Don’t Choke the A/C

The outdoor compressor for central air conditioning is the heart of the system. It re-cools the hot refrigerant from the indoor coil located in the systems air handler. The efficiency of the system is greatly dependant on how well the compressor is able to perform this function. It is important therefore to be certain the compressor is able to breathe freely in order to dissipate the heat from the indoor coil. Unfortunately do to homeowner neglect and or poor initial installation this is too often not the case.

The first two photos are quite a common occurrence. Mulch packed up and around the unit and encroaching landscaping vegetation. There are times when the plantings are actually growing through the compressors. The mulch is especially a problem because the fine particles will be sucked into the unit and clog the cooling fins.

The lower two photos are examples of bad installations. In the third picture the compressors are too close to each other and the home. The bottom photo the unit is actually touching the foundation wall. Clearance around the unit should be a minimum of one to two feet and above three to four feet.

These problems will decrease the general efficiency of the compressor causing the unit to run longer and work harder. This will result in the home not cooling down sufficiently, especially on extremely hot days, and energy use going way up.

Having the outdoor compressor serviced by a qualified HVAC technician before every cooling season begins is  good, sensible general maintenance. Also not forgetting to service the indoor cooling coil and air handler are equally as important.

James Quarello
JRV Home Inspection Services, LLC