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. Some common causes include low refrigerant levels, a dirty air filter, a malfunctioning thermostat, or problems with the compressor or other parts.
Short cycling can lead to increased energy usage, reduced comfort, and potential damage to the HVAC system over time. It's important to address the underlying issue to restore normal operation and prevent further problems.