What Causes the Inability to Add Refrigerant to a Car?

2 Answers
RosalieLynn
07/25/25 6:15am
This issue primarily occurs when the car's air conditioning compressor is not functioning or when the internal pressure in the pipeline is too high, preventing the refrigerant from being added. In such cases, it is necessary to visit a 4S shop for inspection. Once the specific fault location is identified and repaired, the problem can be resolved. Below is additional information: 1. Car Air Conditioning: Car air conditioning refers to the air conditioning device installed in a vehicle, which can cool, heat, ventilate, and purify the air inside the cabin. It provides a comfortable environment for passengers, reduces driver fatigue, and enhances driving safety. The air conditioning system has become one of the indicators of a car's comprehensive functionality. 2. Precautions: It is important to note that the car must be started and the air conditioning turned on before adding refrigerant. Refrigerant is typically added from the low-pressure side, and the high-pressure end of the refrigerant gauge should be tightened. Usually, a car only requires about 4 cans of refrigerant, and once it is fully charged, no more can be added.
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JordanLee
08/10/25 6:04pm
I found that the refrigerant can't be charged, most likely due to a system leak. Loose or cracked pipe connections can cause insufficient pressure. The compressor not working is also a common issue - if the engine is running but the AC pump isn't responding, refrigerant won't get charged. A clogged expansion valve can block refrigerant flow, requiring professional tools for inspection. Many DIYers overlook improper vacuuming where air occupies space, preventing refrigerant entry. I've seen owners force charging, only to damage the condenser with more expensive repairs. Recommend first checking for leaks, testing system integrity with pressure gauges, then performing thorough vacuuming after repairs. Don't attempt blindly - have an auto shop diagnose it properly in one go.
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