Modern refrigerators LG are equipped with advanced water purification systems that provide families with high-quality drinking water and ice without impurities. However, the resource of any filter element is limited, and over time an indicator lights up on the display, signaling the need for replacement. Ignoring this signal can lead not only to a deterioration in the taste of water, but also to a decrease in the performance of the liquid supply system.
The procedure for replacing a cartridge in refrigerators LG is maximally simplified by engineers and does not require calling a technician or using a special tool. Independent replacement takes only a few minutes if you know the correct sequence of actions and design features your unit. In this article, we will analyze in detail all the stages, from choosing a compatible cartridge to resetting the resource counter.
Before starting work, it is important to understand that a small amount of pressurized water may remain inside the system. Do not be alarmed if, when removing the old element, you notice drops of moisture - this is a normal situation. The main thing is to prepare a dry rag and a container to collect possible splashes so as not to wet the floor or food lying next to the service area.
Determining the type and model of the filter
The first and most critical step is to identify the type of cartridge installed in your refrigerator. Refrigerators LG use different filtration systems depending on the year of manufacture and series of the device. The most common are two main types: cartridges with a rotating mechanism (Twist-type) and models installed in the lower left corner of the freezer.
In order not to make a mistake with your purchase, you need to find the marking on the filter element itself. It is usually located on the end or side surface of the cylinder. Model number often begins with the prefix LT or AD, followed by a set of numbers. If the old cartridge has already been removed and the markings are not readable, information can be found in the operating instructions or on a sticker inside the refrigerator compartment.
Filter model compatibility
The most popular filter models for LG refrigerators include LT700P, LT1000P, ADQ36006101 and ADQ73613401. Despite the external similarity, they may have different connectors and bandwidth, so checking the number is required.
There is also a difference between original filters LG and compatible analogues from third-party manufacturers. Original products guarantee full compliance with the requirements for cleaning and tightness of connections. When choosing an analogue, make sure that it is certified for use with food products and has the necessary approvals.
⚠️ Attention: Using low-quality or incompatible filters can lead to water leaks inside the refrigerator body, which can lead to failure of the electronics and the formation of mold.
Preparation for replacing the filter element
Before you begin to physically remove the old cartridge, you must perform a number of preparatory steps. This will ensure process safety and keep the work area clean. First of all, it is recommended to turn off the water supply to the refrigerator, if such a possibility is provided for by the design of the water supply system in your home.
If there is no separate tap, do not worry - the system is designed to work under pressure, and water will flow out only from the filter pipe itself in a volume of no more than a glass. However, to avoid splashing, place a small container or thick towel directly under the filter location. It is also worth freeing up space in front of the refrigerator for easy access.
☑️ Preparation for replacement
It is also important to prepare the new filter itself. If you just brought it from the store or took it out of cold storage, let it warm up to room temperature. A sharp change in temperature can affect the elasticity of the rubber seals, which is critical for the tightness of the connection.
Step-by-step instructions for removing the old filter
The extraction technology depends on the location of the filter unit. In most modern models LG the filter is located inside the refrigerator compartment, in the upper right corner. To access it, simply open the refrigerator door. In some models, access is provided through a special door at the base of the refrigerator or through the freezer compartment.
If you have a model with a rotating mechanism inside the refrigerator compartment, the action algorithm is as follows. Press the release button on the end of the filter, if there is one, or simply grasp the ribbed part of the housing. Rotate the cartridge counterclockwise approximately 90 degrees. You will hear a characteristic click, after which the filter should freely come out of the slot under its own weight.
In models where the filter is located in the lower left corner (often in the freezer or in the base), the procedure may differ. Here you often need to first press the latch and then pull the cartridge towards you. In some cases, the push-to-release system is used: you need to press firmly on the end of the filter so that it snaps off, and then remove it.
After removing, carefully inspect the seat. There should be no foreign objects, plastic fragments or dirt. If you notice any dirt, gently wipe the inside of the nest with a clean, damp cloth. Make sure that the sealing rings in the depth of the socket are intact and not damaged.
Installing a new cartridge and activation
Installing a new element requires care, since incorrect docking can lead to leaks. The new filter LG always has protective caps or film covering the inlet and outlet holes. Be sure to remove all protective elements before installation, otherwise water will not flow, and the system may be damaged due to excess pressure.
Align the marks on the end of the new filter with the matching marks in the refrigerator socket. Insert the cartridge all the way. If you have a swivel system, turn the filter clockwise until it locks in a horizontal position and is flush with the housing. A click or rotation stop will indicate correct installation.
After physical installation, you must activate the system. Open the water tap on the refrigerator and drain the first 2-3 liters of water. This is necessary in order to fill the internal volume of the new cartridge and wash out the carbon dust, which is a natural component of the filter material. During this period, the water may have a black tint - this is normal.
⚠️ Attention: Do not use the water drained in the first minutes after replacement for cooking or drinking. It contains a carbon suspension and may be unsuitable for consumption.
The final stage of the mechanical part is a leak test. Carefully inspect the junction of the filter and the housing within a few minutes after turning on the water. There should not be a drop of moisture on the dry wipes placed earlier. If you find leakage, try turning the filter slightly or reinstalling it, making sure to remove the protective caps.
Resetting the filter replacement indicator
After successfully replacing the cartridge, you must inform the refrigerator's electronic control unit about this. If this is not done, the “Filter” or “Change Filter” indicator will continue to light or flash, reminding you of the supposedly not completed procedure. Resetting the indicator also starts a new filter life countdown.
The location of the reset button depends on the display model. Refrigerators with an external display usually have a separate button on the door labeled "Filter" or "Filter Reset". On touch control panels, you may need to press long (about 3 seconds) on the same button or a combination of buttons, for example, "Ice Plus" and "Filter" at the same time.
On some models LG with or without an internal display, the reset is done through the settings menu. You need to enter setup mode, find the item responsible for maintenance or filter, and confirm the reset. It is better to check the exact combination for your model in the user manual, since interfaces may differ.
After a successful reset, the indicator should go out or change color to green/blue, which means normal operation of the system. If the indicator remains on after several reset attempts, the filter may not be fully installed or there is a malfunction of the water flow sensor.
Replacement frequency and compatibility table
The manufacturer LG recommends changing the water purification filter every 6 months or after filtering 300 liters of water (depending on what will come earlier). However, the actual frequency of replacement may depend on the quality of tap water in your region and the intensity of use of the refrigerator.
If the water begins to smell worse, its taste has changed, or the flow pressure has noticeably decreased when filling a glass, replacement should be done before the scheduled time. A clogged filter creates high flow resistance, which increases the load on the water supply system pump.
Below is a table of correspondence between popular filter models and refrigerator series LG, which will help you navigate when purchasing:
| Filter model | Type installations | Resource (liters) | Compatible LG series |
|---|---|---|---|
| LT700P / ADQ36006101 | Rotary (inside) | 300 l | LFCS, LFXS, GR-B |
| LT1000P | Rotary (inside) | 300 l | LFCS28, LFXS26 |
| ADQ73613401 | Vertical (bottom) | 300 l | GR-C, GC-B |
| LT500P | Rotary (inside) | 200 l | Old models LFX |
Possible problems and ways to solve them
Even if all instructions are followed, users may encounter a number of typical problems. One of the most common is the lack of water after replacing the filter. In 90% of cases, the cause lies in an airlock. The system needs to “bleed”, so fill and pour out several full containers of water, pausing periodically.
Another common problem is a leak at the connection. Once you are sure that the protective caps have been removed and the filter is installed correctly, check the O-rings. There should be no creases, sand or lint on them. Sometimes a light lubrication with silicone grease (food grade) helps to improve the seal.
If the refrigerator makes strange sounds (humming, gurgling) immediately after replacement, this is also a result of air in the system. Usually these sounds go away on their own during a day of active use. However, if the noise persists and is accompanied by vibration, it is worth checking whether the filter is seated correctly in the grooves.
⚠️ Attention: If, after replacing the filter, the water level indicator (if any) shows incorrect data, you may need to completely reset the refrigerator by unplugging it for 1-2 minutes.
In rare cases, a new one the filter may be defective. If after all the attempts the water does not flow or flows by, try installing the old filter back. If the system works normally with it, then the new cartridge is defective and must be returned to the store.
Can the filter be washed and reused?
It is absolutely not possible. Carbon filters LG are disposable. Washing with water does not restore their adsorbing properties, but only washes the accumulated dirt out, after which the filter will become a source of bacteria. Repeated use guarantees poor water quality.
What to do if the indicator does not reset?
Try resetting with the refrigerator door closed. Make sure you hold the button long enough (sometimes it takes up to 5 seconds). If this does not help, unplug the refrigerator for 10-15 seconds, then turn it on and repeat the reset procedure.
Does water hardness affect the life of the filter?
Yes, it does significantly. In regions with very hard water or water with a high content of mechanical impurities, the filter life may be reduced to 3-4 months. In such cases, it is recommended to install additional pre-filters on the water inlet line to the apartment.
Do the seals of the new filter need to be lubricated?
In most cases, factory lubrication is sufficient. However, if the seals appear dry, a minimal amount of food grade Vaseline or silicone lubricant can be applied. This will make installation easier and improve the seal, but do not overdo it so as not to stain the water.
Why does the water have a strange taste after replacement?
In the first days of operation, a slight aftertaste is possible due to the new plastic and carbon filler. This is fine. It is recommended to drain at least 5-7 liters of water. If the taste persists for more than a week, the filter may be of poor quality or its expiration date has expired.