Hoshizaki Flaker 10 Beeps: Evaporator Thermistor
Ten beeps on a Hoshizaki F-1501M or F-2001M J cubelet model means the evaporator thermistor reached -22F (-30C) for 3 consecutive cycles. Turn power off and call for service. Keep the icemaker off until the cause has been resolved, to avoid possible catastrophic failure.
High: the manual says to turn power off and leave the machine off until the cause is resolved.
- Code
- 10 beeps
- Maker
- Hoshizaki
- Equipment
- Ice machines
- Applies to
- F-1501M/F-2001M J cubelet (-C)(-SC)(-CB) models
What does Hoshizaki error code 10 beeps mean?
This alarm is used only on cubelet models with -C, -SC and -CB in the model name. The evaporator thermistor measures the evaporator's temperature, and during normal operation it stays above a certain cold limit. If it reaches -22F (-30C) for 3 consecutive cycles, the control stops the machine and sounds ten beeps. A reading that cold suggests the evaporator is being over-chilled, which can come from an auger or drive problem, a refrigerant flow problem, or a thermistor that reads wrong. The alarm is a manual reset by cycling power, but the manual's instruction is clear: turn power off, call for service, and leave the icemaker off until the cause is resolved, to avoid possible catastrophic failure. Restarting to see whether it goes away only repeats the condition that caused it.
Affected models and control systems
F-1501M and F-2001M J cubelet models with -C, -SC and -CB in the name; this alarm is not used on other flaker models.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Ten beeps
- Machine stopped
- Evaporator extremely cold
- Little or no ice
Possible causes
Likely causes — what usually sits behind error code 10 beeps on this control. A technician confirms which one it is before any part is replaced.
- Evaporator thermistor reached -22F (-30C) for 3 consecutive cycles
- A thermistor that reads colder than the real evaporator
- Refrigerant flow that over-chills the evaporator
- A drive or auger problem that changes how the evaporator behaves
Safe checks before calling for service
- Turn the power off at the machine and leave it off.
- Do not restart it to test whether the alarm returns.
- Keep the area around the machine clear.
- Write down the model, the beep count and when it started, and call service.
How a technician diagnoses error code 10 beeps
- Confirm the 10-beep alarm and the cubelet model.
- Read the evaporator thermistor value against the true temperature.
- Check the thermistor and its wiring.
- Check refrigerant flow and charge with gauges.
- Check the drive and auger before restarting the machine.
- Evaporator and refrigerant checks are done with gauges on the sealed system.
- Running the machine against this alarm risks catastrophic failure, as the manual warns.
- The thermistor and drive tests involve live circuits.
How error code 10 beeps differs from similar codes
10 beeps applies only to cubelet models, unlike 8 beeps, whose gear motor case applies to all models.
Technical reference
- Document
- Instruction Manual, Modular Flaker F-1501MAJ/MWJ/MRJZ, F-2001MWJ/MRJZ/MLJ (J control board; table also names DCM and cubelet models)
- Maker documentation
- Hoshizaki owner support
- Edition
- Issued 11-15-2021, revised 8-18-2023
- Models / control
- F-1501M/F-2001M J cubelet (-C)(-SC)(-CB) models
- Section
- L. Alarm Safeties, p. 40
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Hoshizaki ice machine error codes
Why is the manual so strict about leaving the machine off?
The machine is over-chilling the evaporator, and continuing to run could damage it.
Is 10 beeps on every flaker?
No. It is used on cubelet (-C)(-SC)(-CB) models only.
Can I power cycle it?
The reset is by cycling power, but the manual says to leave the machine off until the cause is resolved.
Need help with Hoshizaki error code 10 beeps?
A technician confirms the cause on site and gives you the price in writing before any work starts.