Kelvinator split AC shows H1 during heating mode and outdoor unit may defrost frequently.

Note: On many Kelvinator heat pump models, H1 is an informational code indicating defrost mode, not a fault.

User checks:

• Observe behavior: During H1, outdoor fan may stop and indoor unit may blow cooler air. This is normal for a few minutes.
• Check outdoor coil: If the outdoor coil is heavily iced and H1 persists for very long periods, ensure the coil is clean and airflow is not blocked.
• Clean coil: Gently remove debris and use warm (not hot) water to melt excessive ice if necessary. Do not chip ice with sharp tools.

Sensor/PCB issues: If H1 appears constantly and heating is poor, the outdoor coil sensor or defrost control on the PCB may be faulty and require technician service.