73533-AA Kohler Variable Speed Whirlpool Pump Replacement Kit | OEM Fit

Kohler K-73533 Whirlpool Pump Replacement Retrofit – Variable-Speed System

Restore your discontinued Kohler 73533-AA whirlpool system with a complete modern replacement from Whirly Bros. This retrofit replaces the original pump, electronic controls, control cable, and keypad with a new 120V variable-speed whirlpool pump and modern Touchstone electronic control system.

The original Kohler 73533-AA components are discontinued, making individual replacement parts increasingly difficult to locate. Our complete retrofit provides a practical, modern solution without relying on obsolete electronics.

This system features a 3-button, tub-mounted keypad with adjustable pump speed, automatic shutoff, and optional LED lighting control.

Key Features

• Complete replacement for discontinued Kohler 73533-AA / K-73533 whirlpool pump systems.
• New 120V, 8.5A variable-speed whirlpool pump.
• Touchstone electronic pump control system.
• Modern white 3-button keypad.
• Adjustable pump speed using the keypad's increase/decrease controls.
• Automatic 30-minute pump shutoff timer.
• Optional LED chromatherapy lighting control.
• Replacement keypad trim designed to cover the original Kohler keypad opening.
• New electronic controls eliminate the need for the original discontinued control cable.

3-Button Keypad Operation

Jets / Pump Button (Left)
Press once to activate the whirlpool pump and begin a 30-minute operating cycle. Press again to turn the pump off at any time.

Variable-Speed Adjustment (Center)
The center keypad controls pump speed. Press and hold the upper arrow to increase pump speed or the lower arrow to decrease pump speed. Release the button when the desired speed is reached.

LED Light Button (Right)
The keypad includes a dedicated light button for an optional LED tub light. When a compatible LED light and cable are installed, this button activates the light and allows you to cycle through available colors.

Available lighting selections include Rainbow, Blue, White, Aqua, Green, Yellow, Red, and Magenta. Press and hold the light button to turn the light off. The lighting system also features a 30-minute timer.

Important: The LED light and connecting cable are optional accessories and are not included with this replacement kit.

Replacement Keypad Dimensions & Compatibility

The included white 3-button keypad has an approximate outer trim size of 2-1/8" × 3".

The original Kohler keypad fits into an approximately 1-7/8" diameter mounting hole. The replacement keypad's larger rectangular trim can cover the existing opening, providing a clean, updated appearance without leaving the original mounting hole exposed.

This makes the replacement keypad particularly useful when upgrading an older Kohler whirlpool tub where the original electronic keypad is no longer available.

Installation Note: Verify that the existing opening is properly positioned and that sufficient flat mounting space is available. The surrounding tub surface and keypad mounting clearance should be checked before installation.

Technical Specifications

• Replaces: Kohler 73533-AA / K-73533
• Electrical: 120V, 60Hz
• Pump: 8.5A variable-speed whirlpool pump
• Control System: Touchstone variable-speed electronic controller
• Keypad: White 3-button tub-mounted keypad
• Speed Control: Adjustable variable speed
• Automatic Timer: 30 minutes
• Lighting Control: Optional LED chromatherapy
• Keypad Trim: Approximately 2-1/8" × 3"
• Original Keypad Opening: Approximately 1-7/8" diameter
• Heater: Not included; external inline heater available separately

What's Included

• 120V, 8.5A variable-speed whirlpool pump
• Touchstone variable-speed electronic control box
• White 3-button electronic keypad
• Pump union fitting
• Installation instructions

Installation Information

Plumbing: In most installations, the replacement pump can connect to the existing whirlpool plumbing with little or no PVC cutting or gluing. Confirm the existing plumbing configuration before installation.

Align the pump union squarely before tightening. The included O-ring provides the watertight seal. Hand-tighten the union and do not apply Teflon tape or pipe thread sealant to the union threads.

Electrical: This replacement operates on 120V and must be connected to a properly protected GFCI circuit that meets the system's electrical requirements. Do not connect directly to a 240V power supply.

Pump Mounting: The original Kohler pump base must be removed because it may not properly accommodate the replacement motor. Secure the new pump on a stable, level mounting surface.

Keypad Installation: The larger rectangular keypad trim is intended to cover the original Kohler keypad opening. Confirm the existing hole dimensions, mounting clearance, and surrounding surface before installation.

Important Heater Information

The original Kohler K-73533 whirlpool pump assembly included a heater. This replacement system does not include a heater.

Customers who want to maintain bathwater temperature during operation may purchase a compatible external inline whirlpool heater separately.

Contact Whirly Bros for assistance selecting the correct heater configuration for your installation.

Prefer a Wireless Remote?

Whirly Bros also offers a Kohler 73533-AA three-speed wireless remote replacement system.

The wireless remote version provides High, Medium, and Low pump speeds without requiring installation of a new tub-mounted keypad.

Note: The wireless remote version does not provide Wave or Pulse modes. This Touchstone keypad version provides adjustable variable-speed operation and optional LED light control, but Wave and Pulse modes are not specified features of this system.

Whirly Bros Compatibility Support

With more than 40 years of combined whirlpool industry experience, Whirly Bros specializes in replacement pumps, electronic controls, and retrofit solutions for discontinued whirlpool bath systems.

Need help confirming compatibility? Send us clear photos of your original pump label, keypad, plumbing connections, and available installation space.

Call or Text: (951) 897-1878

Whirly Bros – Replacement Parts for Discontinued Whirlpool Systems.

Compatibility Notice: Kohler® is a registered trademark of Kohler Co. Manufacturer names and part numbers are used solely for identification and compatibility purposes. This aftermarket replacement system is not manufactured, sponsored, authorized, or endorsed by Kohler Co.