If your AC compressor is running but no coolant is coming out, it indicates a potential issue with the AC system. There could be several reasons for this problem, and it's difficult to determine the exact cause without further inspection. Here are a few possible explanations:
Insufficient refrigerant: Low refrigerant levels can prevent the coolant from reaching the compressor. This could be due to a leak in the system or an improper initial charge.
Faulty compressor: While the compressor is running, it may not be functioning properly, resulting in a lack of refrigerant circulation. The compressor could be worn out, damaged, or experiencing an electrical issue.
Blocked refrigerant line: A blockage in the refrigerant line can restrict the flow of coolant, preventing it from reaching the compressor. This blockage can be caused by debris, ice buildup, or a malfunctioning expansion valve.
Malfunctioning expansion valve: The expansion valve regulates the flow of refrigerant into the evaporator coil. If it fails to open or close properly, it can impede the coolant's movement and lead to a lack of cooling.
It's essential to have a professional HVAC technician inspect and diagnose the issue accurately. They will be able to assess the system, identify the root cause, and recommend the appropriate solution. It may not necessarily be just the compressor that needs to be replaced; other components or repairs might be necessary depending on the specific problem.