Replacement control board kit model 420020007S with 472610Z switch membrane pad. Designed as a direct replacement kit for compatible pool and spa gas heaters, this assembly restores control panel functions and user input reliability. Key benefits Restores heater control and diagnostics: replaces a failed control board to bring back ignition, temperature regulation, and error reporting. Fixes unresponsive keypad buttons: includes the 472610Z switch membrane pad to renew tactile response and reliable button contact. Directfit replacement: matches original part numbers 420020007 and 420020007S for straightforward installation and wiring compatibility. Saves troubleshooting time: resolves common controlrelated faults without replacing the entire heater. Durable and accurate interface: designed to maintain consistent electrical contacts and stable control signals under normal operating conditions. Primary functions and attributes Function: control board manages ignition, thermostat setpoint control, and system diagnostics; membrane pad provides user interface for keypad entry. Kit contents: control board (420020007S) and switch membrane pad (472610Z). Compatibility: compatible with Pentair Mastertemp and MaxETherm natural gas heaters, including compatible NA and LP series pool and spa heaters; verify original part numbers before . Size and fit: designed to match the original mounting points and connector layout for plugandplay replacement in compatible heater models. Performance: restores original control responsiveness and diagnostic feedback when replacing a malfunctioning board or worn membrane pad. Installation notes with unit powered off and follow all safety and electrical precautions in the heater manual. Confirm that the part numbers 420020007S and 472610Z match the service parts list for your heater model prior to installation. Professional installation is recommended if you are not familiar with gas appliance electronics. Use scenarios a control board after a surge or component failure leaves the heater unable to ignite or show error codes. Renew the keypad interface when buttons become unresponsive, intermittently working, or require excessive force to operate. Perform targeted repairs during preseason maintenance to restore full control functionality without replacing the entire heating unit. Check compatibility and part numbers before ordering to ensure this kit is the correct replacement for your heater model.