Unit powers on but compressor never starts; only the fan runs and no cooling occurs.

Safety: Unplug the unit. Compressor circuits carry high voltage and can store charge.

• Listen for compressor: When COOL mode is selected, listen for a low humming sound from the compressor compartment. If there is no sound at all, the compressor may not be receiving power.
• Check for clicking: Repeated clicking without compressor start can indicate a bad start device or locked compressor.
• Inspect start components (advanced): Access the compressor terminal cover and inspect the start relay/PTC and capacitor. Look for burn marks or bulging capacitors.
• Replace start device/capacitor: If visibly damaged, replace with the exact Black+Decker-specified parts. Incorrect values can damage the compressor.
• Professional diagnosis: If the compressor still does not start, the compressor windings or control board may be faulty. This requires a qualified technician with proper test equipment.