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Kia grand carnival aircond no cold, change compressor, filter and Flushing aircond.
If your Kia Grand Carnival's air conditioning is still not cold after changing the compressor and filter, and flushing the system, the problem may be due to other faulty components or a procedural error during the repair process. The most common issues after such extensive work involve electrical problems, restricted airflow, or issues with refrigerant levels and circulation.
Potential Issues
Incorrect Refrigerant Charge/Leaks: Even after flushing, the system might have an improper amount of refrigerant (either too little or too much) or an undetected slow leak. A professional needs to verify the charge and perform a thorough leak detection test.
Air in the System: If the system was not properly vacuumed before recharging with refrigerant, trapped air can hinder cooling efficiency.
Condenser or Evaporator Issues: The condenser (located in front of the radiator) or the evaporator coil (inside the cabin) could be blocked with dirt and debris, preventing proper heat exchange even if a new compressor is installed. The flushing might not have fully cleared internal blockages.
Malfunctioning Cooling Fans: The electric cooling fans for the condenser need to work correctly for the AC system to dissipate heat effectively. If they are not running at the right speed or not at all, the system's pressure will get too high, and cooling will be inhibited, especially when the car is stationary.
Electrical Problems: Issues with fuses, relays, or the AC control module can prevent the compressor clutch from engaging properly or the system from receiving the correct signals to cool. A faulty capacitor can also be the cause of no cold air in some cases.
Thermostat or Blend Door Malfunction: A malfunctioning thermostat might not be sending the correct temperature readings, or a stuck "blend air door" might be preventing cold air from circulating into the cabin.
Internal Hose Blockage: In some cases, the inner layer of an AC hose can collapse internally, blocking the flow of refrigerant, even if the exterior looks fine. This would require inspection and replacement of the specific hose.