LG LFX31925ST/08 refrigerator Parts

Yes. On the LG LFX31925ST, you can typically replace the refrigerator water filter without shutting off the home water supply because the filter housing is designed to stop water flow when the filter is removed. We still recommend turning off the water if you can; it reduces drips and makes a stuck filter easier to handle.

Best practice for a clean, leak-free filter change

• Dispense a few cups of water first to relieve pressure.
• Place a towel under the filter area to catch a small spill.
• Remove the old filter and immediately install the new one (do not leave the housing open).
• Turn the filter until it seats fully; a partially seated filter can leak.
• Flush the system after replacement (see the flushing notes in the LFX31925ST owner's manual).

What to expect if you do not turn off the water

Most of the time you will only see a brief drip or small splash from the filter head. If you see steady leaking after the new filter is installed, the filter is usually not fully seated or the O-rings are not sealing.

Quick troubleshooting checklist

• Reinstall the filter and confirm it is fully locked in place.
• Check for a torn, twisted, or dirty O-ring on the new filter.
• Inspect the filter housing for cracks or debris.
• If the filter will not lock, do not force it; re-align and try again.

Flush guidance (typical for LG refrigerators)

After installing a new filter, we flush water to clear air and carbon fines.

Step	What to do	Why
1	Dispense water in short bursts	Helps purge trapped air
2	Discard the first several containers of water	Clears carbon dust
3	Make and dump the first batch of ice	Clears the ice maker line

Why it matters

Changing the filter with pressure in the line can cause extra dripping and can make a tight filter harder to remove. A careful swap and a proper flush helps protect water taste, ice quality, and the dispenser valve from air pockets.

Last updated: February 2026

The LG LFX31925ST is a full-size 36-inch class bottom-mount (French door) refrigerator with about 30.7 cu. ft. of total capacity. For exact exterior dimensions (height, width, depth with and without handles) and required clearances, use the LFX31925ST owner's manual.

Quick size snapshot (what to plan for)

When you are checking fit, we recommend confirming these items before delivery:

• Width: 36-inch class footprint
• Height: plan for a tall cabinet plus hinge cover clearance
• Depth: depth changes most with handles and door swing
• Clearances: space for ventilation and doors to open fully
• Capacity: about 30.7 cu. ft. total storage

Typical planning ranges for this LG size class

Use these ranges for rough planning, then match your final numbers to the manual.

Measurement	Typical planning range	What changes it most
Width	~35 3/4 to 36 in.	Door design and trim
Height	~69 to 71 in.	Leveling legs, hinge cover
Depth	~33 to 36 in.	Handles, door thickness

How to measure so it fits the first time

• Measure the opening at the top, middle, and bottom; use the smallest measurement.
• Measure depth two ways: to the cabinet and to the front of the handles.
• Leave room for door swing so bins and crispers can slide out.
• Confirm you have space behind the unit for the water line; damaged tubing can require replacement such as refrigerator water tubing MJU62070602.

Why it matters

Correct sizing prevents blocked airflow (poor cooling), doors that cannot open fully, and pinched water lines that can affect the ice maker and dispenser.

Last updated: February 2026

For your LG LFX31925ST refrigerator, the most reliable way to identify the correct water filter is to match the filter part number printed on your current filter or confirm the filter specification listed for your model in the LFX31925ST owner's manual. This prevents fit issues and helps maintain proper water flow and taste.

Fast ways to identify the right filter

• Check the existing filter label: Remove the filter and read the printed model/part number.
• Use the model number: Match your refrigerator model (LFX31925ST) to the filter listed in the manual.
• Look at the filter housing: Many LG housings have a label or diagram showing the compatible filter type.
• Confirm by fit style: Note whether it is a twist-in cartridge, push-in, or drop-down style.
• Replace on schedule: Most refrigerator water filters are replaced about every 6 months, sooner if flow slows.

What to do if water flow is slow after replacing the filter

A new filter can still cause low flow if air is trapped or the filter is not fully seated.

• Dispense water for several minutes to purge air
• Reinstall the filter and confirm it locks fully into place
• Check the household shutoff valve is fully open
• Inspect for kinked or pinched supply line; model-specific tubing is available as refrigerator water tubing MJU62070602

Quick comparison: common “wrong filter” symptoms

Symptom	Most common cause	What we recommend
Water dispenser trickles	Filter not seated, air in line, clogged filter	Reseat filter; purge air; replace if needed
Leaking at filter area	Incorrect filter or damaged O-ring	Verify filter number; inspect seals
Bad taste/odor returns quickly	Old filter, heavy usage, water quality	Replace filter; flush after install

Why it matters

Using the correct filter for the LFX31925ST helps protect the dispenser system from leaks and restrictions, keeps ice and water tasting better, and reduces strain on the water delivery components.

For step-by-step replacement and reset tips, use how to replace the water filter in an LG refrigerator.

Last updated: February 2026

If you do not replace the water filter in your LG LFX31925ST refrigerator, water and ice quality typically drop over time; you can also see slower dispensing and more taste or odor issues as the filter media loads up. For the correct replacement interval and reset steps, follow the LFX31925ST owner's manual.

What you may notice when the filter is overdue

• Water tastes or smells worse (chlorine, “stale” taste, refrigerator odors)
• Ice cubes look cloudy or pick up off-tastes
• Slower water flow at the dispenser
• More sediment or particles in water (especially after plumbing work)
• The filter indicator stays on until it is reset after replacement

Why this happens

A refrigerator water filter is designed to trap particles and reduce certain contaminants. As it fills up, it becomes more restrictive (lower flow) and less effective at improving taste and odor. In some homes, heavy sediment can plug the filter faster.

What we recommend for LFX31925ST

Replace and flush

• Install a new filter on schedule (most refrigerator filters are replaced about every 6 months, sooner with heavy use).
• After installing, dispense and discard several minutes of water to flush carbon fines and air.

Reset the filter light

• Use the control panel reset method shown in the LFX31925ST owner's manual.

If flow is still slow after a new filter

Use this quick check list:

• Confirm the filter is fully seated and locked
• Verify the household shutoff valve is fully open
• Check for kinked or pinched supply line
• Purge trapped air from the dispenser line

Quick impact guide

If you skip filter changes	Most common result	What to do
1 to 3 months overdue	Taste and odor decline	Replace filter, flush water
3 to 12 months overdue	Slow flow, poor ice quality	Replace filter, check supply valve
Long overdue	Higher chance of clogging and sediment	Replace filter, purge air, inspect tubing

Why it matters

Keeping the filter current helps protect water taste, supports normal dispenser flow, and helps your ice maker perform consistently.

Last updated: February 2026

The LG LFX31925ST is a large-capacity bottom-mount refrigerator; this model is commonly listed at about 31 cubic feet total capacity. For the exact capacity breakdown (refrigerator vs. freezer) for your specific configuration, use the specs section in the LFX31925ST owner's manual.

Quick specs snapshot

Spec	Typical listing for LFX31925ST
Total capacity	~31 cu. ft.
Refrigerator type	French door, bottom freezer
Best use case	Larger households, bulk grocery storage

Why you might see slightly different numbers

Capacity can vary a little depending on how it is reported (total vs. usable space) and by minor revisions.

Common reasons listings differ:

• Total capacity vs. compartment capacity (fresh food and freezer shown separately)
• Rounding (for example, 30.7 vs. 31.0 cu. ft.)
• Different measurement standards used by retailers
• Interior features included in “usable” space calculations (bins, ice storage, air ducts)

How to confirm the exact capacity for your refrigerator

We recommend checking the model’s official specs in the manual and on the rating label.

• Look in the specifications section of the LFX31925ST owner's manual
• Check the rating label inside the fresh food compartment (often on a side wall)
• If you are comparing to another refrigerator, compare total capacity and freezer capacity separately

Why it matters

Knowing the true capacity helps when you are planning kitchen fit, food storage needs, and airflow clearance. It also helps when troubleshooting cooling performance because overpacking can restrict air circulation through vents and diffusers.

Last updated: February 2026

For the LG LFX31925ST refrigerator, the compressor is typically covered by a 10-year warranty (often as a limited parts warranty on the compressor itself). For the exact coverage terms, exclusions, and what labor is or is not included, use the warranty section in your LFX31925ST owner's manual.

What “10-year compressor warranty” usually means

A compressor warranty commonly differs from the full appliance warranty. In many cases, the compressor is covered longer than other components, but coverage details vary by purchase date and warranty type.

Check these items in the warranty language:

• Whether coverage is parts-only or parts and labor
• Whether sealed system items (refrigerant, labor, drier) are included
• Whether you must use an authorized servicer
• What proof of purchase is required
• Any exclusions (commercial use, improper installation, etc.)

Quick troubleshooting: is it really a compressor problem?

Before assuming the compressor failed, we recommend checking common look-alikes:

• Condenser coils clogged with dust (can cause warm temps)
• Evaporator fan not running (freezer cold, fridge warm)
• Defrost system issue causing frost buildup
• Control board or sensor issue
• Door gasket leak causing long run times

If you are seeing an error code, use LG bottom freezer refrigerator error codes to narrow the failure area before scheduling service.

Parts that are often involved in “no cooling” diagnoses

These are model-related parts that may be checked during diagnosis (not all are covered under a compressor warranty):

Symptom	Common area to check	Example part for LFX31925ST
Warm fridge and freezer	Sealed system / compressor	Refrigerator compressor TCA38091801
Runs a lot, poor cooling	Airflow and heat rejection	Refrigerator condenser coil ACG73645004
Frost buildup, warming	Defrost sensing	Refrigerator defrost sensor assembly 6615JB2005R

Why it matters

Warranty coverage can save you significant repair cost, but only if the failure matches the covered component and the service process follows the warranty requirements. Confirming the symptom path first helps avoid replacing the wrong part.

Last updated: February 2026

If your LG LFX31925ST bottom freezer is not freezing, the most common causes are poor airflow from frost buildup, a weak or failed compressor system, or a control/sensor problem that prevents the unit from running the cooling cycle long enough. Start with airflow, door sealing, and basic reset checks.

Quick checks we recommend first

• Confirm the freezer is set near 0°F and the refrigerator near 37°F.
• Make sure vents inside the freezer and fresh food section are not blocked by packages.
• Check the door closes fully and the gasket seals all the way around.
• Power reset: unplug for 5 minutes, then restore power.
• Listen for the evaporator fan (a steady fan sound when the doors are closed).

Most likely causes (and what you can look for)

What you notice	Likely issue	What to do next
Frost/ice on back wall of freezer, weak airflow	Defrost system problem (sensor/heater/airflow restriction)	Do a full manual defrost (24 hours unplugged, doors open); if it returns, test defrost components
Freezer warm and fridge also trending warm, compressor runs a lot	Sealed system or compressor problem	Professional service is typically needed for compressor/refrigerant diagnosis
Temps swing, unit seems to “forget” settings, odd behavior	Control board or sensor issue	Check for error codes and inspect wiring connections

Parts that commonly relate to “not freezing” symptoms

These parts are often involved when cooling is weak or inconsistent on this model:

• Refrigerator defrost sensor assembly 6615JB2005R (helps the control manage defrost and temperature feedback)
• Refrigerator compressor TCA38091801 (drives the sealed cooling system)
• Refrigerator condenser coil ACG73645004 (releases heat; if dirty or restricted, cooling performance drops)

Error codes and model-specific guidance

If the display shows an error code (or you suspect a sensor/control issue), use our model documentation and LG-specific code guidance:

• LFX31925ST owner's manual
• LG bottom freezer refrigerator error codes

Why it matters

A freezer that cannot reach 0°F will also struggle to keep ice cream hard and can cause food safety issues. Catching airflow and defrost problems early can prevent heavier compressor run time and more expensive repairs.

Last updated: February 2026