Now, you can look at the compressor of your AC system as its heart – this applies energy to the refrigerant and it is going to conveniently propel it through the coils in order to ensure that the necessary heat exchange is carried properly. With an operational compressor, the air conditioner is not going to produce the cooling effect that you are looking for. With this said, if you find out that the AC is blowing warm air, it could be so that the compressor is not working properly. On the other hand, it might actually be the thermostat which is not set correctly. Or, you might just have a clogged filter.
However, when the entire system starts to show problems, one of the first things that people are usually concerned with is the compressor. With this in mind, there are a few problems that you might experience with it. Since each one of them requires a different approach, it might be a good idea to check them out.

Poor Pressurization

The compressor would function conveniently through a pump action which is synthesized in suction and discharge. This would enable it to draw the liquid refrigerant inside while compressing it into a highly-temperature gas. However, the pressure which is involved with this pump action could be way too low or way too high and this could result in a drop of the cooling power.

Failed Compressor Motor

This is another thing to consider. This is the motor which is going to enable the mechanical action of the compressor and it might have malfunctioned. If it has done so, you wouldn’t be able to rely on the compressor to do its job. In the majority of cases, the failed motor could have been the result of a failed start capacitor. This is a cylindrical part which would send the electrical voltage right to the motor in order to commence operation.

Overheating

This could be the result of wiring issues or, on the other hand, it could be caused by a faulty compressor motor. Regardless of the root, overheating is likely to cause the entire thing to stop functioning which is definitely something that you need to account for.
With all this being said, it’s quite obvious that there are numerous reasons for which you might consider handling the issue as quickly as it’s possible. Failing to do so is going to result in even more complications that you need to take into account. This would undeniably lead to higher expenses that stack up one after another and the financial burden could actually become particularly substantial. This is not something that you want to deal with. That is why it is best not to ignore signs of malfunction of the HVAC unit and deal with it quickly. Calling in the professionals is important as they have the knowledge, skill and tools to deal with the situation.