Single Element Thermostat For Electric Water Tank, 230033, 4000HL

<div style="font-family: Arial, sans-serif; font-size:16px; line-height:1.55; color:#222;"> <h2 style="color:#0b4a8b;"> Knox Company Single‑Element Water Heater Thermostat | OEM‑Compatible | MFG# 4000HL</h2> <p><strong>Brand New – Knox Company Single‑Element Thermostat (Therm‑O‑Disc® New Style)</strong></p> <p>This high‑quality <strong>single‑element water heater thermostat</strong> replaces <strong>Therm‑O‑Disc® MFG# 4000HL</strong> and is designed for electric water heaters that use a <strong>single heating element</strong>. Featuring an adjustable <strong>90°F–150°F</strong> temperature range and a built‑in <strong>170°F high‑limit reset</strong>, this thermostat provides safe, reliable temperature control for residential water heaters.</p> <p>Engineered with a <strong>temperature‑sensitive bimetal disc</strong>, it delivers instant ON/OFF switching and dependable performance under high electrical loads. Welded internal construction ensures long‑lasting electrical integrity, and the compact design fits major water heater brands.</p> <h3 style="color:#333;">⚙️ Product Features</h3> <ul> <li><strong>OEM‑compatible replacement</strong> for Therm‑O‑Disc® 4000HL</li> <li><strong>For single‑element water heaters</strong> (120V)</li> <li><strong>Adjustable temperature range:</strong> 90°F–150°F</li> <li><strong>170°F high‑limit manual reset</strong> for added safety</li> <li><strong>Single‑throw design</strong> for simple, reliable operation</li> <li><strong>Bimetal disc technology</strong> for fast, accurate switching</li> <li><strong>Welded internal components</strong> for superior electrical durability</li> <li><strong>Fits major brands</strong> including Whirlpool®, US Craftmaster®, American®, AO Smith®, GE®, Rheem®, Ruud®, Richmond®</li> <li><strong>Condition:</strong> Brand New – Hang Bag Packaging</li> </ul> <h3 style="color:#333;"> Fits Water Heater Brands</h3> <p style="border:1px solid #ccc; padding:10px; background:#f7f7f7;"> Whirlpool®, US Craftmaster®, American®, AO Smith®, General Electric®, Rheem®, Ruud®, Richmond® <br><em>Always verify compatibility with your specific model before purchase.</em> </p> <h3 style="color:#333;"> Common Fixes</h3> <ul> <li>No hot water in single‑element systems</li> <li>Water overheating or tripping the high‑limit switch</li> <li>Thermostat stuck ON or OFF</li> <li>Inconsistent temperature control</li> <li>Breaker tripping due to thermostat failure</li> </ul> <h3 style="color:#333;">️ Installation Tips</h3> <ul> <li>Turn off power at the breaker before servicing</li> <li>Remove access panel and insulation to reach thermostat</li> <li>Take a photo of wiring before disconnecting</li> <li>Ensure thermostat sits flush against tank surface for accurate sensing</li> <li>Adjust temperature only as needed (120°F recommended for safety and efficiency)</li> <li>Press the high‑limit reset button if the thermostat has tripped</li> <li>Restore power and test for consistent heating</li> </ul> <p><strong>Dependable, accurate, and built to last — this Knox Company single‑element thermostat delivers reliable temperature control for modern electric water heaters.</strong></p> </div>

• OEM-compatible single-element water heater thermostat (Therm-O-Disc® 4000HL) with adjustable 90–150°F range and 170°F high-limit reset for safe temperature control.
• Bimetal disc switching and welded internal construction ensure fast response, durability, and reliable operation in 120V electric water heaters.
• Fits major brands (Whirlpool, AO Smith, Rheem, GE, etc.); ideal for fixing no-heat, overheating, or inconsistent water temperature issues.
• Designed for 120V single-element electric water heaters; bimetal disc switching and welded internal construction ensure durability under high electrical loads.