Question about LG LRTBC1825T Top Freezer Refrigerator

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Faulty Freezer & Fridge

In winter my LRTBC1825T has massive ice build up in Freezer, yet drips into Fridge. When Thermostat was adjusted Fridge items froze. Currently, Fridge OK, but Freezer not cold enough even though set on high.

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You have a defrost or temperature control issue or both. I will be back soon with photos and solutions. Thanks, Sea Breeze

Posted on Jul 13, 2009

  • 2 more comments 
  • John Tripp
    John Tripp Jul 13, 2009

    Talking with LG now so please please understand this may take a little time. Never found a refrigerator so hard to get breakdown of the parts before. You are sure we have the model LRTBC1825T

    involved here? I need you to unplug the refrigerator and remove the rear panel inside the freezer to expose the evaporator and the drain pan below it. Defrost with a hair dryer until you can get a meter and we need to check the defrost element and defrost thermostat.

    I am searching to find if your model has the defrost timer or Adaptive Defrost or the complete control board operated. I will find the answers but you can begin with defrosting the freezer section. You can contact me at 864-812-1887 or my email

    Thanks for the rate but we got some work to do to find the reason, Sea Breeze

    SITE 1=>

    SITE 2=>

  • John Tripp
    John Tripp Jul 13, 2009

    Just to let you know I have sent email and spoke on the phone to 3 different divisions of LG so I can get the parts manual. I have worked with LG before and that was a time they had limited information or offered very little support. The message I sent them today was nice, but firm. I will find answers if I have to call their CEO, Sea Breeze

  • John Tripp
    John Tripp Jul 14, 2009

    May I ask you are you from the USA or UK or Canada?

    Because every location has different model numbers because of the power change. The USA runs on 120 volts, 60 cycle, AC while other countries use 240 volts 50 cycles.Sea Breeze

    You may contact me here or through my email

  • John Tripp
    John Tripp Jul 14, 2009

    OK, I have found parts for your refrigerator. Can you or someone open the back panel on the inside of the freezer after you unplug the power cord? I need to have you look at the evaporator coil to see if frozen over because the defrost is defective and or there is a problem with your thermostat. Sea Breeze 864-812-1887 Sea Breeze Appliance Parts and Repair Services



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Have a look inside fridge compartment (especially the "roof", if it's a top-mount freezer) & see if you can see any ice build-up (look inside vents that allow cold air into fridge from freezer section. Also, if top-mount freezer, look inside the freezer compartment for ice build-up on "floor", inside vents, or on back wall. These symptoms, combined with water dripping from lots of the "roof" of fridge section (in a top-mount freezer model), can mean several different problems, so best to re-post with more info/symptoms included.
If there's no ice build-up (& the dividing area between fridge & freezer sections isn't particularly cold, which otherwise might indicate hidden ice build-up), it can be as simple as a plugged or obstructed drain tube, which is VERY COMMON. Easiest solution for this latter problem is to use a flexible plastic tube (think similar type as attached to aquarium air pumps), stuff it into drain hole, and blow on the other end. Sometimes you have to blow quite hard to clear an obstruction or complete blockage. If you can't clear the drain tube, it's likely a different problem. Again, a re-post with more info/symptoms will help narrow it down.

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Your freezer actually cools your fridge. It sounds like you have ice build up in your freezer behind the back panel. You should be able to unscrew the back wall inside your freezer. A hair dryer should help defrost or keep it open for a few and use a screwdriver to remove the build up of ice. The ice has made its way down the vent and when it hits the fridge it is above 32 degrees so it is melting. Hope this helps. I manage rental properties and have had it happen on a few occasions.

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Hi our fridge is building up ice in freezer section & water is leaking out bottom of fridge. I cleaned ice out once but came back nxt day Cheers Wayne

The problem is caused by the failure of either the defrost thermostat or defrost heater. In any case, replacing both the defrost heater and the defrost thermostat is recommended, and that would solve your "ice in freezer" problem.

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Possible that the auto defrost timer is not working and so the massive frost build up. This prevents the air to flow from vent to the fridge.
The auto frost must work on a determined setting of the timer cycle as the frost must clear so that the whole fridge is efficient.
So check the timerr which is normally placed in the rear bottom and is connected to the heater and is also inline with the thermostat.

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1 Answer

Ice building up in fridge

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.
How to check stuff> check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

Your evaporator coils frost up in normal use and every eight hours or so the entire unit shuts down and the defrost heater comes on to melt the frost. This cycle last about 20 minutes. The melted frost drips into a drain pan and through a drain tube to the drain tray under the freezer/refrigerator where it's evaporated by the condenser fan.

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ok first of all. the refrige is in the basement. do you know what the relative humidity in the basement is?

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