The answer to 'why is my mini split' is that there could be several common causes, including refrigerant leaks, compressor issues, electrical problems, or a clogged air filter. Symptoms may include the unit not cooling effectively, making strange noises, or not turning on at all. Solutions can range from simple DIY fixes like cleaning the filter to more complex repairs that require a professional HVAC technician.
If the issue is a refrigerant leak, you may notice the unit not cooling as well as it should. This could be due to a small leak in the refrigerant lines. Smaller leaks may be something a homeowner can try to repair, but larger leaks will likely require a professional to properly diagnose and fix the issue. Compressor problems or electrical faults are generally more complex and are best handled by a licensed HVAC technician.