The lubricant in refrigeration and air conditioning systems has many important functions. Even though the circulated refrigerant is the working fluid required for cooling, the lubricant or oil is ...

In any refrigeration system, as refrigerant vapor leaves a compressor, so does a small amount of oil. This oil travels through the discharge line, condenser, liquid line, and evaporator, and then back ...

Underlying causes of AC unit noise . Loud noises from your AC system can stem from many different problems, but understanding ...