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Author Topic: LG French Door (LFX31925) Freezer Cold, Fridge not  (Read 15057 times)

Offline agreif11

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LG French Door (LFX31925) Freezer Cold, Fridge not
« on: March 01, 2013, 07:43:06 AM »

Guys, have the above mentioned model.  With the freezer set to -4F on the control panel and the fridge set to 33F, the Freezer is at -8F and the fridge is 40F.  Anyone have any idea what could be causing this one.  Is the damper adjustable in these models where it could be somehow set too "closed".  Just want to know what my options are to check.  I'm not sure if this fridge has a temperature compensation resistor, but  it would seem the freezer is ok, so I wouldn't immediately think that would be a possible solution.

Thanks in advance for the help,
Andrew

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #1 on: March 01, 2013, 07:51:39 AM »
This is a dual evap model. Check resistance temperature detector against its supposed reading while unconnected from main pcb. Per LG they have up to a 7-10 degree temp swing. Either way.  :D

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #2 on: March 01, 2013, 09:06:18 AM »
Is that on the Con5 wiring?  the only schematic I hase is for a LFX25960 Fridge.

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #3 on: March 01, 2013, 10:48:30 AM »
They will not be the same. The back of unit should hae large decal of diagram. The main pcb will have markings as well. :D

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #4 on: March 01, 2013, 06:19:59 PM »
Well, they replaced the board.  We'll see if that does it, but after 3 hours, temp hasn't really gone down.  I'll give it overnight to see if it actually goes down.  Not sure what else it would be.

Andrew

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #5 on: March 01, 2013, 10:19:44 PM »
There is an update for the main pcb and freezer grille/fan assembly. Hopefully they installed the updated set of parts.  :D

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #6 on: March 02, 2013, 01:19:20 AM »
Well, 8 hours later, and the temp in teh fridge hasn't gone down.  Looks like replacing the fridge board didn't do the trick.  Not sure if it matters at all, but this fridge was manufactured on Sep of 2012.  The tech made it sound like this was all he could do on this one.  He wasn't sure what else could be done.

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #7 on: March 02, 2013, 07:41:36 AM »
I would still ohm out the fridge temp sensor, just in case. Also, make sure your reading product temp and NOT air temp. I know they correspond but a much more accurate way is product temp. :D

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #8 on: March 02, 2013, 09:51:14 AM »
Yeah, I'm measuring both air and thermometer in a glass of water.

Offline niobrara

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #9 on: March 02, 2013, 10:57:21 AM »
I have replaced a couple of the boards and grills that other techs have ordered. It did not fix the issue. One had a fan error, so I ordered the fan.  It fixed the issue. On the other I have not received  feedback yet. It did not have a fan error on it. Sensor tested ok. If the sensor tests, is the fan running.

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #10 on: March 02, 2013, 02:24:33 PM »
I have replaced a couple of the boards and grills that other techs have ordered. It did not fix the issue. One had a fan error, so I ordered the fan.  It fixed the issue. On the other I have not received  feedback yet. It did not have a fan error on it. Sensor tested ok. If the sensor tests, is the fan running.
The update is specifically for ER IF, Ice fan error. It WILL resolve THAT issue but remember, they JUST updated the part numbers again. IMHO, main pcbs are pretty robust on lg fridges. :D

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #11 on: March 02, 2013, 02:29:05 PM »
Yeah, I didn't see any "ER"code pop up on the display, so relying on the tech to have checked that out of it could have been an issue.  At this point I think this fridge is going back.  Does anyone have a service manual for this thing?

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #12 on: March 02, 2013, 02:31:54 PM »
I should have access, anything in particular you are looking for? I will do my best. :D

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #13 on: March 02, 2013, 02:56:19 PM »
the main service manual would be great.  the electronics along with how to disassemble the water dispenser would be great.

Offline niobrara

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #14 on: March 02, 2013, 02:56:52 PM »
domain what are they changing on the boards and is there any way to tell if the board you get is a updated one ? Thanks

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #15 on: March 02, 2013, 03:23:14 PM »
YA BUDDY YOU CAN. Look at your new and old PCBs, and on one of the TWO larger BROWN caps for the inverter side, will have a white label with the exact part number located on it. You will also notice the upper 3 connectors will be longer than the original versions. Original version ended in 01, which led to 09 and now is 16. It is a software update to keep the fans off longer after defrost to let the water sheen off and enter the tray in the compressor compartment versus pull the moisture back up into the fan assemblies and or freezer section. The grille assembly will have more exhaust vents and the intake will be partially blocked off causing a higher overall pressure in the freezer. This will help prevent moisture from being sucked in when the freezer compartment is accessed. The fan and or main have also increased the torque to provide better starting and airflow on the newest updated parts. :D

Offline niobrara

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #16 on: March 02, 2013, 05:51:36 PM »
Cool,Thanks for the information. I hated replacing there boards without knowing if I was getting a updated board. Besides the grills are so easy to replace.Just remove everything in the freezer. Really like to know what I'm replacing will correct the issue. I still remember there first air flow fixes !! They really seem do be moving ahead on there ref designs. I always liked there set up just hated the ice up issues. Really glad to know about the boards.

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #17 on: March 02, 2013, 05:52:40 PM »
OK, if you can point out where in the service manual these parts are called out, that would be perfect so I can check it and know where to check the resistance that you initially talked about.

Offline agreif11

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #18 on: March 02, 2013, 09:31:40 PM »
So air temp is varying anywhere between 44 and 36/7ish but the glass of water has never dipped below 40F.

Offline domain

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Re: LG French Door (LFX31925) Freezer Cold, Fridge not
« Reply #19 on: March 02, 2013, 09:46:13 PM »
Thats a tough on. Per lg there is a 7 to 10 degree swing on their thermisters. Hmmm.  :D