Unit stops and displays H3; may occur during heavy load in cooling or heating.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Blocked outdoor coil, Failed outdoor fan motor, High ambient temperature with poor ventilation, Internal compressor mechanical fault

Safety first: Turn off power and allow the unit to cool for at least 30 minutes.

Steps to try:

Clean outdoor coil and area: Remove debris and ensure good airflow.
Check fan operation: After cool-down, restore power and verify the outdoor fan starts with the compressor.
Reduce load: Avoid setting the thermostat to extreme temperatures; use moderate setpoints.

When to call a technician: Repeated H3 trips indicate a serious compressor or system issue that requires professional diagnosis.

Hard 4/5

Outdoor Fan Motor

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