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What Causes One Side of the Car Air Conditioner to Be Hot and the Other Cold?

2 Answers
VonCarmen
08/27/25 4:33am
Possible reasons for one side of the car air conditioner being hot and the other cold include incorrect settings, misadjusted temperature buttons, abnormal refrigerant levels, or a blocked heater valve. Below is detailed information about car air conditioners: 1. Overview: The car air conditioning device (air-conditioning-device), commonly referred to as car air conditioning, is used to adjust and control the temperature, humidity, air cleanliness, and airflow within the car cabin to optimal conditions. 2. Function: It provides a comfortable environment for the driver, reducing travel fatigue, and creates favorable working conditions to ensure driving safety. The car air conditioning system typically includes a cooling device, heating device, and ventilation device.
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McLane
09/09/25 3:36am
I just started driving and encountered the issue where one side of the AC blows hot air while the other blows cold, which is quite annoying. The possible reasons could be a stuck air mix door, which is located behind the dashboard and controls the mixture of hot and cold air. If it gets stuck in the middle position, it can cause one side to be hot and the other cold. Another possibility is a faulty temperature sensor, which misreads the cabin temperature and causes command confusion. Additionally, blocked air ducts due to dust accumulation can obstruct airflow, allowing only warm air to pass through certain areas. I suggest first checking if there are any settings issues, such as the dual-zone AC being set to different temperatures. If that doesn’t help, check if any fuses are blown, and then seek professional repair to avoid compromising driving comfort.
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