K-1039685 Kohler Air Blower Replacement System | Complete Kohler BubbleMassage® Retrofit Kit

Replace Your Discontinued Kohler Air Bath System with a Modern, Reliable Upgrade

Bring your luxury bathtub back to life with the K-1039685 Kohler Air Blower Replacement System from Whirly Bros. Designed and manufactured by CG Air Systems, this complete retrofit kit replaces the discontinued Kohler K-1039685 air massage system with modern electronics, a powerful variable-speed blower, integrated air heater, and an easy-to-use keypad.

Instead of spending hours searching for obsolete Kohler parts or attempting to repair aging electronics, this complete replacement system gives you everything needed to restore your Kohler BubbleMassage® air bathtub with dependable performance and readily available replacement components.

Whether you're a homeowner, plumber, contractor, or remodeling professional, this retrofit delivers a quieter, more reliable, and easier-to-service air massage system designed to provide years of worry-free operation.

Why Upgrade Your Kohler Air Bath?

Many original Kohler BubbleMassage® systems are now over 15–20 years old. As electronic components age, failures become increasingly common, while genuine replacement parts become difficult—or impossible—to find.

Rather than replacing your entire bathtub, this retrofit allows you to modernize the air massage system while preserving the beauty and comfort of your existing Kohler bath.

Benefits include:

✔ Complete replacement of discontinued air bath electronics

✔ Modern variable-speed blower technology

✔ Built-in heated air for warmer bubble massages

✔ Quiet operation

✔ Reliable electronic controls

✔ Easy future serviceability

✔ Long-term replacement part availability

It's the smartest way to extend the life of your Kohler air bath without the cost of a complete bathroom remodel.

Complete Retrofit Kit – Everything You Need

Unlike piecing together individual components, this system is engineered as one complete package.

Included in the kit:

• Variable Speed Air Blower
• Electronic Control Box
• Modern Electronic Keypad
• Communication Cable
• Installation Instructions

Every component has been designed to work together for dependable operation and simplified installation.

Designed to Fit Your Existing Kohler Tub

One of the biggest challenges when replacing discontinued Kohler systems is finding a keypad that properly fits the original opening.

Our replacement keypad solves that problem.

The attractive 2-1/2-inch square trim bezel completely covers the original 1-7/8-inch keypad opening, creating a clean, factory-quality appearance without additional trim plates or cosmetic repairs.

Installation is quick and secure using industrial-strength 3M™ adhesive backing, eliminating unnecessary hardware and making installation simple for both professionals and experienced DIY homeowners.

Powerful Variable-Speed Bubble Massage

The heart of this retrofit is the high-performance 700-Watt variable-speed air blower.

Enjoy complete control over your bathing experience with adjustable airflow ranging from a gentle relaxing bubble massage to a vigorous therapeutic air massage.

Features include:

• 700-Watt Variable Speed Blower
• Adjustable Bubble Intensity
• Quiet Operation
• Energy Efficient Performance
• Smooth Electronic Speed Control

Whether you're looking for a peaceful evening soak or a revitalizing massage after a long day, this blower delivers consistent performance every time.

Built-In Heated Air for Maximum Comfort

Cold air can reduce the enjoyment of an air bath.

That's why this blower includes an integrated 120-Watt air heater that gently warms the air entering your bathtub.

Benefits include:

• Warmer bubbles
• More comfortable soaking experience
• Reduced cold air sensation
• Increased bathing comfort

The heater works automatically with the blower to enhance every bath.

Intelligent Electronic Controls

Modern controls make operating your bathtub easier than ever.

Features include:

• Variable Speed Operation
• Multiple Massage Levels
• Automatic 20-Minute Timer
• One-Touch Keypad Control
• Reliable Electronic Circuitry

These upgraded controls eliminate many of the reliability problems commonly found in aging OEM systems.

Compact Design Makes Installation Easier

The compact control box and blower are designed specifically for retrofit applications.

Their smaller footprint makes installation easier in existing equipment bays while allowing convenient access for future maintenance.

Ideal for:

• Bathroom renovations
• Kohler air bath repairs
• Discontinued blower replacements
• Aging electronic upgrades

Common Problems This System Solves

If your Kohler air bath is experiencing any of these symptoms, this retrofit may be the solution.

• Air blower won't turn on
• Weak or inconsistent bubbles
• Loud blower motor
• Air blower trips the breaker
• Keypad not responding
• Control box failure
• Air heater stopped working
• Discontinued replacement parts
• Intermittent blower operation
• Electronic control failure

Replacing the entire system is often faster, more reliable, and more cost-effective than attempting to repair aging electronics.

Compatible With Many Kohler BubbleMassage® Systems

This retrofit is commonly used to replace discontinued Kohler air massage systems including:

• K-1039685
• 1039685
• Kohler BubbleMassage® Air Baths
• Older Kohler Air Massage Systems
• Kohler Air Tub Blower Assemblies

Not sure if this is the correct replacement?

Contact Whirly Bros with your bathtub model number or photos, and we'll help identify the proper system before you order.

Expert Tip from Whirly Bros

We've worked with Kohler air bath systems for years and have helped countless homeowners, plumbers, and contractors replace discontinued blower systems. One of the biggest mistakes we see is spending time and money trying to repair aging OEM electronics that are already beyond their service life.

In most cases, replacing the complete blower, keypad, and control system provides a more reliable long-term solution while eliminating future compatibility issues.

If you're unsure which replacement your tub requires, our team is happy to help identify the correct system before you purchase.

Why Buy From Whirly Bros?

Unlike general plumbing suppliers, Whirly Bros specializes in whirlpool and air bath replacement systems.

Our customers choose us because we offer:

• Expert product identification
• First-hand industry experience
• Fast technical support
• Same-Day Shipping on most orders
• Fast shipping from California
• Carefully selected retrofit solutions
• Hard-to-find replacement parts
• Friendly customer service before and after the sale

We don't just sell bathtub parts—we help homeowners keep luxury bathtubs operating long after manufacturers discontinue original components.

Technical Specifications

• Manufacturer: CG Air Systems
• Replacement For: Kohler K-1039685
• Voltage: 120 Volt
• Blower Output: 700 Watts
• Built-In Air Heater: 120 Watts
• Variable Speed Operation
• Automatic 20-Minute Timer
• Electronic Keypad
• 2-1/2" Square Trim Bezel
• Covers Original 1-7/8" Opening
• High-Strength 3M™ Mounting
• Complete Retrofit System

Frequently Asked Questions

Does this replace the Kohler K-1039685 air blower system?

Yes. This complete retrofit replaces the discontinued K-1039685 air massage system with modern components designed for reliable long-term operation.

Does the blower include a heater?

Yes. The blower includes an integrated 120-Watt air heater that gently warms the air entering the bathtub for a more comfortable bubble massage.

Will the new keypad fit my existing hole?

Yes. The new keypad features a larger 2-1/2-inch trim bezel designed to completely cover the original 1-7/8-inch keypad opening for a clean finished appearance.

Is this quieter than the original blower?

Yes. Modern blower technology provides quieter operation while delivering excellent airflow and massage performance.

Can I install this system myself?

Many experienced DIY homeowners successfully install this retrofit. However, if you are unfamiliar with electrical wiring or bathtub equipment, we recommend hiring a qualified installer.

Why replace the entire system instead of one component?

Because many original Kohler components are discontinued, replacing the complete system eliminates compatibility issues, improves reliability, and makes future servicing much easier.

Shop with Confidence

When you purchase from Whirly Bros, you're buying from specialists who work with discontinued whirlpool and air bath systems every day. Our goal is to help you restore your bathtub quickly, avoid costly mistakes, and enjoy years of dependable performance.

Need help confirming compatibility? Contact Whirly Bros before ordering, and we'll help you identify the correct replacement for your Kohler air bath.