Thermistor
Common temperature-sensing fault part. Confirm resistance range and connector.
Hoshizaki KM-330 Error Codes — What They Mean
The Hoshizaki KM-330 produces approximately 330 lbs of crescent ice per day and is commonly installed in restaurants and small hotel operations. It uses the same error code system as all Hoshizaki KM-series machines.
| Code | Meaning | Urgency |
|---|---|---|
| E1 | Ice making cycle too long | Medium |
| E2 | Harvest cycle too long | High |
| E3 | Harvest assist fault | High |
| E5 | High evaporator temperature | Medium |
| E9 | Compressor/refrigeration fault | High |
| F1 | Drain pump fault | Medium |
| F2 | Ice full sensor fault | Low |
KM-330 Fixes
E1 (ice making too long): Clean condenser coil with fin brush. Verify ambient is below 100°F and incoming water is below 90°F. The KM-330 in a hot kitchen walks into E1 territory fast without regular condenser cleaning.
E2 (harvest too long): Check the hot gas bypass valve — suction line should warm up during harvest. If it stays cold, the valve coil has failed. Test coil resistance (typically 10-30Ω).
E9 (refrigeration fault): Check condenser and fan first. If clean, check refrigerant pressures against the KM-330 PT chart.
F2 (ice full sensor): KM-330’s ice bin sensor is in the storage bin below the machine. Check for ice bridging over the sensor. Clean and verify.
Parts Often Needed
| Part | Notes |
|---|---|
| Hot gas bypass valve | Most common E2 fix |
| Hoshizaki Scale Away cleaner | Descale quarterly |
| Ice full sensor | For F2 if sensor fails |
Technician Tips
When diagnosing commercial refrigeration faults, start with the controller’s alarm history. Most digital controllers (Dixell, Carel, Eliwell) store the last 5-10 alarms with timestamps. An E1 alarm that appears consistently every few hours suggests a sensor going bad — the resistance value drifts until it’s out of range. An intermittent HI/LO alarm that appears only during hot afternoons suggests a condenser issue, not a sensor fault.
Prevention: Schedule quarterly condenser coil cleaning. Dirty coils are the #1 cause of high-head-pressure faults and compressor overheating in commercial refrigeration. Use a soft brush and compressed air — never a pressure washer on the coil fins.
Need Replacement Parts?
Before ordering, match the ice-machine part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
When to Call a Pro
E9 refrigerant-side faults require EPA 608 certified technician.