Pentair 461105 – Control Board Kit (6-Button) for Pool & Spa Heaters Product Overview The Pentair 461105 Control Board Kit is an OEM replacement electronic control board designed for use in Pentair MasterTemp® and Sta-Rite Max-E-Therm® pool & spa heaters. It features a six-button membrane pad and RS-485 communications assembly, delivering accurate control, diagnostics and heater operation reliability. Key Features Full replacement kit including printed circuit board assembly (PCBA), six-button membrane pad and RS-485 communications module. Designed for both natural gas (NG) and propane (LP) heater configurations. Direct replacement for many years of Pentair and Sta-Rite heater models—restores original functionality and user interface. Provides diagnostic feedback, error code display and system status indicators for improved servicing. Technical Specifications Part Number: 461105 Kit Includes: Control board, membrane keypad, communications assembly Compatible Fuel Types: Natural Gas (NG) & Propane (LP) Interface: Six-button keypad with LCD or digital display (varies by model) Compatible Heater Models This control board kit fits select models in the following families: Pentair MasterTemp series (including 125, 200, 250, 280 BTU units) and Sta-Rite Max-E-Therm series. Always verify your heater model and serial number before ordering the kit. Installation Instructions Turn off the heater power supply and shut off the circulation pump. Disconnect electrical and gas supply per manufacturer-specified lock-out procedures. Open the heater access panel, remove the existing control board and keypad, and disconnect ribbon cables and connectors. Install the new 461105 kit—connect the board, keypad, and communications module; secure mounting hardware. Restore electrical and gas supply, power up the heater, and observe startup sequence—monitor for correct keypad operation and absence of error codes. Troubleshooting No display or unresponsive keypad: Verify power supply, fuse on the board, ribbon cable connection and that the kit has been installed correctly. Error codes persist: Check that the board firmware is correct for your heater model, ensure sensors and wiring harnesses are intact, then reset the system. Heater won’t fire or circulate: Confirm the control board is properly grounded and connected, and review wiring diagrams for compatibility. Maintenance Tip Inspect your heater’s control electronics each service interval. If the keypad shows wear, display is fading, or operation becomes erratic, installing the 461105 kit proactively can help avoid downtime and ensure reliable heater performance for the remainder of the equipment’s life.
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