Replacement Control Pad Size PadMS2 Overview This replacement control pad restores user input and temperature control for compatible pool and spa heater electrical systems. Use it when the main temperature control pad fails to respond or the heater no longer adjusts temperature correctly. Key benefits Restores button responsiveness and temperature adjustment to the heater control system. Direct replacement for worn or unresponsive control pads, avoiding the need for a full control board replacement. Simple installation design that connects to the existing heater electrical system and control board. Compatible with listed heater models and part numbers for straightforward identification. Features and attributes Size: PadMS2 for direct fit. Function: Replacement membrane style control pad used to operate temperature settings and system controls on pool and spa heaters. Performance: Returns reliable user input and normal temperature adjustment when original pad fails. Replacement part numbers: 420020029Z and 472610Z. Compatibility Compatible with the following heater models and related electrical systems: MaxETherm pool and spa heater electrical systems Mastertemp 400 Mastertemp 300 Mastertemp 200 Mastertemp 125 Low Nox SR333NA and SR200NA pool heater models When to The heater no longer changes temperature when controls are used. Buttons on the main temperature control pad do not respond or are intermittently responsive. Visible wear, tearing, or delamination of the control pad surface. Use scenarios the control pad on a pool heater when the temperature setting no longer responds and you need to restore normal operation. Install during routine heater maintenance to a worn or sticky keypad and improve user control reliability. Swap the pad after water exposure or physical damage to the original keypad to regain full control of spa temperature and system functions. What is included One replacement control pad, size PadMS2, matching the listed replacement part numbers. Notes Confirm model compatibility and replacement part numbers before to ensure a correct fit. This product is intended as a direct control pad replacement for the models listed in the compatibility section.