Pentair Stack Flue Sensor – SKU 42002-0024S is a genuine replacement component designed for Pentair Max-E-Therm and MasterTemp pool heaters. This sensor monitors exhaust temperature within the flue system, helping protect the heater from overheating and ensuring safe operation. Ideal for maintaining heater performance, it is a critical part of the electrical safety system. Engineered for precise compatibility and reliable performance, this sensor helps extend the life of your heater while supporting proper system function. ✅ Key Features Genuine Pentair Replacement Part: Designed for exact fit with compatible heater models. Flue Temperature Monitoring: Detects exhaust heat to prevent overheating. Safety Protection Component: Helps safeguard heater operation and internal components. Compatible with Max-E-Therm & MasterTemp: Specifically designed for Pentair heater systems. Durable Construction: Built for long-term reliability in high-temperature environments. Easy Replacement: Installs quickly as part of routine maintenance or repair. ⚙️ Specifications SKU: 42002-0024S Brand: Pentair Product Type: Stack Flue Sensor Compatibility: Pentair Max-E-Therm and MasterTemp Heaters System Type: Heater Electrical System Function: Exhaust Temperature Monitoring Installation: Direct Replacement Application: Pool and Spa Heater Systems Warranty: Manufacturer Warranty