The Importance of Regular Filter Drier Maintenance

The filter drier is an essential safety component in any refrigeration or air conditioning system. Its primary job is to absorb system contaminants, such as moisture and acid, which can cause severe damage if left to circulate. Over time, the desiccant material inside the filter drier becomes saturated and can no longer absorb moisture. A saturated filter drier can lead to a number of problems, including frozen expansion valves, acid formation that corrodes compressor windings, and overall system inefficiency. It is best practice to replace the filter drier any time the sealed refrigerant system is opened for service. This simple, low-cost preventative maintenance step can save thousands of dollars in future repairs and extend the life of the entire HVAC unit significantly.