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What is the reason for the Mercedes-Benz C200L air conditioner being cold on one side and hot on the other?

2 Answers

LeLeah

07/29/25 8:55am

The reason for the Mercedes-Benz C200L air conditioner being cold on one side and hot on the other: The air conditioner of the Mercedes-Benz C-Class is a dual-zone control air conditioner, which means the temperature on both sides can be set independently. If it is set separately, the air conditioner will be half cold and half hot, which is a normal phenomenon; if it is not set, then there is a problem with the air conditioning system, such as a blocked warm water valve, damaged compressor, or insufficient refrigerant. The length, width, and height of the Mercedes-Benz C200L body are 4784mm, 1810mm, and 1457mm respectively, with a wheelbase of 2920mm. The car is equipped with a 1.5T turbocharged engine, matched with a 9-speed automatic manual transmission. The maximum power of this engine is 115kW, and the maximum torque is 250Nm.

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MacMiranda

08/12/25 7:30am

I also encountered the issue of one side of the air conditioning being cold while the other side is hot in my Mercedes-Benz. A common cause is a malfunction in the temperature control system. For example, the blend door might be stuck or the position sensor could be faulty—these components are responsible for regulating the airflow temperature. Dual-zone air conditioning systems, which control left and right sides independently, are prone to such failures. Last time, my car had this problem due to a rusted blend door linkage, causing one side to be warmer while the other remained cool. Initially, I tried adjusting the temperature buttons back and forth to see if there was any response. If that doesn’t work, you’ll need to dismantle the center console for inspection. Additionally, refrigerant leaks or control module programming errors can also cause similar issues. Delaying repairs can affect comfort and safe driving, so it’s advisable to visit a professional shop for diagnosis and repair as soon as possible—don’t wait until summer when the AC becomes unusable and the problem worsens. By the way, regular maintenance of the air conditioning system can help prevent such issues.

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