Replacement Control Circuit Board and Switch Pad Kit Part 42002007S 461105 Replaces: 420020007S control circuit board and 472610Z switch control pad Overview This replacement control circuit board and switch pad kit restores reliable control and temperature regulation for compatible pool and spa heaters. Designed with upgraded power components and waterproof construction, the kit addresses common control panel failures and improves heating response. Key benefits Restores temperature regulation and reliable control when existing board or panel buttons fail. Upgraded voltage stabilizing module with quality filtering capacitors and LM2576HVS power chip for cleaner DC power and faster, more stable output control. quality optocoupler module for improved output response and reliability. Durable, waterresistant construction and sturdy assembly for longlasting operation in heater enclosures. Direct replacement for specified part numbers to minimize installation time. Compatibility Compatible with all NA and LP series pool and spa heater electrical systems. Compatible models include MasterTemp 200, MasterTemp 250, MasterTemp 300, MasterTemp 400. Compatible with StaRite MaxETherm models SR200NA, SR333NA, SR400NA, SR200HD, SR333HD, SR400HD, and model 460805. Material and performance Constructed from quality electronic components and rugged board materials for dependable performance in heater environments. Upgraded power regulation provides stable DC supply to the main control system, improving control accuracy and response time. Waterproofing and reinforced connectors help protect against moisture and corrosion common in pool equipment compartments. Installation notes Before replacing the control board, turn off all power sources to the heater. Open the of the heater and remove the old circuit board. Remove the film pad from the old board and disconnect the wire connector linked to the old board. Install the control board and switch pad as a direct replacement, reconnect wiring and reapply power only after the board is securely mounted. Typical applications a failed control board in a pool heater that is not maintaining set temperature. Restore unresponsive or damaged front panel buttons and switch pad functionality. Upgrade an older board to improve heating response and reduce erratic cycling in spa and pool heater electrical systems. What is included Control circuit board (part listed) Switch control pad (472610Z replacement) This kit provides a straightforward replacement option to resolve control and panel issues while improving the heater control system stability and responsiveness.