Brand:LG
Model Number:LFXS26973D/01
Main Symptom:DH F
What happens & when:about every 30 hours
Error Code (if any):DH F
Parts or tests already tried:
Photos / video link:
This could be caused by a few things. Do you happen to notice an ice slab forming under the freezer drawer? If not, do you have access to a multimeter to test the heater circuit resistance from the main control using the blue wire at pin 2 and the bright orange wire at pin 9 on the wire connector for connection CON3?
I replaced the defrost heater part#mee63545708 and the fridge work well for about 30 hours and then the same code reapearred and then i unplugged the fridge to reset and in about another 30hrs the code showed up again. beginning to wonder if the temp sensor is bad?
It is possible that the defrost sensor could be the cause of failure. It can be tested for resistance to verify if it is operating properly or not. This resistance chart can be used to hep with testing. Aside from that, did you happen to notice if the water was pooling underneath the evaporator and freezing into a slab of ice when you changed out the defrost heater?
there was ice all around the entire evaporator coil,did not notice any ice on the alum. shield underneath the evaporator,there could of been but there was a tremendous amount of ice. I moved the temp. readings to 0 degrees at the freezer from+2 and the fridge part from 40 to 37 degrees after I installed the heater. It took about 12 hours for the fridge to stabilize and start producing ice. This seemed to work but the Code DF H returned,so i unplugged the fridge to reset and again it came back on about 30 hours later. One thing i noticed is that this heater seemed to have 2 silver fuses and one blue on, I put the blue on at the top and the other two between the coil and the coil mounting bracket.
is the defrost sensor the other device that is two wires that also get plugged in at the top next to the heater connection?
It is the other device on the defrost heater. By testing it, this verifies that the sensor is working properly. If the sensor is working properly, and since the heater will work when the system has been reset, the last possibility would be the main control itself. EBR86093702 Main Control Board (Pcb Assembly) | Genuine Lg OEM In Stock
What is the blue two wire device plugged next to the heater plug at the top?
Is the defrost sensor located on the wires connected to the defrost heater? is it the small blue fuse lie piece?
On the defrost heater, the blue wire piece with the aluminum wrap is a thermal fuse. The double orange wire white plastic piece is the defrost sensor. On the other plug with the double blue wire, it is the freezer thermistor which should be seated onto the evaporator cover.
Their appears to be two of the sensors on the brown wire that connects to the defrost heater. The original one that came out of the fridge only had one and I put one in the same place as the first and the second on the next level up,does this make a difference or should it be on the same level as the first one? What is the part# for thermistor?
As the in-line fuses are directly in the heater wire, it should be fine. The thermistor would be the one in this link. 6500JB2002X Temperature Sensor | Genuine Lg OEM In Stock
Could this temp. sensor be the problem?
It is very unlikely.
so your recommendation would be to replace the board on the back of the fridge/ If so which is the correct one? Thanks Alamo
I would recommend testing first. However, if the main control does turn out to be the issue, this link can be used to view the part information page. EBR86093702 Main Control Board (Pcb Assembly) | Genuine Lg OEM In Stock
How often does the fridge defrost heater activate a day?
It depends on how many times the doors are opened, what the ambient temperature is, and how long the compressor operates. It can usually vary from two or three times up to probably five times if there is frequent door opening.
what connector on the board is used for the defrost heater and thermistor?
To test the defrost heater circuit resistance from the main control, use the blue wire at pin 2 and the bright orange wire at pin 9 on the wire connector for connection CON3. To test the defrost sensor, use the brown wire at pin 19 and the brown wire at pin 22 on the wire connector for connection CON7. To test the freezer sensor, use the blue wire with white stripe at pin 17 and the blue wire with white stripe at pin 20 on the wire connector for connection CON7.
