The Sundance EPROM Chip Rev: 3.56 (Part No. 6660-277) is a high-quality replacement firmware chip designed to control and coordinate the essential operations of your spa system’s circuit board. Engineered for reliable performance and precise system logic, this EPROM interfaces directly with the PCB to manage communication between pumps, heater, sensors, and topside controls. It is compatible with select Sundance spa models that utilize the Revision 3.56 control platform.

• EPROM Chip Sundance Rev: 3.56
• System Firmware Core — Acts as the embedded software that governs spa functions including pump sequencing, heater regulation, filtration cycles, and safety protocols.
• Updated Firmware — Revision 3.56 delivers refined operational logic and improved communication between system components for smooth, stable performance.
• Direct Replacement Fit — Designed to match OEM specifications for easy installation onto compatible circuit boards requiring part number 6660-277.
• Durable Design — Built for long-term reliability within spa control environments, ensuring consistent data retention and dependable operation.
• Reliable Safety Management — Supports accurate monitoring of flow switches, temperature sensors, and high-limit systems to help maintain safe spa operation.
• Compatibility — Compatible with Sundance spa systems utilizing Revision 3.56 firmware on PCB part number 6660-277. Always verify your spa model and existing chip version before ordering to ensure proper fit and function.
• Part no. 6660-277

Why choose this product?
This EPROM chip is essential for restoring proper logic and communication within your Sundance spa system. Replacing a faulty or outdated chip can resolve issues such as system errors, unresponsive controls, incorrect heating behavior, and inconsistent performance—helping return your spa to reliable, efficient operation.