42002-0007S Control Board Kit Compatible with MasterTemp and Sta-Rite Max-E-Therm Pool Heaters

Control Board Kit for MasterTemp and Max-E-Therm Heaters This 42002-0007S control board kit is designed as a direct replacement for the electrical control systems in MasterTemp NA and LP series pool and spa heaters, including the MasterTemp 200, 250, 300, 400 and 400HD models. It is also compatible with Sta-Rite Max-E-Therm heaters in the SR200NA, SR333NA, SE400NA, SR200HD, SR333HD and SR400HD configurations. If your heater fails to start, the display remains unlit, or the water heats slowly, this control board kit offers a straightforward solution to restore reliable operation. Built for Reliability The control board is manufactured using premium FR-2 copper foil laminate, which provides excellent insulation and moisture resistance. A robust SR waterproof coating adds further protection against leakage and environmental wear, making the board well suited to the damp conditions often found around pool and spa equipment. Upgraded solid-state capacitors and high-precision soldering techniques contribute to a more dependable connection and longer service life. Improved Performance and Protection This kit includes an improved optocoupler module and a regulated power module, delivering overheat, overvoltage and short circuit protection. These features help the heater respond more quickly to temperature changes and operate more efficiently, which can reduce pump running time and lower operational costs. The result is more consistent heating performance and greater peace of mind throughout the swimming season. What to Expect This replacement control board kit is designed for use in compatible MasterTemp and Max-E-Therm heater systems. With its combination of durable materials, protective coatings and upgraded internal components, this control board kit is a practical choice for keeping your pool or spa heater running smoothly.