420020007S Control Board Kit for Pentair MasterTemp and StaRite MaxETherm Pool and Spa Heaters Compatibility Designed for Pentair MasterTemp NA and LP series pool and spa heaters Fits MasterTemp 200, 250, 300, 400, and 400HD control boards Compatible with StaRite MaxETherm SR200NA, SR333NA, SE400NA, SR200HD, SR333HD, and SR400HD models Quality Construction Built from FR2 copper foil laminate for strength and durability Features upgraded solidstate capacitors for improved stability and longer service life Includes precision soldering for secure component connections Robust SR waterproof coating offers insulation and moisture resistance, protecting against electrical leakage Advanced Protection Features Equipped with upgraded power chips for consistent performance Improved optocoupler module ensures precise signal control Regulated power module provides multiple layers of protection including overheat, overvoltage, and short circuit prevention Enhanced Function and Performance Restores and optimizes heater performance when the existing control board fails Helps reduce pump running time and improve heating efficiency, lowering energy and operational costs Resolves common issues such as heater not starting, unlit display, or slow water heating Applications Ideal replacement when your pool heater control board fails due to electrical issues or environmental wear Suitable for residential pool owners seeking better heating efficiency and reliable operation Valuable for spa setups requiring precise temperature control and dependable system performance Dimensions and Fit Directfit design for quick installation without modifications OEMcompatible layout ensures seamless integration with existing components This 420020007S control board kit delivers reliable operation, extended durability, and improved heating efficiency for Pentair MasterTemp and StaRite MaxETherm heater systems, making it a practical solution for maintaining comfortable water temperatures in both pool and spa applications.