NuWhirl IMC-213-01-03-01 Replacement Retrofit Kit

The NuWhirl IMC-213-01-03-01 Replacement Retrofit Kit is the smart, downtime-minimizing upgrade your aging NuWhirl spa needs. Designed to replace the discontinued NuWhirl Main Control, this complete plug-and-play package combines a brand-new control box with a modern white keypad, delivering a fresh installation look and precise control without the expense or hassle of a full system rebuild.

• New control box and matching keypad — a unified upgrade that looks and performs like a factory install.
• White keypad — clean, contemporary styling that blends with most spa interiors.
• Fits IDU-215 & IDU-315 keypad footprints — designed for straightforward replacement in common NuWhirl installations.
• Standard NEMA plug compatibility — if your pump or blower uses a non-traditional connector, you can update the end to a standard NEMA plug style, simplifying wiring.
• Phone-cord keypad connection — reliable, tidy routing that keeps installation clean and organized.
• Safety and compliance — bonding is required to ensure a secure, code-compliant installation.

Compatibility and installation guidance

The retrofit kit is designed for whirlpool tubs or spas that operate a single variable-speed pump or blower. It is not suitable for configurations with multiple pumps or additional equipment.

Have a pump, blower, AND tub light? You need the multi-component solution — see the IMC-213-01-03-01 Image Main Control Replacement ($449.99), which controls all three from a single unit.

Key functions you'll gain

• On/Off control for quick power management
• Speed Up / Speed Down for precise pump or blower tuning
• Wave Mode to create dynamic water flow patterns for spa ambiance
• Pulse Mode for intermittent, massage-like action

Why this retrofit kit delivers real value

Upgrading with the NuWhirl IMC-213-01-03-01 lets you maintain your existing tub footprint while unlocking modern controls and reliable operation. It's ideal for homeowners who want dependable performance, service professionals seeking a cost-effective upgrade, and property managers aiming to minimize downtime during spa maintenance. The plug-and-play design reduces installation time, while flexible wiring options accommodate non-standard pump connections without compromising safety or performance.

Practical scenarios

• You're keeping an aging NuWhirl spa running and want consistent, responsive pump control without a complex rewiring job.
• Your tub uses a single variable-speed pump or blower, and you want enhanced relaxation with Wave and Pulse modes.
• You're retrofitting a setup where the original main control has been discontinued and need a future-proof, compatible solution.

Pro tips and support

To ensure a smooth install, verify your tub configuration matches a single-pump/blower setup. If you're unsure about compatibility or wiring, our team is ready to help. Reach out at 951-897-1878 or whirlybros@gmail.com for expert guidance. Upgrade confidently with the NuWhirl IMC-213-01-03-01 Replacement Retrofit Kit and restore precise, modern control to your spa today.