LG LRFC21755TT/00 refrigerator Parts

On the LG LRFC21755TT, ice building up on the freezer floor is typically caused by a defrost drain problem: meltwater cannot flow to the drain pan, so it refreezes at the bottom. Clearing the drain path and fully defrosting the freezer usually stops the repeat icing (see the LRFC21755TT owner's manual).

What’s happening (and why it ices at the bottom)

During normal defrost cycles, frost melts and should drain away. If the drain is restricted, water pools under the evaporator area and freezes into a sheet of ice on the freezer floor.

Common causes

• Ice or debris blocking the defrost drain opening
• Drain tube restricted or out of position
• Door left open or not sealing well, letting humid air in (creates excess frost)
• Heavy door openings that add moisture to the freezer

Fix steps we recommend

1. Unplug the refrigerator before working inside panels or near wiring.
2. Remove food and drawers, then manually defrost the freezer until the ice sheet melts.
3. Locate the drain opening (usually beneath the evaporator cover area) and flush it with warm water.
4. Check the drain tube for kinks, ice, or buildup; replace it if it is damaged.
5. Confirm the doors close fully and nothing is holding them open.

If the drain tube is cracked, loose, or repeatedly clogs, replacing the drain tube is a reliable repair: refrigerator drain tube 5251JA3003D.

Quick symptom-to-cause guide

Symptom	Most likely cause	What to do first
Ice sheet only on freezer floor	Drain restriction	Defrost and flush drain
Frost everywhere plus bottom ice	Door left open or seal issue	Check door closure and gasket
Water puddles then freezes again in 1 to 3 days	Drain tube still restricted	Inspect/replace drain tube

Why it matters

Bottom-of-freezer icing can block airflow and reduce cooling performance. It can also force the refrigerator to run longer, which increases noise and energy use and can lead to water leaks when the ice melts.

Helpful DIY guidance

• How to get rid of refrigerator puddles

You can order model-specific replacement parts for LRFC21755TT from the parts list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

Cooling problems are the most common issue we see with LG refrigerators like model LRFC21755TT. Symptoms usually show up as warm temperatures in the fresh food section or freezer, longer run times, and sometimes unusual compressor-area noise; the troubleshooting steps in the owner's manual help you narrow down the cause.

What “cooling problem” usually means

Cooling complaints typically trace back to one of these conditions:

• Dirty condenser coils causing poor heat release and longer run times
• Doors not sealing or not closing fully, letting warm air leak in
• Airflow problems inside the cabinet (blocked vents, overpacked shelves)
• Defrost system issues that allow frost to restrict airflow
• Fan or sealed-system problems (less common, but more severe)

Quick checks we recommend first (no parts needed)

Start with the basics before replacing anything:

• Confirm the temperature settings are appropriate for your kitchen conditions
• Make sure doors close completely and gaskets are clean
• Clean the condenser coils (the manual calls this out as routine maintenance)
• Reduce frequent door openings and avoid loading large amounts of warm food at once
• Listen for the evaporator fan; if it is not running, cooling will suffer

Common symptoms and what they point to

Symptom	Most likely category	What to do next
Fridge warm, freezer OK	Airflow from freezer to fridge restricted	Check vents, frost buildup, fan operation
Both sections warm	Condenser airflow, compressor, or sealed system	Clean coils; verify fans; then diagnose sealed system
Frost buildup in freezer	Defrost system or door seal issue	Inspect for ice blocking vents; check defrost components
Runs “all the time”	Dirty coils, warm room, frequent openings	Clean coils; reduce openings; recheck temps

Parts that often relate to cooling and airflow symptoms

If your diagnosis points to a specific failure, these model-matched parts are commonly involved:

• Refrigerator evaporator fan motor 4681JB1029H (no airflow across the evaporator)
• LG refrigerator defrost heater 5300JK1005D (heavy frost, restricted airflow)
• Refrigerator compressor TCA35931726 (loss of cooling tied to sealed-system performance)

Why it matters

A refrigerator that cannot maintain stable temperatures can spoil food quickly and forces the compressor to run longer than normal. Keeping coils clean and airflow unobstructed is the fastest way to prevent many “not cold enough” complaints.

You can also order model-specific replacement parts from the parts list for LRFC21755TT, or search by model number on Sears PartsDirect.

Last updated: February 2026

In an LG bottom-mount refrigerator like model LRFC21755TT, the most commonly replaced parts are the ones that wear out from daily use or get affected by airflow, frost, and water supply issues: filters, door switches, fan components, defrost parts, and water valves. Use the LRFC21755TT owner's manual to match symptoms to the right section and procedure.

Most common replacement parts (and what they affect)

• Water and ice system: water inlet valve, water tubing, ice maker
• Cooling airflow: evaporator fan motor and fan blade
• Defrost and drainage: defrost heater, drain tube
• Door and light functions: door switch, door stop, hinges
• Major cooling system (less frequent): compressor and start components

Model-matched examples you can order for LRFC21755TT

These are examples of commonly replaced items that are available for this model.

Symptom you notice	Part that often fixes it	Example part for this model
No ice or weak water flow	Water inlet valve	Refrigerator water inlet valve 5220JB2010A
Warm fridge, noisy, or poor airflow	Evaporator fan motor or blade	Refrigerator evaporator fan motor 4681JB1029H and refrigerator evaporator fan blade 5901JA1021A
Water pooling or leaking	Drain tube	Refrigerator drain tube 5251JA3003D
Frost buildup, warming, defrost issues	Defrost heater	LG refrigerator defrost heater 5300JK1005D
Light stays off or door alarm issues	Door switch	LG refrigerator door switch 6600JB1010A

Quick checks before you buy a part

• Unplug the refrigerator before inspection or repair (the manual calls this out for safety).
• Confirm doors close fully and seals are making contact all the way around.
• Clean condenser coils if the unit seems to run too much (dirty coils increase run time).
• For water and ice issues, verify the shutoff valve is fully open and the supply line is not kinked.
• For fan noise, check for ice buildup or packaging blocking vents.

Why it matters

Replacing the correct wear part restores temperature stability, reduces excessive run time, and prevents secondary problems like odors, puddles, and frost. For example, a restricted water valve can stop ice production, while a failing evaporator fan can cause warm spots and poor air circulation.

To shop beyond the parts listed here, search your model number on Sears PartsDirect.

Last updated: February 2026

Yes. On the LG LRFC21755TT refrigerator, we can replace many user-serviceable parts ourselves (handles, light bulb, some water and ice components) as long as we unplug power first and follow the safety steps in the LRFC21755TT owner's manual. Sealed-system and refrigerant repairs should be handled by a qualified technician.

What you can usually replace yourself

These repairs are typically straightforward with basic hand tools and careful handling:

• Door and freezer drawer handles (the manual shows the keyhole-slot style removal and installation)
• Interior light bulb (use the same size, shape, and wattage)
• Door switch (if the light stays off or the fan behavior changes when the door opens)
• Ice maker assembly (common fix for no ice or misshapen cubes)
• Water inlet valve and water tubing (common for no water dispensing or slow fill)

Repairs that are not good DIY candidates

Some work involves electrical and refrigerant hazards or specialized tools:

• Sealed cooling system work (compressor, refrigerant lines, filter dryer)
• Diagnosing control-board failures when symptoms overlap (cooling, defrost, fan, and sensor issues)
• Any repair requiring opening the refrigerant circuit

Safety steps we follow before any repair

The manual’s safety guidance is clear: disconnect power before cleaning or repairs.

• Unplug the refrigerator (do not pull on the cord; pull the plug)
• Turn off the water supply if working on the dispenser or ice maker
• Protect floors and hands; door and drawer edges can pinch
• Use the correct replacement part for LRFC21755TT
• Restore power and confirm operation (lights, fans, ice maker fill, temperatures)

Common DIY parts for this model (examples)

Symptom	Likely area	Example part on this page
No ice or poor ice harvest	Ice maker	Refrigerator ice maker 5989JA0002Y
No water or slow fill	Water valve	Refrigerator water inlet valve 5220JB2010A
Warm fridge, noisy airflow	Evaporator fan	Refrigerator evaporator fan motor 4681JB1029H
Frost buildup, warm temps	Defrost system	LG refrigerator defrost heater 5300JK1005D

Why it matters

DIY-friendly repairs can restore cooling, lighting, and water/ice performance quickly and cost-effectively. Knowing where to draw the line (sealed-system work) helps prevent injury and avoids turning a simple refrigerator repair into a bigger problem.

Last updated: February 2026

On the LG LRFC21755TT bottom-mount refrigerator, the most common “problem” is not the freezer being on the bottom; it is airflow restrictions, incorrect temperature control settings, or doors not sealing fully. Those issues cause warm temperatures, moisture, and longer compressor run times. Use the LRFC21755TT owner's manual for the recommended settings and airflow guidance.

Common symptoms and what they point to

• Refrigerator or freezer too warm: vents blocked, doors opened often, or controls need adjustment.
• Interior moisture or condensation: humid air entering from frequent openings or doors not closing completely.
• Door hard to open right after closing: normal vacuum effect; wait about 5 minutes for pressure to equalize.
• Weak cooling after delivery or moving: unit needs a few hours running time before loading food.
• Long run times: often caused by warm food loads, poor circulation, or settings turned too cold.

Quick checks we recommend first (no tools)

• Keep food packages away from vents between the freezer and fresh food sections.
• Start at 37°F (3°C) for refrigerator and 0°F (-18°C) for freezer; wait 24 hours before judging.
• Push both fresh food doors fully closed; this design does not self-close.
• After any adjustment, wait 24 hours between changes.

What to adjust first

Situation	Adjust first	Why
Fresh food too warm	Refrigerator control	It acts as the thermostat for the whole unit
Freezer too warm after fresh food is correct	Freezer control	It shifts cold airflow balance between sections
Temps swing after a big grocery load	No change for 24 hours	The system needs recovery time

Why it matters

This LG design depends on steady circulation (Multi-Flow) between compartments. Blocked vents or poor door sealing reduces airflow, raises temperatures, and forces the compressor to run longer.

When a part is a likely cause

If temperatures stay warm after the checks above, airflow parts can be involved. A damaged fan blade reduces circulation; see the refrigerator evaporator fan blade 5901JA1021A. You can order model-matched parts from the parts list for LRFC21755TT, or search by model on Sears PartsDirect.

Last updated: February 2026