Pentair 470179 Electronic Thermostat Circuit Board Replacement for Pool and Spa Heaters Genuine Pentair Replacement Part Fits Pentair MiniMax Plus, Pentair MiniMax CH 150 IID, MiniMax with CSD-1 Control, and MiniMax Low Nox Fits Commercial MiniMax and PowerMax Models Manufactured Prior to July 2006 Fits PowerMax Models 150, 200, 250, 300, 350, and 400