Display shows H1; unit continues to run but with reduced performance

Safety First: Disconnect power before cleaning condenser or moving the unit.

• Check room temperature: Measure ambient temperature around the ice maker. Compare to Hoshizaki’s maximum ambient rating (often around 100°F/38°C). If exceeded, improve room cooling or relocate the unit.
• Improve ventilation: Ensure required clearances on sides, back, and top. Remove any items blocking air inlets or outlets.
• Clean condenser: Thoroughly clean the condenser coil to improve heat rejection.
• Reduce nearby heat sources: If the unit is next to hot equipment, add heat shields or increase separation.

When to call a technician: If H1 persists in a properly cooled and ventilated space, the temperature sensing or control logic may need evaluation.