Vacuum Motor Circuit Board Dual Motor 28 Amp 120V – M.D. S44 1 or 2 Motor Large Circuit Board #235L

Vacuum Motor Circuit Board Dual Motor 28 Amp 120V – M.D. Part #235L

This M.D. dual motor vacuum circuit board is a large replacement control board designed for select central vacuum power units using one or two motors. It is rated for 28 amps at 120 volts and includes the key components needed to control motor operation and low voltage activation.

The board contains a relay, transformer, two 18 amp mini breakers, and two pairs of low voltage leads. The control module measures approximately 2 inches high from the circuit board to the top of the reset button.

Key Features

• M.D. replacement large circuit board
• Designed for select 1 or 2 motor central vacuum units
• 28 amp, 120V rating
• Includes relay and transformer
• Includes two 18 amp mini breakers
• Includes two pairs of low voltage leads
• Threaded reset button and low voltage stems mount through the vacuum exterior
• External mounting nuts are included

Product Details

• Part Number: M.D. #235L
• Voltage: 120V
• Amperage: 28 amp
• Motor Compatibility: Select 1 or 2 motor units
• Board Height: Approximately 2" from board to top of reset button
• Mini Breakers: Two 18 amp reset buttons

Safety & Installation Warning

This circuit board connects to high-voltage electrical components inside the central vacuum unit. Always unplug the vacuum power unit from the electrical outlet before inspecting, troubleshooting, removing, or installing any circuit board or electrical part.

Before replacing the board, make sure the issue has been properly diagnosed. A failed motor, wiring problem, bad relay, clogged system, or other electrical issue may cause similar symptoms.

If you are not comfortable working with electrical components or are unsure how to properly troubleshoot the unit, we strongly recommend having this part installed by a qualified professional.

Installation Notes

The reset button and low voltage stems are threaded and designed to attach through openings in the vacuum unit’s exterior. External mounting nuts for these components are included.

For wiring placement, click on the product photo and print it to use as a visual reference before removing the old board. Always compare wire placement and board configuration before installation.

Important Compatibility Notice

This circuit board does not work on all vacuum systems. Please compare your original board, mounting style, reset button placement, low voltage stem locations, voltage, amperage, and motor configuration before ordering.

Please note: Quarter-inch female spade terminals are not included.