🛡️ Gecko Hi Limit Sensor 9920-400446 – SSPA & MSPA-MP Control Systems

The Gecko 9920-400446 Hi Limit Sensor is designed for use with SSPA and MSPA-MP spa control systems, ensuring reliable temperature protection for your hot tub or spa. This safety sensor helps prevent overheating by monitoring water temperature and signaling the system to shut down if limits are exceeded.

✅ Key Features:

• For SSPA & MSPA-MP Series Spa Packs – Compatible with a wide range of Gecko control systems
• 48 inch Cable Length – Flexible installation for most spa setups
• 1/4 inch Diameter Stainless Steel Probe – Accurate temperature sensing and corrosion resistance
• 2-Pin Connector – Simple plug-in replacement for quick repairs
• Alternate Part #59-337-1055 – Equivalent to other OEM and aftermarket sensors meeting the same specs

🧰 Installation & Compatibility:

• Unplug spa from power before replacing sensor
• Locate the hi limit sensor on the heater tube or manifold
• Disconnect old sensor and plug in new sensor using existing 2-pin connector
• Secure the probe in the mounting location and verify cable routing is clear of moving parts
• Restore power and test system for proper operation

⚠️ Important: For use with Gecko SSPA and MSPA-MP spa packs only. Not universal—confirm compatibility with your spa control system or consult your owner's manual.

🏆 Why Replace Your Hi Limit Sensor?

• Prevents heater and equipment damage due to overheating
• Restores safe, reliable operation when the old sensor fails or gives error codes
• Quick, cost-effective DIY solution for common hi limit and temperature errors

Premier Pool & Spa carries a full line of genuine Gecko spa parts, sensors, and accessories. Need help diagnosing sensor issues? Our experts are ready to assist with troubleshooting and part selection.