H2
Sharp
Indoor Unit Overheat / Heat Exchanger Protection
Unit stops heating or cooling; H2 appears intermittently.
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Safety Warning
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.
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Possible Causes
Blocked indoor air filters, Dirty indoor coil, Indoor fan malfunction, Incorrect installation with restricted air circulation
How to Fix / Troubleshooting
Safety first: Turn off the unit and breaker before cleaning or opening panels.
- Clean filters and coil: Wash filters and gently clean the indoor coil. Ensure no plastic covers or decorative panels restrict airflow.
- Check fan speed: Run the unit and verify that fan speeds change correctly. If the fan is weak or stops, inspect and replace the indoor fan motor if needed.
- Room layout: Avoid placing large furniture directly in front of the indoor unit. Maintain clear airflow.
- Sensor check: Confirm the indoor coil thermistor is correctly positioned. Replace if it appears damaged.
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Repair Difficulty
Medium
3/5
Required Part
Indoor DC Fan Motor
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