Air conditioning compressor housings should be installed on a pad to keep them elevated and away from soil and moisture that can prematurely deteriorate the unit. In addition, the pad creates a more level surface for the compressor housing to sit on. However, if the ground underneath the pad is not leveled beforehand, the pad can become out of level. This can lead to problems with the compressor fan and other air conditioning components.
When an air conditioning compressor is out of level, this causes stress on the fan bearings that are in motion when the air conditioner is running. As the fan spins at high speed, the bearings become worn out prematurely and can become damaged, requiring repair or even replacement. An out of level compressor can also prevent oil and refrigerant from moving properly through the unit and can become pooled in areas, preventing proper lubrication and movement of the refrigerant between the compressor and the condenser.
Air conditioner compressor housings are very heavy and should be leveled by an HVAC contractor as the unit can be damaged and the refrigerant lines can be disconnected if improperly done. Regular servicing of HVAC equipment is an important part of home maintenance and can help to prevent prolonged issues, such as out of level compressors.