What does EE (log code E9) mean on a Hoshizaki IM-series square cuber?
Short answer: Condenser thermistor error. If your Hoshizaki IM-series square cuber (models with condenser thermistor) is showing EE (log code E9), the controller has logged a specific, documented condition. This page covers what it means, what causes it, what you can safely fix yourself, and when — and why — it takes a technician.
What exactly is the machine telling you?
The condenser thermistor circuit read open or shorted for 2 seconds and the unit stopped. Hoshizaki's remedy is thermistor replacement. (Not applicable on IM-500SAA, which has no condenser thermistor; documented for IM models that do.)
Which machines show this?
this fault applies to IM-series square cubers equipped with a condenser thermistor — not every IM model has one (the IM-500SAA, for example, does not), so this code appears only on the models whose refrigeration monitoring includes condenser temperature. Like other IM faults beyond E1/E2, it displays as a generic EE on the 7-segment display with the true code stored in the error log. If a technician quotes you this diagnosis, it's a sensor replacement — one of the more contained repairs on these machines.
What causes it?
- The condenser thermistor circuit reading open or shorted for 2+ seconds
- A damaged sensor lead
- A failed thermistor
Can you fix it yourself?
One power-cycle. Note that this code only exists on IM models equipped with a condenser thermistor — if a tech quotes it for a model without one, ask questions.
Step by step — what to try, in order:
- Power-cycle once to see if the reading was transient
When do you need a technician — and why?
Sensor replacement in the refrigeration section, verified with a resistance test — small, precise, and behind the panel.
If it does come to a service call and you're in Nashville, TN or Birmingham, AL, we maintain independently compiled lists of local companies that service commercial ice machines — real businesses with verified contact information, none of whom paid to be listed.
Related questions
What does EE (log code E9) mean on a Hoshizaki IM-series square cuber (models with condenser thermistor)?
Condenser thermistor error. The condenser thermistor circuit read open or shorted for 2 seconds and the unit stopped. Hoshizaki's remedy is thermistor replacement. (Not applicable on IM-500SAA, which has no condenser thermistor; documented for IM models that do.)
Can I fix EE (log code E9) on a Hoshizaki IM-series square cuber (models with condenser thermistor) myself?
One power-cycle. Note that this code only exists on IM models equipped with a condenser thermistor — if a tech quotes it for a model without one, ask questions.
When does EE (log code E9) on a Hoshizaki IM-series square cuber (models with condenser thermistor) need a technician?
Sensor replacement in the refrigeration section, verified with a resistance test — small, precise, and behind the panel. A persistent E9 means the condenser thermistor must be replaced by a technician.