How do you fix a Nissan 300zx blows hot air with ac on?

If your Nissan 300ZX is blowing hot air with the AC on, first check the AC refrigerant levels; low refrigerant can prevent the system from cooling properly. Inspect the AC compressor to ensure it's engaging when the AC is turned on, as a malfunctioning compressor can lead to insufficient cooling. Additionally, check for any blocked or damaged condenser and ensure the AC system's electrical components are functioning correctly. If these steps don't resolve the issue, it may be best to consult a professional mechanic for a more thorough diagnosis.