Upgraded 420020007S Pool Heater Control Board Kit — directfit replacement for MasterTemp 400/300/250 and StaRite MaxETherm SR400/SR333/SR200 Restore reliable heater control without replacing the entire unit. This upgraded kit includes the 461105 control board and the 472610Z switch pad to worn or failed electronics and user interface components on compatible pool heaters. Key benefits Restores full control functionality: Replaces the main control board and switch pad to heater operation and user control. Saves time and cost: Replaces only the failed components instead of the whole heater, reducing time and expense. Upgraded components: Includes an updated circuit board and a matching switch pad for consistent fit and operation. Clear compatibility: Designed for models MasterTemp 400, 300, 250 and StaRite MaxETherm SR400, SR333, SR200 for straightforward replacement. What it does 461105 control board: Manages ignition, safety interlocks, and control signals to the heater. 472610Z switch pad: Replaces the front user interface for temperature setting and mode selection. Key attributes Function: Control board kit for pool heater electronics and user interface. Compatibility: Compatible with MasterTemp 400, 300, 250 and StaRite MaxETherm SR400, SR333, SR200 models. Included parts: 420020007S kit containing 461105 control board and 472610Z switch pad. Performance: Restores original control functions and user input responsiveness when installed correctly. Practical use scenarios Offseason : a failed control board before the swimming season to ensure the heater is ready when needed. Onsite service call: Service technicians can keep this kit on hand to quickly common electronic failures during routine maintenance. Weekend DIY : Homeowners with basic electrical skills can swap the board and switch pad to restore heater operation instead of scheduling extended service. Installation notes Intended as a direct replacement for the listed compatible models. Verify model number before . Basic electrical and mechanical skills required. Disconnect power and follow safety procedures before working on the heater. If unsure, consult a qualified technician to ensure correct installation and system checks. Included in the package 1 x 461105 control board 1 x 472610Z switch pad Kit reference: 420020007S This kit provides the specific replacement electronics and switch pad needed to restore control and user interface functionality on compatible pool heater models.