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Ice machines · Brand-specific · 9 min read

Hoshizaki ice machine error codes, explained

E1, E2, E3, E4, E5, and beyond — what each code means on Hoshizaki KM, KML, and IM series ice machines.

Section 01

E1 — high evaporator temperature

Typically a low refrigerant charge, inadequate condenser airflow, or a failed thermistor. Start by verifying condenser cleanliness and fan operation.

Section 02

E2 — long harvest cycle

The ice harvest is taking longer than the control expects. Usually a hot water supply solenoid issue, defrost valve failure, or low refrigerant.

Section 03

E3 — sensor failure

The control is reading an implausible value from one of the sensors. Check suction and discharge thermistors first.

Section 04

E4 — high condenser temperature

Dirty condenser coil, failed fan, or ambient temp exceeding spec. Clean the coil monthly in Tampa Bay kitchens.

Section 05

E5 — flush operation error

The machine could not complete its automatic flush cycle. Water inlet issue or drain blockage.

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