A Filter Drier is an important part of an air conditioning system. A Filter Drier is so important that manufacturers normally supply one to install with a new home comfort system. ... Absorb system contaminants, such as water, which can create acids.

What happens if you don't install a filter drier?

Different desiccants. The filter-drier is placed in the liquid line to filter out all the garbage — including moisture — that can flow through the system (e.g., dirt, metal shavings, etc.). ... If the suction line drier is left in long enough, it may become fully saturated if there's a lot of moisture present.

What is the main purpose of a filter drier?

It is important to locate a filter-drier in a refrigeration system. Its role is to remove moisture from the refrigerant and lubricant by absorbing and retaining moisture deep within the desiccant granules.