Why the ice formed at the Cooling coil of the deep freezer ?

Question

This is about the cooling problem in the Deep Freezer. Becuase of Ice formation in the cooling or Evporator coil, the cooling is reduced.

Answer 1

Make sure the Coils are vacuumed free of dust. IF, that not work, it may be low on freon and have a leak. You can follow the Lines around and look for where they may have vibrated and caused a small hole for a leak. Another thing, you may check the Thermostat, it may not be turning the compressor off when it reach the desired temperature. Then be sure the door seal in good condition, I not sure this be it, but, it may. Be sure the fan works and is clean too.

Answer 2

The ice formed around the coil just as frost forms on the window. As the temperature of an object goes below zero, and the air is relatively humid, the cold surface will cause the water vapor to condense and freeze. Think about it, you let in the 70 degree air into your freezer (0 degrees or below). That air is down right balmy. As it cools, the water is going to condense on the cold surfaces (you will usually get some small frost on the walls) but hte coldest surface by far is the evaporator coil. Once its coated in ice, it acts as an insulation, keeping the coil from effectively cooling the air around it (as the heat energy now has to pass from the air, through the ice (which is slightly cooler) and finally into the coil, where the refrigerant is boiling away absorbing that heat energy. As its doing this, it is also absorbing the energy from the water vapor in the air turning it into ice, which adds more insulation to the coil as well as saps energy from the cooling process. Depending on the freezer, it might have an auto-defroster, which basically warms the coil so the ice melts off. If not you can GENTLY chip it off, or use some kind of mild alcohol or salt depending on the temperature of the coil.