The Pentair® MiniMax® Circuit Board is a common part that will need to be replaced periodically on your Pentair® MiniMax® Pool Heater. It is usually time to replace this part when you can notice odd readings coming from your heater, or signs of wear and tear over time which can begin to affect the performance of your heater. Please see owners manual for full diagnostics descriptions for your heater. This board is used only on Pentair® MiniMax® Pool & Spa heaters. Find the alternate Pentair® Control Boards Below: Pentair® MiniMax® NT Circuit Board with Dual Knob 6800 Control Plate. Pentair® MiniMax® NT Circuit Board - DDTC Digital Control. Pentair® MiniMax® Circuit Board Replacement Features: Features Compatibility: All Pentair® Pool & Spa Heaters Listed Below: MiniMax NT® (Not Compatible with DDTC Digital Control) MiniMax Plus® PowerMax® MiniMax CH150 IID® MiniMax® Commercial Purex Triton® MiniMax® MiniMax® Low NOx models Manufacturer:Pentair Pool Products Inc.® Model: 470179