NuWhirl CAST-201 Control Replacement Guide | Balboa 99633
Trying to replace a discontinued NuWhirl TouchStone CAST-201 bath control? The complete number on the original label matters. Although several CAST controls look nearly identical, they were programmed for different loads, operating speeds, timers and purge functions.
The programmable Balboa 34-99633-K bath control, also identified as control number 99633, can replace six common CAST-201 configurations when the correct program is selected. It does not replace every CAST or AST control.
Independent compatibility guide: Manufacturer names, trademarks and part numbers are referenced solely to identify original equipment and explain replacement compatibility. Whirly Bros is an independent replacement-parts retailer and is not affiliated with or endorsed by NuWhirl Systems or Jason International.
Important compatibility exclusions
The Balboa 34-99633-K does not replace the CAST-201-01-01-03A with its original 2-minute pump timer, the CAST-201-01-01-04E heater control, or AST-201-01-01-02 controls equipped with the 24-hour timer used by Jason Hydrotherapy/Jason International.
CAST-201 to Balboa 99633 replacement chart
Find the complete model number on the label of the original control. Match both the base number and final letter before selecting the replacement program.
| Original NuWhirl control | Original application | Balboa 99633 compatibility |
|---|---|---|
| CAST-201-01-01-03A | Single-speed pump with a 2-minute timer | Not compatible. Current replacement timers operate for 20 minutes. |
| CAST-201-01-01-03B | Multi-speed blower with a 20-minute timer and purge cycle | Program #2 |
| CAST-201-01-01-03C | Single-speed pump with a 20-minute timer | Program #3 |
| CAST-201-01-01-03D | Variable-speed blower with a 20-minute timer and purge cycle | Program #2 |
| CAST-201-01-01-04A | Multi-speed blower with a 20-minute timer and purge cycle | Program #1 |
| CAST-201-01-01-04B | Single-speed blower with a 20-minute timer and purge cycle | Program #3 |
| CAST-201-01-01-04D | Multi-speed blower configured for deep-water or walk-in tub applications | Program #1 |
| CAST-201-01-01-04E | Heater control with a 30-minute pulse program | Not compatible. No direct replacement is currently available. |
Do not assume a control is compatible based only on its appearance. A control programmed for a blower may operate differently from one intended for a single-speed water pump, deep-water application or heater.
Jason Hydrotherapy AST-201 24-hour timer warning
Some Jason Hydrotherapy, also known as Jason International, bath systems used an AST-201-01-01-02 control with a 24-hour timer. The Balboa 34-99633-K is not a replacement for that specialized timer.
If the original label shows AST-201-01-01-02, do not order the 99633 based solely on the similar enclosure or plug arrangement. Send Whirly Bros a clear photograph of the label and connected equipment so the complete system can be evaluated.
What the four Balboa 99633 programs do
The 34-99633-K is a compact 120-volt, air-button-operated bath control with a 20-minute operating timer. Its LED changes color to identify the selected program.
- Program #1 — Red LED: Three-speed blower operation with a 20-minute timer and purge cycle.
- Program #2 — Green LED: Multi-speed blower operation with a 20-minute timer and purge cycle.
- Program #3 — Blue LED: Standard on/off operation with a 20-minute timer.
- Program #4 — Turquoise LED: Three-speed blower operation with a 20-minute timer and no purge cycle.
The correct program is determined by the original control number and application—not simply by which operating pattern sounds preferable.
How to identify the correct replacement
- Turn off electrical power to the bathtub equipment before opening the access panel.
- Photograph the complete label on the original control box.
- Record the entire model number, including the 03 or 04 base number and final letter.
- Identify whether the connected load is a water pump, air blower or heater.
- Check whether the original system has a purge function or an unusual timer such as 2 minutes or 24 hours.
- Match the label to the compatibility chart above or contact Whirly Bros before ordering.
Free compatibility help
Text clear photographs of the control label and connected pump, blower or heater to (951) 897-1878. Whirly Bros will help determine whether the Balboa 99633 is appropriate before you order.
Add wireless operation with the Balboa 99638 remote
Optional Balboa 99638 waterproof remote
The Balboa 99638 remote is specifically designed as an optional wireless control for the Balboa 99633 control box. It lets the user operate the compatible bath function from inside the tub without reaching for the pneumatic air button.
- Pairs wirelessly with the Balboa 99633 control box
- Provides convenient handheld operation from inside the bathtub
- Waterproof design made for bath applications
- Optional upgrade—the 99633 can still operate with its compatible pneumatic air button
- Remote is sold separately from the control box
Frequently asked questions
Does the Balboa 99633 replace the CAST-201-01-01-04A?
Yes. Select Program #1 for the 04A multi-speed blower application with a 20-minute timer and purge cycle.
Which program replaces CAST-201-01-01-03B and 03D?
Program #2 is used for both the 03B multi-speed blower and the 03D variable-speed blower configurations.
Which program replaces CAST-201-01-01-03C and 04B?
Program #3 is used for the 03C single-speed pump and 04B single-speed blower applications.
Can the 99633 replace a CAST-201-01-01-03A?
No. The 03A used a 2-minute pump timer. The available 99633 programs use a 20-minute timer and are not a direct replacement.
Can it replace a CAST-201-01-01-04E heater control?
No. The 04E controlled a heater using a specialized 30-minute pulse program. There is currently no direct replacement.
Does it replace the Jason International AST-201-01-01-02?
No. It does not replace AST-201-01-01-02 controls equipped with the 24-hour timer used in certain Jason Hydrotherapy/Jason International systems.
Are the pneumatic air button and tubing included?
The air button and tubing are normally sold separately unless the product listing specifically identifies them as included. Existing components may sometimes be reused when they are undamaged and compatible.
Can a wireless remote be added to the Balboa 99633?
Yes. Balboa identifies part number 99638 as the optional remote control for the 99633. The remote is sold separately and must be paired with the control box before use.
Order the Balboa 34-99633-K replacement control
If your original control is shown as compatible in the chart, view the Balboa 34-99633-K programmable bath control. Whirly Bros specializes in identifying and replacing discontinued whirlpool bath pumps, blowers, keypads and control systems.
View the Balboa 34-99633-K Control
Technical review: Whirly Bros independently prepared this guide using publicly available technical specifications and practical experience identifying and replacing discontinued bath controls.
Trademark, compatibility and authorship notice: NuWhirl, TouchStone, Jason Hydrotherapy, Jason International, Balboa Water Group and any other manufacturer names, trademarks, model numbers and part numbers referenced in this guide remain the property of their respective owners. They are used solely to identify original equipment and explain potential replacement compatibility. Whirly Bros is an independent replacement-parts retailer and is not affiliated with, sponsored by, authorized by or endorsed by NuWhirl Systems, Jason International or any other referenced original equipment manufacturer unless expressly stated. This guide is independently written and does not reproduce any manufacturer logo, photograph, drawing, manual or copyrighted product description. Compatibility information is provided for identification assistance and does not replace the equipment manufacturer's installation or safety instructions. Customers must verify the complete original label, connected load and operating requirements before purchasing or installing a replacement.
Electrical safety: Disconnect power before inspecting or servicing bathtub equipment. Installation must follow the control manufacturer's instructions and applicable electrical codes. Use a qualified technician or electrician when required.