Mercedes-Benz CLK350 A/C blows hot air on driver side and cool air on passenger side on Mercedes-Benz CLK350

Some Mercedes-Benz CLK350 owners report experiencing a temperature imbalance in their A/C system, with hot air on the driver side and cool air on the passenger side. This issue may be attributed to a malfunctioning actuator motor for the left blend air flap, as indicated by fault code 90A207, which can create mechanical faults leading to temperature disparities. Additionally, low refrigerant levels in the A/C system have been noted as a contributing factor, resulting in inconsistent cooling between the two sides. Problems with the heater core or heater duovalve may also cause one side to blow hot air while the other remains cool. To resolve these issues, owners are advised to check refrigerant levels, inspect the actuator motor for malfunctions, monitor temperature discrepancies using a digital thermometer, and seek professional assistance if the problem persists.