Haier Overheating Electrical Component / Insulation Failure

Burning or electrical smell from indoor or outdoor unit during operation.

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

Loose electrical connections causing arcing, Overheated fan or compressor motor, Failing PCB components, Foreign object contacting heating parts

Safety first: Immediately turn off the unit and switch off the breaker. Do not continue operating until inspected.

Visual inspection: After cooling, open the indoor and outdoor electrical covers and look for burnt wires, melted insulation, or scorched PCB areas.
Tighten terminals: Tighten any loose terminal screws on power and motor connections.
Do not ignore: If any component appears burnt or smell persists, do not use the unit. Contact a qualified technician to replace damaged parts.

Hard 4/5

Indoor Main Control PCB

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