The answer to 'why is my mini split short cycling' is that short cycling, where the HVAC system turns on and off rapidly, is often caused by issues with the system's components or settings. Common causes include a dirty air filter, refrigerant leaks, issues with the compressor, or problems with the thermostat or control board.
Short cycling can lead to increased wear and tear on the system, higher energy bills, and reduced comfort in your home. It's important to diagnose and address the root cause to fix the issue. Some simple DIY troubleshooting steps like checking the air filter may resolve the problem, but more complex issues will likely require a professional HVAC technician to diagnose and repair.