LG LFX31945ST/05 refrigerator Parts

The LG LFX31945ST refrigerator is a 30.5 cubic foot model. The “00” or “/05” suffix typically indicates a production or revision version, but it does not usually change the advertised total capacity for the LFX31945ST platform. See the LFX31945ST manual for model identification details.

What to check on your exact unit

If you want to confirm you are matching the right version for parts and specs, we recommend verifying the model tag and comparing it to the documentation.

• Check the model/serial label inside the fresh food compartment (commonly on a side wall).
• Match the model number exactly: LFX31945ST.
• Note any suffix (such as /05) for parts compatibility.
• Use the manual diagrams to confirm component locations before ordering.

Capacity vs. usable space (why numbers can feel different)

“Cubic feet” is the total rated interior volume; shelves, bins, and the ice maker reduce usable space.

Measurement	What it means	What affects it
Total capacity (cu. ft.)	Rated interior volume	Cabinet design
Usable space	What you can actually store	Shelves, bins, ice storage
Fresh food vs. freezer split	How volume is divided	Drawer and compartment layout

Why it matters

Knowing the correct cubic feet helps when comparing replacement refrigerators, planning kitchen fit and storage, and confirming you are looking at the right product family when ordering LG refrigerator parts.

Last updated: January 2026

On the LG LFX31945ST, a leak that shows up at the bottom is most often caused by water from the defrost system not draining correctly (then overflowing and running down), or by a water-supply leak feeding the ice maker. Use the LFX31945ST manual to locate access points and safe shutoff steps.

Quick checks we recommend first

• Unplug the refrigerator before removing interior panels or working near wiring.
• If the leak is near the front, confirm it is not a spill from a door bin or a tipped container.
• If the leak is near the back, inspect the house water line connection and valve area.
• Look for ice buildup on the freezer floor; that often points to a defrost drain issue.
• Check the drain pan area for cracks, misalignment, or overflow.

Most common causes (and what to look for)

What you see	Most likely cause	What to do next
Water/ice on freezer floor, then puddle under unit	Clogged defrost drain or restricted drain tube	Clear the drain path; inspect the refrigerator drain tube 5251JA3003D for blockage or kinks
Puddle near back right/left, especially after ice maker runs	Water inlet valve or supply line seepage	Shut off water; inspect fittings and the refrigerator water inlet valve AJU74532703 for leaks
Water under unit with no ice buildup inside	Drain pan issue or high humidity causing heavy condensation	Verify pan position; clean condenser area and improve airflow

How to clear a suspected defrost drain blockage

1. Remove items from the freezer floor area and look for a sheet of ice.
2. Melt ice with warm air (hair dryer on low) or warm water; do not chip ice with sharp tools.
3. Flush the drain opening with warm water until it flows freely.
4. Check the drain tube at the rear for sludge buildup and clean as needed.

Why it matters

Bottom leaks can lead to floor damage and can also signal a defrost drainage problem that may later cause ice buildup, poor airflow, and warmer temperatures in the fresh food section.

Last updated: January 2026

For LG model LFX31945ST, the exact “5-year warranty” coverage can vary by the refrigerator’s production version and the warranty terms that came with the unit; we use the model’s documentation to confirm what LG covers for year 5 (commonly sealed-system components such as the compressor, condenser, and evaporator). See the LFX31945ST manual for the warranty section tied to your unit.

What “5-year warranty” usually refers to on LG refrigerators

On many LG refrigerators, the longer warranty period is tied to the sealed refrigeration system, not cosmetic parts, shelves, or door bins.

Typical sealed-system components include:

• Compressor
• Condenser coil
• Evaporator
• Refrigerant tubing and related sealed joints

If you are troubleshooting cooling issues and suspect a sealed-system component, these model-matched parts are examples of what may be involved:

• Refrigerator compressor TCA38091801
• Refrigerator condenser coil ACG73645004
• Refrigerator evaporator ADL73341411

What is usually not included in a 5-year coverage window

Even when a longer warranty applies, it often does not cover normal wear items or user-serviceable accessories.

Common examples:

• Air filters and water filters
• Door gaskets and door bins
• Ice maker and dispenser components
• Light lenses, covers, and trim

Quick coverage checklist (general guidance)

Use this as a fast way to sort what you are looking at before you dig into the warranty text.

Item type	Examples	Often part of “5-year” coverage?
Sealed-system cooling parts	compressor, condenser, evaporator	Often yes
Electrical/control parts	control board, user interface	Usually no
Convenience/dispensing parts	ice maker, auger motor, switches	Usually no
Wear/accessory items	filters, gaskets, bins	Usually no

Why it matters

Knowing whether year-5 coverage is sealed-system-only helps you choose the right next step: sealed-system diagnosis is typically a professional repair, while many non-sealed parts (like filters, switches, and gaskets) are straightforward DIY replacements.

Last updated: January 2026

On the LG LFX31945ST bottom-mount refrigerator, the most common “problem” customers report is a cooling imbalance: the refrigerator section gets too warm while the freezer stays cold. On this model, that symptom is often linked to airflow restrictions, defrost-system icing, or temperature sensing and control; we use the LFX31945ST manual to confirm the correct checks and settings.

Most common symptoms

• Fresh food section warms up but freezer stays frozen
• Temperature swings (food spoils early or freezes in the refrigerator)
• Frost or ice buildup on the rear freezer panel
• Unit runs longer than normal, or fan sound changes
• Ice maker output drops when temperatures are unstable

What to check first (no-parts steps)

• Confirm the temperature settings; wait 24 hours after any change
• Make sure interior air vents are not blocked by food containers
• Check that doors close fully and gaskets seal all the way around
• Clean dust from the condenser area and allow airflow around the cabinet
• Look for heavy frost in the freezer that can choke airflow to the refrigerator

Parts that commonly relate to “fridge warm, freezer cold” on this model

If the basic checks do not help, these model-matched parts are commonly involved:

What’s happening	System to suspect	Model-matched example part
Weak airflow into refrigerator section	Airflow/damper	Refrigerator damper motor EAU61524007
Frost buildup and restricted airflow	Defrost sensing	Refrigerator defrost sensor assembly 6615JB2005R
Poor cooling overall or intermittent cooling	Sealed system/compressor	Refrigerator compressor TCA38091801

Why it matters

When the refrigerator section runs warm, food safety and freshness are affected quickly. Catching airflow restrictions or defrost icing early also helps reduce compressor run time and prevents heavier ice buildup.

Last updated: January 2026