Setting your Ecobee thermostat to Auto or Cool depends entirely on the season and your personal comfort preferences. During hot summer months, setting the mode to Cool ensures the air conditioner runs whenever indoor temperatures exceed your target setpoint without accidentally kicking on the heat. During transitional spring or autumn days when outdoor temperatures fluctuate wildly between chilly mornings and warm afternoons, setting the mode to Auto allows the Ecobee to seamlessly switch between heating and cooling to maintain a stable indoor temperature. Verification: Check your local weather forecast and select the operating mode that prevents unwanted HVAC cycling.
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