Control Board Replacement Kit for NA and LP Series Pool and Spa Heaters What the kit includes 1 x 420020007S control board 1 x 472610Z film pad Direct replacement for part number 461105 Compatibility Designed for use with MasterTemp NA and LP Series pool and spa heater electrical systems Also fits StaRite MaxETherm NA and LP Series pool and spa heater electrical systems Key benefits and problem solved Restores heater startup and control display functions when the original control board fails Replaces a faulty or unresponsive control module quickly, minimizing downtime Improves reliability with quality components and robust electrical connections Quality and construction Manufactured using materials and processes for durable performance Good insulation and antileakage properties to protect internal electronics Undergoes usage testing, quality inspection, aging testing, and CF testing to ensure consistent performance Manufacturing process follows OSM standards and aims to meet or exceed OEM quality How to confirm you need this kit Heater no longer starts when commanded Control panel display is not illuminated or is unresponsive Intermittent operation or error conditions that trace back to the control board Practical applications and use scenarios a failed control board on a pool heater that will not ignite, restoring normal heating operation the control electronics on a spa heater whose display or control buttons are not responding Stock as a service part for pool equipment technicians to reduce time during routine maintenance Performance notes Designed specifically for the listed heater electrical systems to ensure proper fit and function Intended as a direct functional replacement for the listed part numbers Simple installation guidance Power down and isolate the heater before servicing Remove the old control board and film pad, install the replacement components in the original locations, and reconnect wiring per the original wiring layout After installation, power up and verify that the heater and display operate normally This kit provides the main control board and protective film pad needed to restore control functions in compatible NA and LP Series pool and spa heaters.