What are typical signs that an air conditioning system may need repair?

Strange noises and increased energy bills are clear indicators that an air conditioning system may require repair. When an AC unit is functioning properly, it typically operates quietly and efficiently, maintaining a stable temperature while using energy at expected levels. Strange noises, such as banging, hissing, or grinding, often suggest that there are mechanical issues within the unit, potentially indicating problems with components such as the compressor, fan motor, or other essential parts.

Increased energy bills reflect a drop in the system's efficiency. A well-functioning air conditioning system should not show drastic spikes in energy consumption. When a unit is struggling to maintain the desired temperature due to repairs needed, it can cause higher electricity usage, resulting in an unexpectedly high utility bill. This suggests the need for attention to avoid further damage and maintain comfort in the space it serves.

The other options highlight scenarios that are typical of a properly functioning system or do not adequately indicate repair needs. For instance, consistent temperatures and quiet operation suggest that the system is running efficiently, and strong airflow without temperature fluctuations would indicate effective performance, minimizing suspicion of repair needs. Meanwhile, increased humidity and cold drafts could imply different issues, but they do not specifically point to the repair needs as clearly as strange noises and rising energy