Er dH appears on the fridge screen and its seems that means defrost. The fridge is now not really producing cold and things a smelling damp.

Based on the symptoms you described, it is possible that the main control board of your Kenmore refrigerator is faulty. The fact that unplugging and replugging the fridge appears to have temporarily fixed the problem suggests that the issue could be related to the electrical components on the board.
The ER DH error code you received indicates that there is a problem with the defrost circuit. This circuit is responsible for melting any frost that may accumulate on the evaporator coils in the freezer, which can lead to a build-up of ice that affects the fridge's ability to cool.
A faulty main control board can cause issues with various parts of the fridge, including the defrost circuit. If you have already tried unplugging and replugging the fridge and the error code persists, it may be worth contacting a professional technician to diagnose the issue and possibly replace the control board if necessary.

I think you mean a dh error code which is a defrost problem either your sensor or heater is bad

The "Er dH," also known as the Defrost Heater Error message, is displayed when the unit fails to reach 46? F within 2 hours of beginning its defrost cycle. This may be an indication of the defrost heater having broken or the temperature fuse having been pulled out of its slot. Contact customer service if the problem persists after having attempted a system reset.
Quick Fix

• Unplug the refrigerator for 30 seconds and then plug it back in. Doing this will reset all the codes. Sometimes an error appears by fault. If it does not appear again after restarting, then the refrigerator is fine. If the code appears again, then there is a problem with the defroster.
  

Defroster Problem

• The error code itself means that the defroster mode has failed. This means that the defrost mechanism cannot reach 46 degrees Fahrenheit within two hours to defrost ice in the freezer properly. Unplug the refrigerator and move all the items that can spoil into a backup fridge or freezer.
  

Repair

• Look in the back top of the freezer. Use a screwdriver to remove the ice maker machine that blocks the back defrost panel. Remove the two side screws and pull away the plastic cover guard. Check the wire. If it is unplugged, then secure it to see if that is the problem. If the plug is connected, then remove it to check for more problems. Look for any faulted wires on the defroster. If it appears that the wires are fine, you need to replace the defroster panel. Contact your local LG dealer for the specific part number
  

Read more: http://www.ehow.com/info_8705867_lg-refrigerator-error-code-erdh.html#ixzz2udv3MZKA

ER dh means you have defrost issue that needs to be addressed asap. The evaporator has frosted up so badly that the circulating cold air cannot get to the refrigerator. You would need to get inside the freezer back panel and remove it to access into the evaporator coil area. Test the defrost circuits to see if the defrost terminator is broken. If it is, replace it and melt the ice build up as well.
Good luck

dh means defrost problem.replace defrost control and element,behind freezer panel.dont forget to unplug fridge before you work on it

The “er dh” code means a problem with the defrost cycle. It is triggered when the defrost sensor does not reach 46 degrees F within 2 hours of the defrost cycle starting. If indeed the defroster is not working, the evaporator (in the bottom of the fridge in the freezer compartment and behind a plastic cover) will eventually ice up completely, blocking the flow of cold air to the upper compartment. Use a thermometer to check the upper compartment to verify that no or little cool air is reaching it.  If the evaporator is iced up, the defrost cycle is not working. Quick fix to restore operation to the upper compartment: tape over all vent holes in the upper section to keep that cool while you work below. There are about 6-7 vent opens in the back wall and two large one on the floor of upper compartment. Remove freezer door, drawers, slide rails and pull back the plastic cover (2 screws hold it in place, one in the center and one behind the ice maker) at the rear of the freezer section to expose the evaporator. Spray hot water on the ice accumulation on the evaporator (it looks like a radiator) to melt it (remembering to sop up what flows to the drain pan at the rear). The entire operation can be done in about 30 minutes (most time is used for removing ice and sopping up water from the drain pan). All should be ok for 3-4 days depending on humidity before the evaporator ices up again.  In the meantime, order a replacement control board. You can view this by removing a panel w/ 3 screws at the rear left of the refrigerator. This panel controls all refrigerator functions, including defrost. Most likely, the integrated relay for the defrost cycle failed. Swapping out panels is a 10 minute job. Panels cost about $116 incl shipping from repairclinc.com. Shipping is about a week.  You can find a free service manual on line that will help to identify all parts and is particularly useful for removing doors and trays so you can get at the evaporator.  All in all, the customer service is useless. The fridge however is very easy to work on and amazingly simple. The replacement board has a slightly different relay for the defrost heater, so LG may have realized a problem existed with the original. It is also possible that electrical surges damaged the relay.  In any case, 10 minutes and $116 seems pretty minor to have the fridge back to new condition. Good luck.

dh means there is a defrost problem with unit you need to repl the controler in evaporator. you will have food loss if not taken care of asap if is under a year old call the tech out there

The error codes are listed in the service manual (p. 32) at the address below:
LFX25960 Service Manual

"Er dH" seems to be a defroster issue.

it the def t-stat, def. thermistor, or def. fuse whatever lg decides to call it this week that is causing your issue

If you need further help, reach me via phone at https://www.6ya.com/expert/marlon_56d9a24f02585258

I faced the same problem for Kenmore elite Trio Model # 795.77543600 bottom freezer refrigerator. The issue as pointed out by Medeer on fixya.com, turned out to be the part called component assembly, part number 6615JB2005H. I got this replaced yesterday but for 4 hours I did not notice any cooling... so I thought it did not work.... but then in the morning I notice that the issue has been resolved, the refrigerator is cold and there is no eR dH error message. Thanks to all who shared on this site.