Unit turns on but compressor does not start; only the fan runs and no cooling occurs.

Safety: Unplug the unit. Capacitors can store dangerous charge; discharge them properly or have a technician handle testing.

Steps:

• 1. Listen for compressor: When cooling is selected, you should hear a distinct hum or click from the compressor. If you only hear the fan, suspect a start issue.
• 2. Check voltage: Ensure the unit is plugged directly into a dedicated outlet with correct voltage. Avoid extension cords.
• 3. Inspect capacitor: Access the electrical compartment and locate the dual run capacitor (often shared by fan and compressor). Look for bulging, leaking, or rust. Replace with an identical µF rating and voltage if suspect.
• 4. Relay/board: On electronic models, the compressor is switched by a relay on the main board. If the relay is burnt or not energizing, the board may need replacement.
• 5. Compressor test: If capacitor and relay are good but the compressor will not start or trips breakers, the compressor may be locked and require professional evaluation.