Magnet Disc Assembly 100238193 (54520KIT)

Part Description:

The Magnet Disk is a small but vital component installed on the cam gear of WaterBoss, AquaMaster, and AquaMaster PRO water softeners. It works with the internal sensor to track cam rotation and position, allowing the control board to monitor and control the softener’s regeneration cycle.

Function & Importance:

• The magnet rotates with the cam and signals the control board when the system reaches specific positions in the cycle

• Helps the softener start, stop, and complete regeneration steps at the right time

• The magnet triggers the sensor as it passes, allowing the system to "know" where it is in the cycle

• Without it, the softener cannot complete its service or regeneration steps correctly

Common Signs of Issues:

• System stuck in a cycle

• Control panel displays error or doesn't advance

• Incomplete regeneration or hard water

Compatible Models:

• WaterBoss 700, 900, and 950

• AquaMaster 700, 900, and 950

• AquaMaster PRO 5000, 5100, and 5500

Installation Tips:

• The disk must be securely attached to the designated spot on the cam gear

• Ensure the magnetic surface aligns with the internal reed switch

• The magnet can chip or crack—handle with care

• Make sure the controller is attached as it needs to “talk” with it

Why It Matters:

Though small, the Magnet Disk is essential to the softener’s timing and operation. If it isn’t working, the system can’t accurately track or complete its regeneration cycles—leading to hard water, wasted salt, or system errors. A properly installed magnet ensures your softener runs smoothly and efficiently, protecting your appliances and water quality. Please call technical support first to ensure this is the correct part for the issue your softener may be experiencing 1-800-437-8993 (EST).