Kohler 1039685 Integrated-Control Blower Replacement Kit | 750W + 300W

Restore a compatible Kohler BubbleMassage® air bath with a modern, high-output replacement system. This complete aftermarket retrofit replaces the discontinued Kohler K-1039685 blower and original control electronics with matched CG Air Systems components.

• No separate control box: The modern electronic controller is built directly into the blower
• Variable-speed airflow: Adjust the massage intensity directly from the replacement keypad
• Wave and Pulse modes: Select changing air-massage patterns from the keypad
• High-output blower: 750-watt blower rated at 9.5 amps
• Heated air: Integrated 300-watt ceramic heater reduces the initial cool-air sensation
• Automatic operation: Includes a 20-minute timer and automatic drying cycle

Important: This version does not use a separate external control box. The electronic controller is integrated into the blower. The supplied blower, keypad and communication cable must be installed together as a matched replacement system.

What’s Included

• 750-watt variable-speed CG Air Systems blower
• Integrated modern electronic blower controller
• Integrated 300-watt ceramic air heater
• Replacement electronic keypad
• Keypad communication cable
• Installation instructions
• One-year limited warranty

Specifications

The 300-watt ceramic heater warms the air entering the bathtub to reduce the initial cool-air sensation. It does not heat or maintain the temperature of the bathwater.

Why Choose the Integrated-Control System?

This system provides full variable-speed operation, Wave mode and Pulse mode without requiring a separate electronic control box. Integrating the controller into the blower reduces the number of separate components that must be mounted in the equipment area.

Choose this option when the existing keypad can be safely removed and you want a streamlined installation with a high-output blower and 300-watt ceramic air heater.

The primary difference between this system and our other keypad option is the controller location. This system has the controller built into the blower. Our other keypad system uses a separate electronic control box.

Want to compare all three replacement 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 electrical circuit can support the 9.5-amp system
• 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 grounding and GFCI protection

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

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

Frequently Asked Questions

Does this kit 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 require a separate control box?

No. The electronic blower controller is built directly into the blower. The main matched components are the integrated-control blower, replacement keypad and communication cable.

Does the keypad provide variable-speed operation?

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

Does this system provide Wave and Pulse modes?

Yes. The replacement keypad provides variable-speed airflow along with Wave and Pulse massage modes.

What is the difference between this system and the separate-control-box system?

Both systems provide variable-speed airflow, Wave mode and Pulse mode. This version has the controller built directly into the blower. System 1 uses a separate electronic control box.

Can I reuse the original Kohler keypad or control electronics?

No. The replacement blower, integrated controller, keypad and communication cable are designed to operate together. Do not connect the new blower to the original Kohler controls.

What is the air-heater wattage?

This system includes a 300-watt ceramic air heater. The blower is rated at 750 watts, and the complete 120V/60Hz system is rated at 9.5 amps.

Will the replacement keypad cover the original opening?

The keypad has approximately 2-inch square trim and is designed for an opening of approximately 1-7/8 inches. Measure the opening and surrounding flat surface before ordering.

Why does the blower turn on again after the bath is turned off?

This is the automatic drying cycle. The blower runs for approximately one minute around 20 minutes after shutoff to help remove residual moisture from the air lines.

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 equipment nameplate, 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.