Locate the condenser coil.
There are two sets of coils for cooling appliances like refrigerators, they are called the evaporator3
coils. Overly simplified, the two coils are filled with gas and liquid respectively, and are parts of a complex "circuit" that has a compressor4
and expansion valve2
that perform the work. The gas filled evaporator coil is located in the space to be cooled, and performs the task by absorbing heat
from that space. It is usually protected from damage and out of view inside the freezer section. The "heated" gas is compressed by the compressor, where it is further heated (hot to the touch) by the compression process. The heated compressed gas and liquid is passed through the condenser coil that is located away from the cooled space. This condenser coil is where some of the heat in the liquid is released to the ambient air. The cooled liquid is then drawn through the expansion valve
by the suction of the compressor, where the liquid immediately boils off to a gas. This causes the temperature of the gas to drop significantly (well below freezing) in the evaporator coil. The process repeats until the thermostat in the space is satisfied. Because the condenser coil is exposed to the ambient air on the refrigerator, it requires regular cleaning
. There are a few locations that the condenser coil may be found:
- Older refrigerators have the coil (a grid-like structure often painted black) mounted on the rear of the refrigerator.
- Newer refrigerators often locate the condenser coil at the bottom. It is likely that a fan (that may or may not be readily visible) will be directed at the coil to assist with heat dissipation. Use a flashlight to assist locating the coil and fan if needed. The coil will be accessible from one of two places:
- Toe space panel. Remove the panel at the bottom of the front of the refrigerator and carefully slide the condensate tray out (if present, the condensate tray may contain water). A visual inspection upward into this space may reveal a flat condenser coil when located here.
- Rear access panel. If not found behind the toe space, the refrigerator will have to be slid away from the wall further to work from behind. Disconnect water supply lines if too short to allow enough room to work. Remove the fasteners that holds an access panel in position. The condenser coil may be flat, but will likely be cylindrical in shape when located here.