brands

Whirlpool®, US Craftmaster®, American®, AO Smith®, General Electric®, Rheem®, Ruud®, Richmond®
Always verify compatibility with your specific model before purchase.

Common Fixes

• No hot water or insufficient hot water
• Water overheating or tripping the high‑limit switch
• Upper heating element not activating
• Inconsistent temperature control
• Breaker tripping due to thermostat failure

️ Installation Tips

• Turn off power at the breaker before servicing
• Remove access panel and insulation to reach thermostat
• Take a photo of wiring before disconnecting for easy reassembly
• Ensure thermostat sits flush against tank surface for accurate sensing
• Adjust temperature only as needed (120°F recommended for safety and efficiency)
• Press manual reset button if the high‑limit switch has tripped
• Restore power and test for consistent heating

Upgrade your water heater’s performance with this reliable, OEM‑compatible Knox 4100HL upper thermostat engineered for accuracy and long‑lasting control.