The answer to 'mini split not cooling' is that there are several common causes, including low refrigerant levels, a blocked or dirty air filter, a malfunctioning compressor, or a problem with the thermostat or electrical components. Symptoms may include warm air coming from the indoor unit, the compressor not running, or the unit cycling on and off frequently.
In many cases, the solution may involve a simple DIY fix like cleaning the air filter or checking the thermostat settings. However, more complex issues like refrigerant leaks or compressor problems will likely require a professional HVAC technician to diagnose and repair. It's generally best to call in a pro if you're unsure of the cause or don't feel comfortable troubleshooting the issue yourself.