K-1039685 Kohler Air Blower Replacement System | Keypad + Control Box

Restore a compatible Kohler BubbleMassage® air bath without replacing the bathtub. This complete aftermarket retrofit system replaces the discontinued Kohler K-1039685 blower and original control electronics with modern, matched components manufactured by CG Air Systems.

• Complete replacement: New blower, separate control box, keypad and communication cable
• Variable-speed airflow: Adjust the air-massage intensity from gentle bubbling to stronger airflow
• Wave and Pulse modes: Select changing massage patterns directly from the keypad
• Heated air: Integrated 120-watt air heater reduces the initial cool-air sensation
• Automatic operation: Includes a 20-minute timer and automatic drying cycle
• Clean keypad installation: Approximately 2-1/2-inch square trim covers an opening up to approximately 1-7/8 inches

Important: This is a complete matched replacement system. The new blower, control box, keypad and cable must be installed together. The replacement components are not designed to operate with the original Kohler keypad or control electronics.

What’s Included

• 700-watt variable-speed CG Air Systems blower
• Integrated 120-watt air heater
• Separate electronic control box
• Replacement electronic keypad
• Keypad communication cable
• Installation instructions
• One-year limited warranty

Specifications

The integrated heater warms the moving air to improve comfort. It does not heat or maintain the temperature of the bathwater.

Why Choose This System?

Choose this system when the existing keypad can be safely removed and you want full variable-speed operation with Wave and Pulse massage modes.

Unlike our integrated-control keypad option, this version keeps the electronic control box separate from the blower. The blower, control box and keypad remain individual matched components while operating together as one complete system.

If the original keypad is permanently bonded to the bathtub or cannot be removed without risking damage, consider our Kohler 1039685 Wireless Remote Blower System.

Want to compare all three options? Read our Kohler 1039685 and 1036210 Blower Replacement Guide.

Confirm Compatibility Before Ordering

Before ordering, confirm:

• The original blower system operates on 120V/60Hz
• The original blower and control-system part numbers
• The existing keypad opening and surrounding flat mounting surface
• The air-line connection and available equipment space
• The electrical circuit, grounding and GFCI protection

The replacement keypad has approximately 2-1/2-inch square trim and is designed to cover an opening up to approximately 1-7/8 inches. Always measure both the opening and the surrounding flat surface before ordering.

If you are uncertain, text clear pictures of the original blower label, keypad, control box and installation area to (951) 897-1878. Whirly Bros can help verify compatibility before you order.

Frequently Asked Questions

Does this system replace the Kohler K-1039685 blower?

It is designed as a complete aftermarket retrofit for compatible 120V/60Hz Kohler K-1039685 air-bath systems. Final compatibility depends on the original voltage, keypad opening, air connection, control configuration and available installation space.

Does this system have variable-speed operation?

Yes. The replacement keypad allows the user to increase or decrease the airflow to achieve the desired massage intensity.

Does the keypad provide Wave and Pulse modes?

Yes. In addition to regular variable-speed operation, the keypad provides Wave and Pulse massage modes that automatically vary the airflow pattern.

What is the difference between this system and the integrated-control system?

Both keypad systems provide variable speed, Wave and Pulse modes. This system uses a separate electronic control box. The other keypad system has the electronic controller built directly into the blower.

Can I reuse the original Kohler keypad or control box?

No. The included blower, control box, keypad and communication cable are designed to operate together as a matched replacement system.

Will the replacement keypad cover the original opening?

The keypad has approximately 2-1/2-inch square trim and is designed to cover an opening up to approximately 1-7/8 inches. Measure the opening and surrounding flat mounting area before ordering.

Does the air heater warm the bathwater?

No. The 120-watt heater warms the air entering the bathtub to reduce the initial cool-air sensation. It does not heat the bathwater.

Why does the blower run again after the bath is turned off?

This is the automatic drying or purge cycle. It helps remove residual moisture from the air lines after use.

Is this an original Kohler product?

No. This is a complete aftermarket retrofit system manufactured by CG Air Systems for compatible Kohler applications. It is not an original Kohler service part.

Installation Notice

Disconnect electrical power before installation. Verify the voltage, circuit capacity, grounding, GFCI protection, air connection and local electrical requirements. Use a qualified installer or electrician whenever electrical work or code compliance is uncertain.

Trademark and compatibility notice: KOHLER® and BubbleMassage® are trademarks of Kohler Co. Manufacturer names and part numbers are used solely to identify the intended application of this aftermarket replacement system. Whirly Bros is not affiliated with, sponsored by or endorsed by Kohler Co.