This control board kit is a direct replacement for the electrical control board used in compatible pool and spa heaters. It provides a reliable option for repairing or maintaining heater electrical systems and is designed to fit the original mounting and connector locations for listed models. Key benefits Directfit replacement for listed heater control boards, minimizing installation time and effort. Restores the electrical control assembly in compatible heaters, helping the unit to normal operation. Suitable for service technicians and homeowners who need a dependable replacement part without extensive modification. Compatibility Fits Pentair MasterTemp NA and LP series pool and spa heater electrical systems. Compatible with MasterTemp 200 250 300 400 400HD control board models. Compatible with StaRite MaxETherm SR200NA SR333NA SE400NA SR200HD SR333HD SR400HD control board models. What it does Replaces the control board within the heater electrical system so the unit can be serviced without replacing the entire heater. Matches the original control board form factor and connector layout for straightforward swapin installation. Practical applications a failed control board to restore operation of a residential pool heater during the swimming season. Keep as a spare part for scheduled maintenance or rapid field repairs by service technicians. Use when troubleshooting intermittent electrical faults to determine if the board is the source of the issue. Notes for buyers Confirm model compatibility before using the heater model numbers listed above. Installation should follow standard electrical safety procedures and local electrical codes.