During winter heating operation, you should set your ductless mini-split indoor unit fan mode to "Auto" rather than running it on a fixed manual high or low speed. Setting the fan to Auto allows the mini-split's internal computer logic and inverter system to regulate fan speed dynamically based on the actual coil temperature and room heating demand. When the system first starts heating, the fan remains off or runs slowly until the indoor coil warms up, preventing cold drafts from blowing across the room; once heated, the fan adjusts smoothly to distribute warmth efficiently. You can troubleshoot comfort levels easily. You can verify that the Auto fan setting is optimal when the system delivers consistent, comfortable warm air without creating chilly drafts or wasting electrical energy during heating cycles.
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