The answer to 'why is my mini split' is that there could be several common causes for issues with a mini split system, including low refrigerant levels, a blocked or dirty air filter, a malfunctioning compressor, or issues with the electrical components. Symptoms may include the unit not cooling effectively, strange noises, or the system not turning on at all.
In many cases, simple maintenance tasks like cleaning the air filter or checking the refrigerant level can resolve minor problems. However, more complex issues like a compressor failure or electrical faults will likely require a professional HVAC technician to diagnose and repair. It's generally not recommended for homeowners to attempt DIY repairs on the refrigerant or electrical systems, as improper handling can be dangerous.