LG LFX31945ST/06 refrigerator Parts

For the LG LFX31945ST, the most common customer-reported issue is a cooling failure (fresh food section warm, freezer warming, or both). The most frequent root causes are airflow and sealed-system related problems, plus ice and water system issues that reduce performance over time; see the LFX31945ST owner's manual for model-specific indicators and operating checks.

Most common symptoms we see

• Refrigerator not cooling or temperature swings
• Clicking, buzzing, or repeated start attempts from the compressor area
• Frost buildup on the evaporator cover, weak airflow, or warm spots
• Water leaking inside the refrigerator or pooling under the unit
• Ice maker not making ice or dispenser flow getting slow

What to check first (fast, no tools)

• Confirm the temperature settings and allow 24 hours after any adjustment.
• Make sure air vents are not blocked by food packages.
• Clean dust from the condenser area; restricted airflow causes poor cooling.
• Check door sealing and alignment; a poor seal drives frost and temperature problems.
• If you have a water dispenser, replace the filter on schedule; a clogged filter reduces flow.

Common parts involved (for this model)

Problem area	What it affects	Example part for LFX31945ST
Sealed system	No cooling, clicking, long run times	Refrigerator compressor TCA38091801
Heat rejection	Warm temps, compressor overworking	Refrigerator condenser coil ACG73645004
Defrost sensing	Frost buildup, weak airflow	Refrigerator defrost sensor assembly 6615JB2005R
Water flow	Slow dispenser, small cubes, no ice	LG refrigerator water inlet valve AJU72992603
Filtration	Slow water, taste/odor issues	LG kenmore refrigerator water filter ADQ36006101

Why it matters

Cooling problems can look “random,” but they usually come from one of three things: poor airflow (vents, coils, fans), defrost issues (ice blocking the evaporator), or sealed-system/compressor performance. Catching the pattern early helps prevent food spoilage and reduces strain on major components.

Helpful DIY guidance

• Use our step-by-step tips in how to replace the water filter in an LG refrigerator if your dispenser flow is slow or the ice maker output dropped.
• If the display shows an error, match it to symptoms using LG bottom freezer refrigerator error codes.

You can order replacement parts for your LG LFX31945ST from the parts list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

Yes. With an LG LFX31945ST refrigerator, we can usually replace many common parts ourselves (filters, door gaskets, switches, and some dispenser or ice maker components) using basic hand tools and careful step-by-step work; sealed-system and complex electrical repairs are best handled by a technician.

Good DIY repairs for this model

These are common, practical repairs that typically stay in the DIY range:

• Replace the water filter on schedule (improves taste and flow)
• Fix a warm fridge caused by dirty airflow paths (cleaning and inspection)
• Replace a failed door switch if the lights or fan behavior is wrong
• Replace worn door gaskets if you see gaps, sweating, or frost
• Troubleshoot ice and water issues (filter, valve, dispenser switch)

Helpful model-specific references:

• LFX31945ST owner's manual
• LG kenmore refrigerator water filter ADQ36006101

Repairs to leave to a technician

Some repairs involve refrigerant handling, specialized tools, or advanced diagnostics:

• Compressor or sealed-system work (refrigerant lines, brazing, evacuation)
• Control board diagnosis when symptoms are intermittent or multi-system
• Persistent cooling failures after basic checks (airflow, settings, condenser cleaning)

Examples of higher-complexity parts on this model include the refrigerator compressor TCA38091801 and the refrigerator pcb assembly CSP30021077.

Quick decision guide (DIY vs. pro)

Symptom	Most likely area	DIY-friendly?
Water tastes bad or flow is slow	Filter	Yes
Door not sealing, moisture on gasket	Door gasket	Yes
No ice, dispenser works	Ice maker or fill issue	Often
Fridge warm and freezer warm	Sealed system or airflow	Sometimes
Clicking, won’t cool, runs hot	Compressor/start system	No

Why it matters

Choosing the right repair level protects your food, prevents repeat failures, and avoids replacing expensive parts unnecessarily. Starting with simple checks (filter, door seal, switches, airflow) solves a large share of refrigerator problems.

If you decide to repair, you can order LG LFX31945ST replacement parts from the parts list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

The most commonly replaced parts in a refrigerator are the ones tied to sealing, airflow, defrost sensing, and ice and water dispensing. On the LG LFX31945ST, that often includes door gaskets, the water filter, ice maker components, switches, sensors, and control parts.

Common parts that get replaced most often

On bottom-mount refrigerators like the LG LFX31945ST, we most often see replacements for:

• Door gaskets (seals) that prevent warm air leaks
• Water filter and water inlet valve parts for dispenser and ice maker flow
• Ice maker assembly parts when ice production stops or jams
• Door and dispenser switches that control lights and dispensing
• Defrost and temperature sensors that help prevent frost buildup and warm temps
• Electronic control board and user interface parts when the unit will not respond or cool correctly

Model-matched examples for LG LFX31945ST

These are common replacements available for this model:

Issue you notice	Part type	Example part for this model
Moisture, warm spots, door not sealing	Door gasket	Refrigerator door gasket, left ADX72930460 or refrigerator door gasket, right ADX72930461
Bad taste, slow flow	Water filter	LG kenmore refrigerator water filter ADQ36006101
No ice or inconsistent ice	Ice maker	Refrigerator ice maker assembly AEQ73110205
Light problems, door-open symptoms	Door switch	Refrigerator door switch 6600JB1010A
No water to dispenser or ice maker	Water inlet valve	LG refrigerator water inlet valve AJU72992603

How we narrow it down before ordering

• Inspect gaskets for gaps, tears, or hardened sections
• Replace the filter first for weak water flow, then retest
• Confirm freezer temperature is near 0°F for ice maker complaints
• Check door and dispenser switches for intermittent operation

Why it matters

Replacing high-wear parts early helps prevent temperature swings, frost buildup, and poor ice and water performance.

For diagrams, part locations, and maintenance steps, use the LFX31945ST manual. You can also search by model number on Sears PartsDirect.

Last updated: February 2026