Open and tested The Hayward Universal HC Series Dual-Fuel HDF400 Gas Heater Thermistor FDXLTER1931 is a repair kit specifically designed for Hayward brand pool heaters. Manufactured by Hayward, this thermistor is a crucial component for maintaining the proper temperature control in your pool or spa. Perfect for DIY enthusiasts or professionals looking to repair or upgrade their pool equipment, this replacement thermistor ensures optimal performance and efficiency for your heating system.
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