Single Element Water Heater Thermostat WH5-4, WH9

Electric Water Heater Thermostat | OEM‑Compatible | WH5‑4, WH9 | 110–170°F Adjustable

Brand New – WH5‑4 Thermostat for Single‑Element Electric Water Heaters

This high‑quality OEM‑style WH5‑4, WH9 thermostat provides precise temperature control for electric water heaters that use a single heating element. Featuring an adjustable 110–170°F temperature range and a built‑in Hi‑Limit Reset Button (L180), this thermostat ensures safe, reliable operation. Designed for 115VAC systems, it is not compatible with dual‑element water heaters.

The patented APCOM encapsulated bimetal sensor design enhances temperature sensitivity and accuracy, delivering consistent hot water performance.

⚙️ Product Features

• Adjustable temperature range: 110–170°F
• Hi‑Limit Reset Button (L180) for added safety
• OEM‑style replacement for WH5‑4, WH9
• Designed for single‑element water heaters (115VAC)
• Encapsulated bimetal sensor for enhanced accuracy
• Slotted adjustment knob for easy temperature setting
• Tear‑drop wiring terminals for faster, secure installation
• Condition: Brand New – Unused

Replaces Part Numbers

WH5‑4 (Thermodisc), 5600‑211, 5600‑311, WH9

Fits Models

Model list not provided — compatible with single‑element electric water heaters using WH5‑4, WH9 thermostats.
Always verify compatibility with your exact model number before purchase.

Common Fixes

• No hot water or inconsistent temperature
• Water overheating or tripping the high‑limit switch
• Breaker tripping due to thermostat failure
• Single heating element not activating
• Thermostat stuck in ON or OFF position

️ 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
• Ensure thermostat sits flush against tank surface for accurate sensing
• Set temperature using the slotted knob (manufacturer recommends ~120°F)
• Restore power and test for consistent heating

Restore safe, accurate hot water control with this OEM‑compatible WH5‑4, WH9 thermostat engineered for single‑element water heaters.