Unit operates but occasionally emits a burning or hot plastic smell.

Safety first: If you smell strong burning or see smoke, unplug the unit immediately and do not use it until inspected.

• New unit: A mild odor may be normal for the first few hours of operation. Ensure good ventilation and monitor closely.
• Inspect wiring: With the unit unplugged, remove panels and look for discolored wires, melted insulation, or burnt connectors. Repair or replace any damaged wiring.
• Check motors and compressor: Smell near the fan motor and compressor. If one component has a strong burnt odor, it may be failing and should be replaced.
• Clean dust: Remove dust from hot components to prevent scorching smells.
• Do not ignore: Persistent burning smells indicate a safety issue; discontinue use and seek professional service.