The GE Magnet Monitor 3 (MM3) is a third-generation, computer-based module designed to interface with various types of cryogenic magnets in GE Magnetic Resonance Imaging (MRI) systems. Identified by part number 2394952-2, this Field Replaceable Unit (FRU) is crucial for the continuous monitoring and diagnostics of the magnet’s health, particularly its cryogenic status. It features a Single Board Computer (SBC) for controlling all monitoring functions, a user interface with a display and touchpad for local diagnostics, and LEDs for status indication (Green for power, Yellow for helium heater, and Red for alarm). This assembly is backward compatible and provides flexible connectivity options. It is essential for ensuring the reliable and safe operation of the MRI system.