P1
AEG
Indoor/Outdoor Voltage or Current Mismatch (Model-dependent)
P1 error; unit may not start or may shut down under heavy load.
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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
Incorrect supply voltage, Loose neutral or earth, Overloaded circuit, Faulty current sensor on PCB
How to Fix / Troubleshooting
Safety: Electrical measurements should be done by a qualified person.
- Verify circuit rating: Confirm the air conditioner is on a dedicated circuit with the correct breaker size as per AEG installation instructions.
- Check plug and socket (portable units): Ensure the plug is fully inserted and not overheating. Do not use multi-way adapters.
- Inspect wiring: With power off, check for loose or burnt terminals at the indoor and outdoor connection blocks.
- If P1 persists: Have an electrician or AEG technician measure supply voltage under load and test the PCB current sensor.
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Repair Difficulty
Hard
4/5
Required Part
Current/Voltage Sensor on PCB
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