DEHOMKUS 42002-0024S Stack Flue Sensor for Pentair Sta-Rite MasterTemp Max-E-Therm Pool and Spa Heater – Replaces SR200 SR333 SR400

["DEHOMKUS 42002-0024S stack flue sensor is a direct replacement for the OEM part. For Pentair MasterTemp (125/250/400),for Max‑E‑Therm (SR200/SR333/SR400) pool and spa heater electrical systems. No cutting or splicing – just remove the old sensor and install this one for a perfect, plug‑and‑play fit","If your pool heater keeps shutting down or displays E‑02, E‑05, or E‑06 error codes, the stack flue sensor is often the culprit. This replacement sensor monitors flue gas temperature and prevents it from exceeding 500°F, restoring normal heating operation and eliminating frustrating error messages that interrupt your swim","Crafted from stainless steel with precision‑machined threads for a secure seal. Operates reliably in temperatures from -20°C to 105°C (-4°F to 221°F). Resists rust, pool chemicals, humidity, and extreme thermal exposure – built to last through many seasons of heavy use","Heat‑Resistant Wire Insulation—Prevents Melting and Cracking. Unlike standard sensors, our 42002-0024S features high-temperature-resistant wire insulation that has been rated for reliable operation up to 572°F (approximately 300°C). This eliminates the risk of wire insulation melting, aging, or cracking—common failure points in standard replacement sensors","Installation is simple: turn off power and gas, remove the old sensor, screw in the new one, and reconnect the two spade connectors. Safety reminder: always wear work gloves and shut off the heater before starting"]