Unit powers on but compressor never starts; only the fan runs and air is not cold.

Safety warning: High voltage and stored energy in capacitors can be dangerous. Unplug the unit and discharge capacitors properly before touching.

Steps:

• Verify mode and setpoint: Ensure the unit is in COOL mode and the set temperature is lower than room temperature.
• Listen for compressor: A brief hum followed by a click may indicate a start problem.
• Check line voltage: Use a multimeter to confirm correct voltage at the outlet under load. Low voltage can prevent compressor start.
• Inspect start capacitor: Access the compressor compartment, locate the capacitor, and inspect for bulging or leaks. Replace with the correct Hotpoint compressor capacitor if suspect.
• Compressor test (advanced): With wires removed and power off, measure compressor winding resistances. Infinite or zero readings indicate a failed compressor, requiring professional replacement.

Call a technician: If a new capacitor does not resolve the issue, the compressor or control board likely needs professional diagnosis.