Funmit 42002-0024S Stack Flue Sensor Replacement for Pentair MasterTemp & Sta-Rite Max-E-Therm – SR200 SR333 SR400

Overview

Meet the Funmit 42002-0024S Stack Flue Sensor, a robust replacement designed for Pentair MasterTemp pool and spa heater electrical systems. Built to withstand the demands of daily use, this sensor helps manage flue gas temperatures and supports smoother heater operation in varied conditions—from cool mornings to busy weekends.

Designed for compatibility, it also fits Pentair Sta-Rite Max-E-Therm pool and spa heater electrical systems models SR200, SR333, and SR400. In other words, if you are replacing an OEM 42002-0024S part, this Funmit option is positioned as a direct substitute that aligns with the existing wiring and connections.

Why choose Funmit 42002-0024S

• Universal compatibility across popular Pentair and Sta-Rite heater models.
• Direct replacement for OEM part 42002-0024S, with straightforward installation.
• Core function: keeps flue gas output within safe ranges and supports a wide operating temperature.
• Durable stainless steel construction with smooth threading for reliable sealing.
• Comprehensive support and a service-forward shopping experience from Funmit.

Key specs and benefits

• Maintains safe flue gas output under 500 degrees Fahrenheit.
• Operating temperature range from -20°C to 105°C, suited to various climates.
• Compatible with commonly encountered error codes such as E-02, E-05, and E-06, potentially reducing nuisance codes.
• High-quality stainless steel and precision threading simplify replacement and reduce the chance of leaks.
• Safe, simple replacement process: power off, wear gloves, and screw in the sensor with standard tooling.

Real-life use scenarios

Homeowners and technicians often choose this sensor when upgrading aging parts in MasterTemp or Max-E-Therm heaters. In practical use, the sensor can be swapped in during routine maintenance, offering a clean, direct fit that aligns with the existing harnesses. The result is a trustworthy part that integrates without major adjustments, supporting continued comfort and reliable pool or spa operation.

Installation tips

• Turn off the heater power and allow components to cool before handling.
• Wear work gloves to protect hands and grip the sensor securely.
• Thread the new sensor by hand to ensure proper alignment, then torque as needed per manufacturer guidelines.
• Inspect surrounding connections after installation and test the system following local safety practices.

Shop with confidence

Funmit offers replacement parts designed to fit your existing equipment, backed by a focus on quality and service. If questions arise or you encounter a mismatch, reach out to our customer service team for guidance and support during installation or post-purchase use.