Brand: Model Number: LMXS28626S/08 Main Symptom: won’t cool What happens & when: Compresser fan was making a noise. Cleaned it and front panel displayed FF E code. Unplugged unit to reset with no change. Defrosted unit over night with no change. Freezer temperature displays-1 and refrigerator temperature displays 34 but is 50. Will not make ice. Talked to one of your service reps and she said that it may be the evaporater fan but with the temperature reading being what it is that it may be the control board not working properly so I should contact one of your service technicians to properly diagnose to order correct part. Contacted LG and they were of no help. LG refrigerator model lmxs28626s/08 Thank you in advance
Error Code (if any): FF E
Parts or tests already tried:
Photos / video link:
The error FF E is a freezer evaporator fan error. IS the 50 degree temperature the fresh food section and if it is, what is the actual temperature of the freezer section rather than the displayed temperature? Improper freezer temperatures can affect ice production and if there is a fan failure (including a feedback failure this error would suggest), lack of ice would likely be a symptom of the fan failure.
The actual temperature of the freezer was -5. When I did the defrost there was no water any where. But the panel still said -1 and 34 when I plugged it back in.
More than likely, the freezer fan is not sending the feedback speed signal to the main control board. These fans can get a DC short and this can cause not just error codes, but it can also cause the main control to not operate properly. However, the fresh food sensor and the freezer sensor can be tested to verify if they are working properly or if there might be something else going on. At the connection CON7 of the main control with the power supply cord unplugged and the CON7 connector disconnected, the fresh food sensor can be tested using the white wires at pins 15 and 18. The freezer sensor can be tested using the blue wires with white stripes at pins 17 and 20. What resistances do you find there? Here is the connector layout from what I am able to see.
The wire connection needed to be used would be CON5 with the same color wires mentioned. The freezer sensor can be tested using the blue wires with white stripes at pins 11 and 12. The fresh food sensor can be tested using the white wires at pins 17 and 18.
The wires would be tested. If the reading for the 11 and 12 freezer sensor wires is 16.5K Ohms, it is reading around 5 degrees. If the reading is 2.9K Ohms, the sensor is reading 68 degrees. The fresh food thermistor wires measuring 26.3K Ohms would indicate around 36 degrees, while 12.1K Ohms would indicate around 69 degrees. If the readings do not match what the actual temperature is, there is definitely a sensor failure. This plus an evaporator fan failure would certainly cause issues. It looks like the refrigerator thermistor is only available as a part of the duct assembly. Here are links to the parts for reference.
