LG LFX28977ST/01 refrigerator Parts

In an LG LFX28977ST refrigerator, the most commonly replaced parts are the ones that affect sealing, airflow, defrosting, and water dispensing. That typically includes the door gasket, door switch, fan motors, temperature sensors, water inlet valve, and the water filter; shelves and bins are also frequent replacements.

These parts see frequent use or operate constantly, so they are common replacement items:

• Door sealing parts (gaskets) that prevent warm air leaks
• Door switch that controls interior lights and can affect dispenser behavior
• Evaporator and condenser fan motors that move air for cooling
• Temperature sensors (thermistors) that report temperatures to the control board
• Defrost parts that prevent frost buildup (heater and defrost sensor)
• Water system parts (filter, inlet valve, tubing, fittings)

If you are troubleshooting or planning a repair, these are examples of commonly replaced parts available for this model:

Replacing the right part restores proper temperatures, reduces energy use, and prevents secondary problems like ice buildup, water leaks, and food spoilage. The owner's manual also covers care, cleaning, and component replacement guidance (including water filter replacement and troubleshooting).

• Confirm the symptom first (cooling, noise, leaking, dispensing, or door sealing).
• Check for simple causes: doors not closing, blocked vents, or a clogged filter.
• Unplug the refrigerator before inspecting wiring, switches, fans, or sensors.
• Match parts by model number LFX28977ST and the part ID.
• If the issue is intermittent, inspect connectors and harnesses while you have access.

Last updated: February 2026

For an LG LFX28977ST refrigerator, control board replacement typically runs $200 to $600 total: about $150 to $400+ for the electronic control board plus $100 to $250 for professional labor. Your exact cost depends on which board is used and whether wiring or connectors need repair (see the owner's manual).

• Part (control board): $150 to $400+
• Labor (service call + install): $100 to $250
• Optional add-ons: diagnostic fee, wiring repair, or additional parts if a fan motor or sensor issue caused the failure

A “bad board” symptom is often caused by something else (like a door switch, temperature sensor, or fan issue). We recommend these quick checks first:

• Confirm the outlet has power and the cord is firmly seated.
• Look for error codes and match them to likely causes using LG bottom freezer refrigerator error codes.
• Check door operation; a failed switch can cause odd lighting and dispenser behavior (see refrigerator door switch 6600JB1010A).
• Verify cooling airflow; a failed evaporator fan can mimic control problems.
• Inspect for water leaks near wiring and connectors (especially around the dispenser line and valve area).

Replacing the wrong part is the fastest way to turn a $200 repair into a $600+ repair. A quick diagnosis using the manual and error codes helps you confirm whether the electronic control board is actually the failed component.

Last updated: February 2026

For LG refrigerators like the LG LFX28977ST, the most common customer-reported issue is a cooling problem (food not staying cold or temperatures swinging). The most frequent causes are airflow restrictions, a defrost system problem, or a failed cooling fan; the owner's manual troubleshooting section helps narrow it down fast.

• Fridge warm, freezer OK: blocked vents, evaporator fan issue, or a temperature sensor problem
• Freezer warm, fridge warm: sealed system or compressor-related cooling issue, condenser airflow issue
• Frost buildup on back wall or under panels: defrost heater, defrost sensor, or drain/airflow problem
• Clicking, buzzing, or frequent cycling: compressor start components, control board logic, or compressor load
• Ice maker or dispenser issues: water filter restriction, inlet valve problem, frozen water line

1. Confirm controls are set correctly and the unit is not in a defrost cycle (see the owner's manual).
2. Make sure air vents inside the fresh food section are not blocked by food packages.
3. Listen for the evaporator fan; if it is not running when the door is closed, cooling will suffer.
4. Check door closing and sealing; warm air leaks cause temperature swings and frost.
5. If water and ice are slow, replace the filter and purge air from the dispenser.

Cooling complaints often start as a simple airflow or defrost issue; fixing it early prevents heavy frost, warm food temps, and extra compressor run time. Water and ice issues are frequently filter or valve related, and they can look like bigger problems until flow is restored.

• LG bottom freezer refrigerator error codes
• How to replace the water filter in an LG refrigerator

Last updated: February 2026

If you don’t replace the water filter in your LG LFX28977ST refrigerator, water flow to the dispenser and ice maker can drop, and the taste and odor of your drinking water and ice can deteriorate. LG recommends replacing the filter when the indicator reaches 0 or when taste changes noticeably; see the owner's manual.

A filter that’s overdue typically shows up as performance and quality issues:

• Slower water dispensing at the door
• Smaller or hollow ice cubes, or slower ice production
• Water or ice that tastes “off” or smells stale
• Cloudier water (especially right after dispensing)
• Filter indicator showing 0 months remaining (if your model uses that display)

Your refrigerator’s filter is part of the water path feeding the dispenser and ice maker. As it loads with sediment and contaminants, it restricts flow. Low flow can make the ice maker struggle to fill properly and can also make the dispenser feel weak.

LG’s guidance for this model is to replace the filter when:

• The water filter indicator reaches 0, or
• The water or ice cube taste deteriorates noticeably

After replacement, dispense water for 2 minutes to purge air and flush the system, then check for leaks. You can also reset the filter indicator by pressing and holding the LIGHT/FILTER button for more than 3 seconds.

• Replace the filter on schedule (or sooner if water quality is poor)
• Purge air after any filter change
• If ice production is low, use Ice Plus for a short boost (it runs colder for 24 hours)
• If flow stays weak after a new filter, inspect the supply line and valve

For step-by-step help, use how to replace the water filter in an LG refrigerator.

Last updated: February 2026