LG LFX25991ST/01 refrigerator Parts

The LG LFX25991ST is a 36-inch-wide French door, bottom-freezer refrigerator. For exact cabinet and door-swing measurements (width, depth, height, and clearance needs), we recommend confirming the specifications in the LFX25991ST owner's manual.

Typical dimensions you should plan for

Most 36-inch LG French door refrigerators of this style fall into these common ranges (your exact numbers can vary by configuration and door position):

• Width: about 35 3/4 in. to 36 in.
• Height: about 69 in. to 71 in.
• Depth (case): about 34 in. to 36 1/2 in.
• Depth with doors open: often 47 in. to 50 in.
• Water pressure (if connected): typically 21 to 121 PSI

How to measure for fit (so it installs cleanly)

Use a tape measure and check these before delivery or moving the unit:

• Opening width at the front and back (some alcoves taper)
• Height to the lowest cabinet or trim above the refrigerator
• Depth to the wall plus clearance for the water line
• Door swing clearance (including handles)
• Pathway clearance (doorways, turns, and stairs)

Quick planning table

What you are checking	What to measure	Why it matters
Cabinet opening	Width, height, depth	Prevents binding and vibration
Door swing	Depth with doors open	Ensures drawers and doors fully open
Water hookup	Supply location and pressure	Helps avoid leaks and low ice production

Why it matters

A refrigerator that is “36-inch” class can still vary in depth and door-open clearance. Confirming the exact specs helps prevent installation issues, poor door alignment, and restricted airflow that can affect cooling performance.

Last updated: January 2026

For the LG LFX25991ST, the most common customer-reported issue is a cooling problem (refrigerator or freezer not staying cold). In this model family, cooling complaints are often tied to the sealed system (compressor, condenser, evaporator) or airflow/defrost components that can restrict cold-air circulation.

Quick checks we recommend first

• Confirm the doors close and seal fully; warm air leaks can mimic a cooling failure.
• Make sure vents inside the fresh food section are not blocked by food packages.
• If the unit is in a hot, humid area or the doors are opened often, expect more condensation and temperature swings.
• Listen for fan noise; a failed evaporator fan can cause warm temperatures even if the compressor runs.
• If odors are present, set the air filter to MAX; if odor remains after 24 hours, replace the filter.

Parts that commonly relate to cooling complaints

If basic checks do not help, these model-matched parts are often involved in “not cooling” symptoms:

Symptom	Common area to inspect	Example model-matched part
Warm refrigerator and/or freezer	Sealed system cooling	Refrigerator compressor TCA38091801
Poor heat release, long run times	Condenser area	Refrigerator condenser coil ACG73645004
Frost buildup, warming over time	Defrost sensing/control	Refrigerator defrost sensor assembly 6615JB2005R

When to use built-in diagnostics

This LG refrigerator supports Smart Diagnosis through LG support. We follow the steps in the LFX25991ST owner's manual to lock the display and transmit data when instructed by the service agent.

Why it matters

Cooling problems can lead to food spoilage and higher energy use. Catching airflow restrictions, door-seal issues, or defrost problems early can prevent the sealed system from running excessively.

Last updated: January 2026

On the LG LFX25991ST, a leak that shows up at the bottom is most often caused by defrost water not draining correctly (a clogged or frozen defrost drain) or by meltwater/condensation overflowing the drain pan. Clearing the drain path and checking door sealing usually stops the leak.

Quick checks we recommend first

• Look for water under the crisper drawers (often points to a defrost drain issue).
• Check the freezer floor for a thin sheet of ice (common when the drain is frozen).
• Inspect the door gaskets for gaps, tears, or areas not sealing.
• Confirm the refrigerator is level; a forward tilt can encourage water to spill out.
• If the leak is near the dispenser area, check for ice melt or a slow drip from the water line.

Step-by-step: clear a clogged or frozen defrost drain

1. Unplug the refrigerator.
2. Remove food and bins as needed to access the rear interior panel (freezer section is the most common location for the drain trough).
3. Melt any visible ice in the drain trough using warm water (not boiling) and towels.
4. Flush the drain hole with warm water until it flows freely to the drain pan.
5. Reassemble and restore power.

For model-specific access points and panel removal guidance, use the LFX25991ST manual.

Parts that can be involved (when the leak is not just a clog)

If clearing the drain helps only temporarily, these related items are common suspects:

• Cracked or mispositioned drain pan (water spills before it evaporates)
• Door not sealing (excess frost leads to heavy defrost water)
• Ice maker area warming when turned off (ice melts and can drip)
• Internal water line seep (slow leak that tracks to the bottom)

Helpful part examples for this model

Symptom	What to check	Example part on this model
Water appears after heavy frost	Defrost sensing and defrost performance	Refrigerator defrost sensor assembly 6615JB2005R
Leak seems tied to dispenser use	Water line routing and connections	Refrigerator water tubing MJU62070602
Condensation and sweating near doors	Door sealing and alignment	Refrigerator door gasket, right ADX72930461

Why it matters

A recurring bottom leak can lead to ice buildup, poor cooling airflow, and water damage to flooring. Fixing the drain and sealing issues early also helps the compressor and evaporator system run more efficiently.

Last updated: January 2026