The part(s) or condition(s) listed below for the symptom Refrigerator Freezer is cold but refrigerator is Warm are ordered from most likely to least likely to occur
Defrost heater assembly turns on and off several times during the day to melt any frost that may have been accumulated in the evaporator coils. If the defrost heater assembly is faulty, frost will continue to accumulate in the evaporator coils tamponing the coils. If the evaporator coils are frosted, air flow thru the coils may be restricted, causing the refrigerator not to cool down. Verify the evaporator coil to determine if they are frozen. If they are, test every component of the defrosting system. This is the fist possibility if Refrigerator Freezer is cold but refrigerator is Warm
The evaporator fan moves air over the evaporator coils and circulates it all over the freezer. if the evaporator fan is not working, the freezer or the refrigerator will not cool down properly. To determine if the evaporator fan is faulty; first check the blade of the fan for obstructions like frost, then try spinning the blade with your hand. If the blade does not spin freely, replace the fan. If the fan is unusually loud during operation, replace it. Finally if the fan is not working, use a multimeter to test the continuity in the motor of the fan; if the windings have no continuity, replace the evaporator fan’s motor. This is the second possibility if Refrigerator Freezer is cold but refrigerator is Warm
Damper control opens and closes allowing cold air to flow into the refrigerator compartment. If the regulator is not working properly, it will not open and not enough air will flow to the refrigerator. Check the damper control assembly to make sure it is not broken or jammed.
The sensor that controls air temperature inside the refrigerator and sends the reading to the control board is named thermistor. The control board regulates both the compressor and the evaporator fan in accordance to the thermistor readings. If the thermistor is faulty, then the compressor and the evaporator fan may not function when needed. As a result the refrigerator will not maintain proper temperature. To determine if the thermistor is faulty, test it with a multimeter, the resistance on the thermistor must change as temperature inside the refrigerator changes. If the resistance at the thermistor does not change or the thermistor has no continuity, replace it.
The temperature control board provides electricity to the compressor and the fan motors. If the board is faulty, it will not send energy to the cooling system when required; this however almost never happens. Very often, temperature control boards are misdiagnosed as faulty; before replacing it, test all other most commonly faulty elements. If no other component is faulty, consider replacing the temperature control board
The defrost control board determines how often the defrost cycle is run. If the board is faulty, the refrigerator will not enter the defrost cycle and ice will continue to accumulate in the evaporator coils. If evaporator coils are too frosted, the refrigerator will have to work harder to maintain proper temperature; as a result the refrigerator may too hot. Before replacing the defrost control board, make sure the heater and the defrosting thermostat are functioning correctly. If they are, it’s very likely that the defrost control board is faulty and needs replacement.
The defrost timer turns on the heater several times during the day to melt away any frost accumulating in the evaporator coils. If the timer is faulty, it is possible that the defrost cycle won’t start or that no energy is sent to the heater. . If the timer is faulty, the refrigerator will not enter the defrost cycle and ice will continue to accumulate in the evaporator coils. If evaporator coils are too frosted, the refrigerator will have to work harder to maintain proper temperature; as a result the refrigerator may too hot. To determine if the defrost timer is faulty, slowly advance the dial to the defrosting cycle; compressor must turn off and heater must turn on. If no energy is sent to the defrost components, or it advances out of the defrost cycle, it’s a good indicator that the defrost timer is faulty and need replacement.
The defrost thermostat, controls the temperature on the evaporator coils. When temperature on the evaporator coils falls below the set temperature, thermostat contacts are closed allowing energy to enter the defrost heater during the defrost cycle. During the defrost cycle, the heater melts any frost accumulating in the defrost coils. If the defrost timer is faulty, contacts on the thermostat will not close and energy will not get to the heater. To determine if the defrost thermostat is faulty, use a multimeter. If the thermostat has no continuity when it reaches below operation temperature, replace it.
The main control board regulates energy input for all components on the refrigerator; includen elements of the defrost system. If the main control board is faulty; it may stop sending energy to the defrost system components. This however is rare, main control boards are often misdiagnosed as faulty; before replacing the main control board, test all components of the defrost system, if none of them is faulty; consider replacing the main control board. This is the lower possibility if Refrigerator Freezer is cold but refrigerator is Warm
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