In the machine compartment next to the compressor, the drain tube is used to transfer the water from the evaporator to the drain pan, where it can evaporate. If the drain tube is damaged, the water won't drain from the tray and will overflow into the freezer or refrigerator compartment. If the drain tube is damaged you should replace it.
The bi-metal thermostat-trips, also known as the refrigerator defrost sensor, are used to detect when the temperature of the evaporator is getting hot enough to cause overheating. The power was cut off when the sensor tripped. frost builds up on the evaporator fins of the refrigerator and freezer if the defrost sensor trips. To check the sensor for continuity, you can use the volt-ohm meter. If the sensor doesn't show continuity at 0 degrees F, replace it.
The fan is on the assembly. The air is moved through the cabinet for cooling. If the fan is malfunctioning, replace it.
The frost from the evaporator is melted by the refrigerator automatic defrost system. The compressor stops, the heating element turns on, and the frost starts to melt. There is a drain pan next to the compressor in the machine compartment where the condensate flows through a drain tube. The water left the drain pan before the next thaw. Diagnostic and repair the problem if the defrost process fails.
The intervals between automatic defrost cycles in the refrigerator is controlled by the defrost timer. The control components in the device are moved by the motor of the defrost timer. When the control contacts in the defrost timer advance into the defrost cycle, the compressor stops and the defrost heater turns on for a period of time to melt frost off of the evaporator fins. This encourages more efficient exchange of heat. When the period of defrost ends, the defrost timer contacts switch back to allow normal cooling in the fridge.
There are ice makers and/or water dispensers in many refrigerators. A water leak can be caused by the broken water line in the refrigerator. Water lines inside the refrigerator are being replaced.
When the door is shut, the gasket on the fridge or freezer door prevents air from entering or escaping the cabinet. When the door is closed, a damaged gasket lets warm, moist air into the fridge. The door seal should be replaced if it's damaged.
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