Ariston
Overheating Electrical Component
Burning or electrical smell from indoor or outdoor unit.
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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
Burnt PCB component, Overheating fan motor, Loose electrical connection causing arcing, Melted insulation on wiring
How to Fix / Troubleshooting
Safety first: Immediately turn off the air conditioner at the breaker if you smell burning. Do not continue to operate the unit.
- Step 1 – Visual inspection: After the unit cools, remove covers and inspect PCBs, wiring, and motors for burn marks or melted plastic.
- Step 2 – Check connections: Tighten any slightly loose terminal screws at indoor and outdoor terminal blocks.
- Step 3 – Do not bypass safety devices: If a component appears burnt (e.g., capacitor, resistor, connector), it must be replaced, not bypassed.
- Step 4 – Call a technician: Because fire risk is involved, have a qualified technician diagnose and replace any burnt components, such as the Ariston indoor or outdoor PCB, fan motor, or wiring harness.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Main Control Board (PCB)
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