Common Causes of Air Conditioner Compressor Failure

Air Conditioner Installation Diy
Air conditioning units are mechanical devices that are designed to maintain the temperature of interior areas within a specific range. These machines serve that purpose via an automated and complex process of liquefying gas that is converted it back to a gaseous form. A primary air conditioner component that is indispensable for adequate cooling function is the compressor.

Air Conditioner Compressor FailureAs the name implies, that unit compresses fluid into a more compact molecular structure to raise its heat level and thereby release latent energy. Once fluid flows from compressor to condenser, its physical form has already been altered into a highly pressurized gaseous state.

Due to the vital role that compressors play in air cooling capability, it is very important to maintain them in good working order.

Troubleshoot Air Conditioner Compressor Failure

Following are several basic steps you can take to troubleshoot air conditioner compressor failure:

1. Shut off the power and examine all wires and connections for damage. Look for wiring or connections that have become frayed, loosened, burned or exhibit excessive wear and tear. Also, verify that all temperature settings are below room temperature. This should be done after the AC has been operating for around 15 minutes.

If both compressor and condenser fan are working but cooling power is low, conduct a temperature drop check. That procedure is performed by deducting incoming airflow temperature from exhausted air temperature. Drastic drops in the temperature might indicate that refrigerant recharge is necessary.

3. A condensing fan that activates and operates correctly, while the compressor won’t budge could indicate a broken or overheated compressor. Another likely culprit is low refrigerant.

4. Check the fan motor regularly, as it could adversely impact compressor function. For example, fan motors may lock up during active operation or have bad windings. Defective components like worn out rotor bars or thrust bearings may be at fault as well.

On the other hand, your entire motor might need to be completely replaced. All the above malfunctions can directly affect the proper operation of both the compressor and your entire AC unit. When the compressor comes on but the fan does not, your condenser fan motor could be responsible for the problem.

5. Several possible causes may account for air conditioner compressor failure. Chief among them are blown fuse(es); a bad capacitator; a non-functional motor overload protector; a seized compressor; wire burns, compressor valve dysfunction; detached compressor mounts; imbalanced internal valve pressure, and/or a motor that has become grounded.

No air conditioning unit can operate correctly unless the compressor is also working properly. Thus, it is essential to keep in mind that internal air conditioner parts are extremely complex and very fragile. Consequently, it is always best to leave failed AC compressor diagnosis in the hands of a professional with the proper expertise, experience and equipment.

This helps you avoid creating a far worse problem for yourself due to inept repair efforts. Not to mention possibly saving the lives of you and/or your family by preventing accidental electrocution or even a fatal house fire!

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