What happens when a ac compressor is undercharged?

When an AC compressor is undercharged, it lacks sufficient refrigerant to effectively absorb heat from the indoor air. This can lead to inadequate cooling performance, increased energy consumption, and potential overheating of the compressor. Over time, the compressor may suffer damage or failure due to operating under stress, as it struggles to maintain proper pressure and temperature levels. Additionally, it can cause the system to freeze up, further hindering its efficiency.