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![]() ![]() Check all other components to be certain this is the cause of the problem. The temperature control board provides the voltage to the fan motors and compressor. If the refrigerator's freezer is cold but the refrigerator is warm the temperature control board might be defective. If the thermistor is defective the refrigerator does not cool or may cool continuously. The thermistor is a sensor which monitors the air temperature. If the freezer is cold but the refrigerator is warm the thermistor might be defective. The evaporator may be frosted up caused by a defrost problem. If the evaporator fan is running, the damper door is open and no air is coming out. If it doesn't open properly it won't let enough cold air into the refrigerator. The air damper control is either an automatic or manually operated door which opens and closes to let more or less cold air into the refrigerator compartment. If the freezer is cold but refrigerator is warm the air damper control might be stuck closed or broken. If the fan fails, the freezer or refrigerator will get much warmer than usual. This fan and motor - called the evaporator fan and motor, draws air over the evaporator coils and circulates it throughout the freezer and refrigerator. A small fan and motor is mounted near the coils. ![]() Every refrigerator has a set of coils called an evaporator. If the refrigerator freezer is cold but the refrigerator is warm, the evaporator fan motor might have failed. The most common cause for this condition is a problem with the defrost system. ![]() If the defrost heater assembly has burned out, or the defrost thermostat or defrost control have failed the frost will build up on the coils and eventually no air will be able to travel through the coils to provide cooling. Several times a day the defrost heater assembly turns on for a few minutes to melt away any frost or ice that may have accumulated on the evaporator coils. If the freezer is cold but the refrigerator is warm and the evaporator coils are frosted over, there may be a defrost system problem. ![]()
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