Control Board Kit 420020007S with 472610Z Switch Membrane Pad Overview A directreplacement control board kit designed for pool and spa heater electrical systems. The kit includes the 420020007S control board and the 472610Z switch membrane pad. It is built for straightforward installation, reliable temperature control, and broad model compatibility. Key benefits Wide compatibility: Works with multiple heater models, reducing the need to source different parts for different units. Compatible with MasterTemp 200, MasterTemp 250, MasterTemp 300, MasterTemp 400, SR200NA, SR333NA, SR400NA, SR200HD, SR333HD, SR400HD, part number 460805, and similar models. Simple replacement: Designed as a direct swap for the original board and membrane pad. Basic hand tools and a few minutes are typically all that are required for installation. Reliable heating control: The control board uses a quality FR2 copperclad plate and a main control chip to support efficient heating, fast temperature response, and stable temperature regulation. DIY friendly but professional recommended: Installation is suitable for experienced DIY users. For performance and safety, professional installation by qualified technicians is recommended. Features Components included: 420020007S control board and 472610Z switch membrane pad. Construction: FR2 copperclad board with a main control chip for consistent operation. Direct replacement design: Fits in place of the original parts to minimize compatibility concerns and installation errors. Straightforward membrane pad replacement: Membrane pad can be fitted in minutes with minimal tools. Compatibility and part references OE reference: 420020007S and 472610Z Replacement part numbers: 420020007S replaces part number 461105; 472610Z replaces part number 420020029Z Compatible with a range of pool and spa heater models including MasterTemp and SR series listed above Installation overview Remove the front and back panels and the of the heater Unscrew the screws securing the circuit board Unplug the connectors from the old board and install the board the membrane pad in its position; installation takes only a few minutes Detailed online tutorials are available and can assist with stepbystep instructions. If uncertain, arrange installation by a qualified technician. Package contents 1 x 420020007S control board 1 x 472610Z switch membrane pad Use scenarios a heater that no longer powers on or that displays control panel errors by replacing the control board and membrane pad. a worn or unresponsive membrane pad to restore keypad responsiveness and accurate temperature input. Keep as a service spare for pool maintenance technicians to reduce downtime during routine repairs. Notes To ensure correct installation and safe operation, professional installation is recommended when users lack relevant electrical experience. If you need assistance with fitment or installation, contact the seller for support.