If your air conditioner's compressor is starting and then shutting off while the blower continues to run, it could indicate a few possible issues. Here are some potential causes for this problem:
Compressor overload: The compressor might be shutting off due to an overload condition. This could be caused by a faulty motor or capacitor, low refrigerant levels, or a blocked condenser coil.
Electrical problem: There could be an issue with the electrical supply to the compressor. This might be a result of a faulty relay, contactor, or wiring connection. Faulty electrical components can cause the compressor to shut off prematurely.
Low refrigerant levels: If the air conditioner is low on refrigerant, it can cause the compressor to shut off. Low refrigerant levels may indicate a leak in the system that needs to be repaired.
Thermostat malfunction: A malfunctioning thermostat can lead to improper control of the cooling system. If the thermostat is not correctly signaling the compressor to continue running, it may shut off prematurely.
It's essential to have a professional HVAC technician diagnose and repair the issue. They will have the necessary knowledge and tools to identify the specific problem with your air conditioner and perform any needed repairs.