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FIXED LG LFX31935ST/03 back wall was covered in ice, 2" thick.

Mark T

Premium Member
Joined
Mar 31, 2020
Messages
4
Location
st. louis
Model Number
LFX31935ST
Brand
LG
Age
1-5 years
I defrosted a few minutes till big chunk came off. I opened the back wall and was surprised to find no ice on the coils. There were no error codes, I just saw a lot of frost. Defrosted the unit, put back together plugged it in, ran fine. Next morning had error F dh. I unplugged and plugged back in after few minutes. It has been more than 24 hrs. on error codes. Any thoughts??
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
110,960
Location
McMullen Valley, Arizona
Hi Mark,

Error Code F dH = Freezer Defrost Heater Error

Unplug your refrigerator first. You will need a multimeter to ohm test it.

Here's how: Remove the defrost sensor controller from the freezer side evaporator. Put the sensor inside a small glass and fill it with crushed ice, then just enough water to cover it. LG sensors have a slow response time so leave it in the ice water for five minutes then measure its resistance. At 32*F the sensor should be at 30K ohms, +/- 5%.

Here's the defrost sensor controller for your model you can order if yours tests bad:
6615JB2005R Controller Assembly


There is a video in the part link that shows you how to access it.

Let us know what you find.

Jake
 

Mark T

Premium Member
Joined
Mar 31, 2020
Messages
4
Location
st. louis
Jake,
Thanks for the response. I saw that you had advised the same for a similar situation. I will order, test and post my resuslts.

Thanks,
Mark
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
110,960
Location
McMullen Valley, Arizona
Ok Mark, sounds good.:)

Jake
 

Mark T

Premium Member
Joined
Mar 31, 2020
Messages
4
Location
st. louis
follow up on repair

fixed, I hope!
replaced defrost sensor on 4/4 , no error codes, yay!
in the picture, notice that the orange leads are shorter that original, hope this doesn't cause an issue.

Thanks Jake,

Mark20200404_170618.jpg
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
110,960
Location
McMullen Valley, Arizona
Excellent Mark, glad to hear the new defrost sensor controller fixed it. (y)

Thanks for the update!

notice that the orange leads are shorter that original, hope this doesn't cause an issue.
Hopefully that will be fine.:)

Jake
 
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