Control board with switch membrane pad, part number 420020007S Compatible with Pentair MasterTemp NA LP pool and spa heaters Key benefits Restores user controls and responsiveness: replaces a faulty control board or worn membrane pad to bring back reliable button input and control panel operation. Directfit replacement: designed to match the original part number 420020007S for a straightforward installation that aligns with existing mounting and connector locations. Durable membrane pad: flexible polymer switch pad provides consistent tactile feedback and longterm durability for regular use. Maintains heater function: the board handles user input and control signals, helping the heater respond correctly to temperature and mode settings. Practical performance: compact PCB design with the correct connector interface for the compatible heater models, minimizing modification or rewiring. Product details Function: control board and integrated switch membrane pad that manage user inputs and interface signals for the heater control panel. Compatibility: fits Pentair MasterTemp NA LP pool and spa heater models that use part number 420020007S. Construction: printed circuit board paired with a flexible polymer membrane pad sized to match the original control panel layout. Installation: designed for replacement using common hand tools. Intended for technicians or experienced DIYers. Disconnect power before servicing. Use scenarios a worn or unresponsive button pad so pool users can reliably change temperature and operating modes from the heater control panel. Swap a failed control board after intermittent start or control panel errors to restore normal heater control functions. Install during routine heater maintenance to refresh the user interface and avoid downtime during peak pool season. Part number reference: 420020007S Compatibility note: intended for use in Pentair MasterTemp NA LP pool and spa heaters that specify this part number.