The Hoshizaki 4A6838-01 Ultrasonic Bin Control Board (also known as M0032771) is the genuine OEM replacement board responsible for monitoring ice bin levels in Hoshizaki ice machines. This ultrasonic control system ensures accurate ice level detection?preventing overproduction, reducing wear on components, and maintaining optimal ice storage performance. If your unit is overfilling, not shutting off, or displaying bin-sensing errors, this board is the correct replacement. Key Features Genuine Hoshizaki OEM ultrasonic bin control board Provides precise, non-contact bin level sensing Prevents overfilling and ensures proper machine shutdown Reliable solid-state design for long service life Direct-fit replacement part with factory compatibility Specifications Part Numbers: 4A6838-01, M0032771 Type: Ultrasonic Bin Control Board Function: Ice bin level detection production control Application: Hoshizaki crescent-cube ice machines Compatible Models (Shortened List) Fits 10 Hoshizaki models, including: KM-350MAJ KM-350MWJ KM-520MAJ KM-520MAJ-E KM-520MRJ KM-520MWJ KM-660MAJ KM-660MAJ-E KM-660MRJ KM-660MWJ Why Choose This Item This OEM ultrasonic bin control board restores proper ice level monitoring and protects your machine from overproduction. Choosing the genuine Hoshizaki board ensures accuracy, reliability, and correct operation?critical for long-term performance.