E03
Toshiba
Indoor Fan Motor Lock / Overload
Indoor unit stops shortly after starting; E03 appears on the display.
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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 fan wheel, Failed indoor DC fan motor, Faulty fan motor hall sensor, Defective indoor fan driver circuit on PCB
How to Fix / Troubleshooting
Safety first: Turn off the breaker and wait for the indoor fan to stop completely before opening the unit.
- Step 1 – Remove filters and front panel: Open the front cover, remove air filters, and visually inspect the cross-flow fan (drum) for dust buildup or foreign objects.
- Step 2 – Clean and free the fan: Remove any debris (plastic bags, insulation, insects). Rotate the fan by hand; it should spin freely without scraping. If stiff, the motor bearings may be failing.
- Step 3 – Deep clean: Use a soft brush and vacuum to remove heavy dust from the fan wheel and coil. Excess dust can overload the motor.
- Step 4 – Check motor wiring: Remove the electrical cover and verify the indoor fan motor connector is fully seated on the indoor PCB. Look for burnt pins.
- Step 5 – Test run: Restore power and run in fan-only mode. If the fan does not start or E03 returns, the DC fan motor assembly or PCB driver is likely defective and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Fan Motor Assembly
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