Indoor unit displays H1 and heating does not start immediately; indoor fan may stop.

Note: H1 on many Hisense heat pump models is an informational code indicating defrost or heating delay, not a fault.

• Step 1 – Wait for defrost to complete:
  • Allow 5–15 minutes for the outdoor unit to complete defrost.
  • The indoor fan may stop to avoid blowing cold air.
• Step 2 – Check outdoor unit:
  • Ensure the outdoor coil is not buried in snow or ice.
  • Clear snow from around the unit to improve airflow.
• Step 3 – Monitor frequency:
  • If H1 appears very frequently and heating is poor, a technician should check defrost sensor operation and refrigerant charge.