What is one common sign of a failing compressor?

A common sign of a failing compressor is that the system doesn't cool effectively. The compressor is a crucial component in the HVAC system, responsible for circulating refrigerant through the system and enabling heat exchange to cool the indoor space. When the compressor begins to fail, it can struggle to maintain proper pressure and flow of refrigerant, leading to insufficient cooling. This results in the indoor environment not reaching the desired temperature, causing discomfort and indicating that the compressor may need to be assessed or replaced.

Other scenarios like increased noise or humidity levels, while they can indicate issues within the system, are not direct indicators of compressor failure. Similarly, the system turning on too frequently could relate more to issues such as a malfunctioning thermostat or improper settings, rather than providing a clear sign of compressor problems. Therefore, the lack of effective cooling is a more direct and specific sign associated with compressor failure.