Final answer:
In the context of an air conditioner (A/C), the term 'arm' is not typically used. Various components such as the compressor, condenser, evaporator, refrigerant lines, and blower fan work together to cool or heat the air.
Step-by-step explanation:
In the context of an air conditioner (A/C), the term 'arm' is not typically used. It is possible that there may be a misunderstanding or a typo in the question. However, in the context of an A/C installation, various components are involved such as the compressor, condenser, evaporator, refrigerant lines, and blower fan. These components work together to cool or heat the air. If you have any specific components or terminology associated with the A/C installation, please provide more information so that I can assist you better.