UNIVERSAL COMPATIBILITY: 42002-0024S Stack Flue Sensor Replacement for Pentair MasterTemp pool and spa heater electrical systems, also fit for Pentair Sta-Rite Max-E-Therm pool and spa heater electrical systems model SR200, SR333, SR400.DIRECT REPLACEMENT: Replaces OEM Part No. 42002-0024S sensor parts. Please double check part # before you buy.FUNCTION: The Stack Flue Sensor prevents the flue gas output from exceeding 500 degrees F, operating temperature from -20°C to 105°C, and fix typical error codes E-02, E-05 and E-06.PREMIUM QUALITY: Made of durable Stainless Steel material with smooth thread, easy to replace and install few minutes. Turn off the power before replacing it and wear work gloves to protect your hands.100% WARRANTY: 42002-0024S Stack Flue Sensor Replacement comes with 30 day limited warranty from Funmit, you can feel a 100% confident buy and enjoy 24 hours pro tech online service. Product Description PRODUCT DESCRIPTION Directly Replaces Replaces OEM Part No. 42002-0024S sensor parts 42002-0024S Stack Flue Sensor Replacement for Pentair MiniMax Heaters This 42002-0024S Stack Flue Sensor replacement fits Pentair MasterTemp pool and spa heater electrical systems Compatibility Replacement High Limit Switch for Pentair Sta-Rite MasterTemp (All Models) & Max-E-Therm Pool Heaters - Models SR200, SR333, SR400 42001-0063s High Limit Switch Made of durable Stainless Steel material with smooth threadEasy to replace and install few minutesThe Stack Flue Sensor prevents the flue gas output from exceeding 500 degrees FOperating temperature from -20°C to 105°CFix typical error codes E-02, E-05 and E-06 Installation Steps Turn off the filter pump and all electrical power to the pool heaterAllow the heater to cool for at least 30 minutes before proceeding to the next stepUnbolt and remove both the upper left and upper right jackets from the heaterDisconnect the wires from the old indoor stack flue sensorRemove the old sensor by turning it counter-clockwise with a ½” open end wrenchInstall new sensor sealing it with RTV sealant before threading it into the exhaust elbow Perfect Solution Funmit will provide a pro tech solution & quality products for every customer to enhance shopping experience from us Confident Buy Every item from Funmit is well inspected and tested by manufacturer, you can get a free replacement or full refund whatever not satisfied 24 Hours Online Service The 24 hours online service help reslove your problems no matter whatever inquiry you meet about our product. You can get a promptly response High Quality