Why is one side of the Mercedes-Benz R350 air conditioning cold while the other side is hot?

1 Answers
GrahamLynn
07/30/25 1:18am
Introduction to the reasons why one side of the Mercedes-Benz R350 air conditioning is cold while the other side is hot 1. Insufficient refrigerant: When the refrigerant is insufficient, the evaporation and heat absorption process of the liquid refrigerant entering the evaporator ends quickly, causing the evaporator to absorb heat and cool down only when the refrigerant flows in, while there is no heat absorption effect when the refrigerant flows out. At this time, only a small part of the airflow sent by the blower is cooled, resulting in a temperature difference between the air outlets on both sides. By measuring the pressure of the high and low pressure pipelines of the air conditioning system, it can be determined whether the refrigerant is insufficient. Replenishing the refrigerant can solve the problem. 2. Low efficiency of the air conditioning compressor: The air conditioning compressor operates at low efficiency due to a malfunction, resulting in insufficient liquefaction of the refrigerant. When the refrigerant in this state enters the evaporator, the effect of evaporation and heat absorption will also be severely insufficient, leading to poor cooling performance, which is ultimately reflected in the temperature of the airflow at the air outlet not meeting the standard. 3. Dirty condenser and evaporator: If the condenser and evaporator are not cleaned for a long time, they will be covered with dust and lint, weakening the effect of the refrigerant or reducing the heat absorption efficiency when the refrigerant changes state. This prevents the air from being fully cooled, ultimately causing temperature differences in the airflow output from each air outlet.
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