Display shows H1 and the ice maker stops or runs with very low ice output.

Safety first: Do not operate the ice maker in environments outside the manufacturer’s specified temperature range.

Steps to resolve:

• Measure room temperature: Use a thermometer to confirm ambient temperature. Haier ice makers typically require 10–38°C (50–100°F).
• Improve ventilation: Ensure there is adequate clearance around the sides, back, and top of the unit as specified in the user manual. Move the unit away from walls if necessary.
• Avoid heat sources: Relocate the ice maker away from ovens, dishwashers, direct sunlight, or heating vents.
• Clean air passages: Check and clean any intake or exhaust grilles to ensure unobstructed airflow.
• Allow cool-down: Turn the unit off for 30–60 minutes in a cooler environment, then restart and monitor for H1 recurrence.

When to call a technician: If H1 appears even in a cool, well-ventilated room, the ambient sensor or control board may be faulty and should be checked by a professional.