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The car cabin remains warm even in severe cold weather.

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The car cabin remains warm even in severe cold weather. It's a Model X 90D from 2016. Has anyone else experienced this phenomenon? The car is parked outside in relatively cold weather, around 20°F. The battery is also cold, showing a blue snowflake. However, the cabin temperature is at 40°F, despite wind speeds reaching 10 miles per hour. Camp and dog modes are both turned off. Initially, I thought the cabin warmed during sunny days, but my screenshot was taken in the evening, five hours after sunset, with the car in the shade and wind. I dismiss the sunlight theory. I'd appreciate insights if anyone has faced a similar situation and knows the answer. Note that the internal temperature sensor functions correctly; when the heating is set to 70°F, the sensor reads approximately same temperature +-2°F.screenshots made in different time of the day and shows approx same temperature inside. Car losing 3% battery charge per 24 hours (usual loss for my car 1-2%).
 

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