Electric Water Heater, Lower Thermostat, 5600-011, 5600-411, WH-5

APCOM WH9 Lower Water Heater Thermostat | OEM‑Compatible | 110–170°F Adjustable

Brand New – APCOM WH9 Electric Water Heater Thermostat for Lower Element

This high‑quality OEM‑style WH9 lower thermostat is designed for electric water heaters that use a dedicated lower heating element. With an adjustable 110–170°F temperature range and a slotted adjustment knob, it provides precise, reliable temperature control for consistent hot water performance.

Engineered with APCOM’s patented encapsulated bimetal sensor, this thermostat delivers superior temperature sensitivity and accuracy compared to conventional thermostats. The design protects the sensor from external heat influence, ensuring stable and dependable system control.

⚙️ Product Features

• OEM‑compatible replacement for WH9 / Thermodisc WH5
• Lower element thermostat for dual‑element water heaters
• Adjustable temperature range: 110–170°F
• Slotted adjustment knob for easy temperature setting
• Encapsulated bimetal sensor for enhanced accuracy
• Tear‑drop wiring terminals for fast, secure installation
• Safety override feature trips at 180°F for added protection
• Condition: Brand New – Unused

Replacement For

Thermodisc WH5, WH9, 5600‑011, 5600‑411
Direct‑fit lower thermostat replacement.

Fits Models

Model list not provided — compatible with electric water heaters using WH9 lower thermostats.
Always verify compatibility with your exact model number before purchase.

Common Fixes

• No hot water or insufficient hot water
• Lower element not activating
• Water temperature inconsistent or too cold
• Thermostat stuck in ON or OFF position
• Breaker tripping due to thermostat failure

️ Installation Tips

• Turn off power at the breaker before servicing
• Remove access panel and insulation to reach the lower thermostat
• Take a photo of wiring before disconnecting
• Ensure thermostat sits flush against the tank surface for accurate sensing
• Adjust temperature using the slotted knob (120°F recommended for safety)
• Restore power and test for proper heating

Restore accurate, reliable lower‑element heating performance with this OEM‑compatible APCOM WH9 thermostat.