Evaporator fan not running

Condenser Coils are Dirty
If the refrigerator is not cold enough the condenser coils may be dirty. The condenser is like a radiator and must stay clean in order to dissipate the heat which was removed from the inside of the refrigerator. As the coils get dirtier the refrigerator becomes less efficient, which makes it work harder to cool down. If the coils are dirty enough, the unit will never be cold enough and will not be able to cool the inside of the refrigerator to the proper temperature.
Evaporator Fan Motor
If the refrigerator is not cold enough, the evaporator fan motor might have failed. Every refrigerator has a set of coils called an evaporator. The refrigerator may have one or more evaporator fan motor(s) depending on the model and evaporator locations. The evaporator fan motor circulates the cold air from the coils thru the compartment. If there is only one evaporator it is in the freezer side. If the fan is not working, no cold air will get to the refrigerator compartment. The freezer may still get cold.
Condenser Fan Motor
If the refrigerator is not cold enough there might be something caught in the condenser fan motor blade, or the condenser fan motor might be defective. The condenser fan motor draws air over the condenser coils to cool them. The condenser fan motor is located underneath the refrigerator near the back. Pull the refrigerator out from the wall and remove the access panel to access it.
Start Relay
If the refrigerator is not cold enough, the start relay may be defective. The start relay is a small device mounted to the side of the compressor. It provides power to the run winding along with the start winding for a split second at start-up to help get the compressor started. If the start relay is defective the compressor may run intermittently or not at all and the refrigerator will not get cold enough. The start relay should be replaced if defective.
Temperature Control Thermostat
If the refrigerator does not get cold enough the temperature control thermostat might be defective. The thermostat allows power to flow through to the compressor, evaporator fan and condenser fan. If the cooling system fans and compressor are running, but the refrigerator or freezer is not cooling correctly check for an airflow or defrost system problem.
Start Capacitor
If the refrigerator isn't cold enough the compressor might be having difficulty starting. The start capacitor serves as a battery to give the compressor a little boost during start-up. If the start capacitor is burned out the compressor might not be able to start and run as often as it should. Test the start capacitor first with a capacitance meter, they don't fail often. If it's defective, replace it.
Thermistor
If the refrigerator is not cold enough the thermistor might be defective. The thermistor is a sensor which monitors the air temperature. It is connected to the control board. If the thermistor is defective the refrigerator does not cool or may cool continuously.
Temperature Control Board
If the refrigerator is not cold enough the temperature control board might be defective. The temperature control board provides the voltage to the fan motors and compressor. These boards are often misdiagnosed. Check all other components to be certain this is the cause of the problem.
Compressor
If the refrigerator is not cold enough, the compressor might be defective. The compressor is a motor which compresses the refrigerant and circulates the refrigerant through the evaporator and condenser coils. There are several other components which are more likely to be defective if the compressor doesn't work. If the compressor itself is defective a licensed professional will need to replace it.
Main Control Board
If the refrigerator is not cold enough the main control board might be defective. This is not common. Check the defrost system, cooling fans, and cooling controls first.

Condenser Coils are Dirty
If the refrigerator is not cold enough the condenser coils may be dirty. The condenser is like a radiator and must stay clean in order to dissipate the heat which was removed from the inside of the refrigerator. As the coils get dirtier the refrigerator becomes less efficient, which makes it work harder to cool down. If the coils are dirty enough, the unit will never be cold enough and will not be able to cool the inside of the refrigerator to the proper temperature.
Evaporator Fan Motor
If the refrigerator is not cold enough, the evaporator fan motor might have failed. Every refrigerator has a set of coils called an evaporator. The refrigerator may have one or more evaporator fan motor(s) depending on the model and evaporator locations. The evaporator fan motor circulates the cold air from the coils thru the compartment. If there is only one evaporator it is in the freezer side. If the fan is not working, no cold air will get to the refrigerator compartment. The freezer may still get cold.
Condenser Fan Motor
If the refrigerator is not cold enough there might be something caught in the condenser fan motor blade, or the condenser fan motor might be defective. The condenser fan motor draws air over the condenser coils to cool them. The condenser fan motor is located underneath the refrigerator near the back. Pull the refrigerator out from the wall and remove the access panel to access it.
Start Relay
If the refrigerator is not cold enough, the start relay may be defective. The start relay is a small device mounted to the side of the compressor. It provides power to the run winding along with the start winding for a split second at start-up to help get the compressor started. If the start relay is defective the compressor may run intermittently or not at all and the refrigerator will not get cold enough. The start relay should be replaced if defective.
Temperature Control Thermostat
If the refrigerator does not get cold enough the temperature control thermostat might be defective. The thermostat allows power to flow through to the compressor, evaporator fan and condenser fan. If the cooling system fans and compressor are running, but the refrigerator or freezer is not cooling correctly check for an airflow or defrost system problem.
Start Capacitor
If the refrigerator isn't cold enough the compressor might be having difficulty starting. The start capacitor serves as a battery to give the compressor a little boost during start-up. If the start capacitor is burned out the compressor might not be able to start and run as often as it should. Test the start capacitor first with a capacitance meter, they don't fail often. If it's defective, replace it.
Thermistor
If the refrigerator is not cold enough the thermistor might be defective. The thermistor is a sensor which monitors the air temperature. It is connected to the control board. If the thermistor is defective the refrigerator does not cool or may cool continuously.
Temperature Control Board
If the refrigerator is not cold enough the temperature control board might be defective. The temperature control board provides the voltage to the fan motors and compressor. These boards are often misdiagnosed. Check all other components to be certain this is the cause of the problem.
Compressor
If the refrigerator is not cold enough, the compressor might be defective. The compressor is a motor which compresses the refrigerant and circulates the refrigerant through the evaporator and condenser coils. There are several other components which are more likely to be defective if the compressor doesn't work. If the compressor itself is defective a licensed professional will need to replace it.
Main Control Board
If the refrigerator is not cold enough the main control board might be defective. This is not common. Check the defrost system, cooling fans, and cooling controls first.

According to the TROUBLE PUNDITS at
applianepartspros (see below)

You either have a 12vdc EVAPORATOR FAN failure... or the control board is defective...

Check it out

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I have a Frigidaire refrigerator. The error codes messages are EF and SY. The part # is: 241509402 and model # is: LGHS2634KP0 D. W for Model Number 241509402

ANSWER Hello D. W. The error code that you are getting indicates a Evaporator fan 241509402 failure. You want to check the wiring at the fan motor and at the control board. Check for 12vdc to fan between red and brown wires. Check for variant voltage (depending on high or low speed) between yellow and brown. If it checks ok then replace the Evaporator fan. If error code still exists then replace main control board 5303918514. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html

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Carnac the Magnificent

This error code Er FF indicates a problem with the evaporator fan motor but it can also be with the main control board. When the power cord is disconnected for 30 seconds and then reconnected, it resets the board. Sometimes this procedure corrects the problem and sometimes it does, for only a short period of time. Usually in this case, the main board will need to be replaced. First it needs to be determined if the fan motor is running or not. If the motor is still running, the main board, which is located behind the unit, will need to be replaced. If the motor is not running, some voltage checks will need to be made to, determine if the motor has failed or if the board is not sending voltage to the motor. These are some difficult checks to make and the motor can be a difficult repair, which will require a technician.

Hi, your unit has a loose harness behind the fan motor at the wall. Manually push in every wire to assure a good connection, the error you have is that the control can't sense the fan speed. Unplug the unit when you do this to assure the computer can see and sense the fan. Failure to unplug first will not work. Good Luck.... PS once fixed use a sealant to keep these connection tight and clean.

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

The code "E - F" is related to evaporator fan motor. You have a bad evap fan. This is the fan that is behind the back panel INSIDE the freezer.
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This code is for the evaporator fan motor but it could also be due to a defective main board. If the fan motor in the freezer is still running, disconnect power to the refrigerator for 30 seconds and then reconnect it. This resets the board. If the code disappears and the motor is still running, it may be ok now but if the code reappears, the board will need to be replaced.If the motor is not running, some voltage checks will need to be made at the motor and at the board.------------The EF error code indicates a problem has been detected with the freezer fan motor (evaporator fan). This type of symptom could be caused by the fan motor stalled out on some type of obstruction, defective fan motor, faulty wiring or the main control board.

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you can get required parts from sears part direct online site or from repairclinic.com site.---------

This should help.Thanks,.Helpmech.

I have this video on how to replace evaporator fan motor and main board on GE refrigerator. Check it out. Hope this Helps.

This is the main PCB diagram of the indoor unit of LG LS-K1830 model.

• Check the shown capacitor. Lift one leg then connect the test leads of the ohmmeter to the capacitor terminals. Do the same with the test leads in reverse. The pointer should deflect quickly to the right then slowly deflect back to the left on both instances. Otherwise the capacitor is bad and must be replaced with the same specifications.

• If the capacitor is good or the problem still exist after the capacitor is replaced, check the voltage between the 2 inner terminals of the motor harness 4-pin connector as shown above. Voltage should read about 5 volts. If voltage is below 5V or not present, replace the indoor unit main board assembly.

• Check the voltage between the labeled terminals of the 5-pin connector shown above. The voltage should be about 17 volts. If voltages is below 17 volts or not present, check the connection between the indoor and outdoor unit main boards. If connection is good, replace the outdoor unit main board.
  

This is an error code that pertains to the evaporator motor but could also be the main board.
If the evaporator motor is running, the main board will probably need to be replaced.
It could be a wiring problem but it's not very likely.

If the motor is not running, some voltage checks will need to be made, at the motor and board, to determine which component has failed.
These checks require a meter and can be difficult to make, even for a technician.

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It is possible you have a defective fan motor in the condenser area or evaporator area. Sometimes when they become defective they will run for a while and just warm up and stop while the compressor continues to run. I learned that one on four costly returns to the home. The cost was to me not the customer. Thanks, Sea Breeze