Why isn't the fan working in my No Frost refrigerator?
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This video covers only the main reasons why a fan might malfunction The No Frost system in a refrigerator may not work. If you have a No Frost refrigerator with electronic controls, in addition to the defrost sensor, the operation of the freezer evaporator fan also depends on the control module. Note that the freezer evaporator sensor (defrost sensor) provides the processor with the signal to start. This is much simpler than many people think: for the fan to turn off, the defrost sensor's resistance must equal the resistance of the freezer temperature sensor. When the compressor turns on, the module detects a change in the defrost sensor's resistance and then turns on the fan. If the resistance remains unchanged, the module will not provide the signal to turn on.
Now a little about No Frost refrigerators with mechanical controls. Here, everything is much simpler than in electronic systems: the fan turns on and off along with the compressor (or motor—whichever you prefer), regardless of the freezer evaporator temperature. In this case, the main problem is with the light switch, which also turns on the fan. This video demonstrates this very well. The button may stick, or the plastic that the button presses against may be dented (this requires special attention).
In refrigerators with a No Frost system and mechanical control, almost all brands have 220-volt fans. You can check this by connecting it to the power outlet.
Finally, I can say that when the motor (fan) is running, the shaft wears out, which is why it often jams—this is also something to pay special attention to.