420020007S Control Board Kit Replacement with 472610Z Switch Membrane Pad Overview This control board kit is a direct replacement designed to restore control functions on compatible pool and spa heaters. The kit includes the 420020007S control board and the 472610Z switch membrane pad for a complete replacement of the user interface and electronics. Key benefits Restores reliable heater control: Replaces a failed or intermittent control board to recover ignition, temperature regulation, and safety monitoring. Complete kit for straightforward : Includes both the control board and the membrane switch pad so you do not need to source parts separately. Directfit compatibility: Designed to match original mounting points, connectors, and switch locations for compatible heater models. Durable components: The kit uses a standard printed circuit board and a flexible membrane pad built for repeated use in heater control applications. Reduces downtime: Replacing the board and membrane pad together minimizes diagnostic time and returns equipment to service faster. What it does Replaces the electronic control module that manages ignition sequencing, user interface inputs, and safety interlocks. Replaces the membrane switch assembly that provides tactile controls and seals the control panel. Compatibility Compatible with these heater models: MasterTemp 200, 250, 300, 400 MaxETherm SR200, SR333, SR400 Kit contents Control board 420020007S Switch membrane pad 472610Z Performance and fit Directfit replacement for the listed models, matching factory connectors and mounting. Restores original control behavior and user input response when installed correctly. Designed for use in pool and spa heater control panels where the original parts have failed or become unresponsive. Typical applications and use scenarios Replacement after failure: Swap in the control board kit when a heater will not ignite, displays error codes related to control electronics, or the front panel buttons stop responding. Preventive maintenance: Keep a replacement kit on hand for service fleets or facilities that need quick repairs to minimize downtime during peak season. Component upgrade during refurbishment: Use the kit when refurbishing older heater units to an aging control board and worn membrane pad at the same time. Installation notes Intended for trained technicians or qualified service personnel familiar with heater controls and safety procedures. Verify power is disconnected before starting work. Ensure proper reconnection of all wiring harnesses and secure mounting to restore original grounding and enclosure sealing. Part numbers Control board: 420020007S Membrane pad: 472610Z This kit provides the compatible replacement components needed to restore control panel function on the listed heater models. the control board and switch membrane pad together to simplify and the unit to normal operation.