LG LFX25980ST/00 refrigerator Parts

On our LG LFX25980ST refrigerator, DHF (often shown as “DH F”) indicates a defrost heating failure. The refrigerator is not completing the defrost cycle, so frost can build up on the evaporator and restrict airflow, which leads to warm temperatures and poor cooling.

What you should do first

• Power reset: Unplug the refrigerator (or turn off the breaker) for 5 minutes, then restore power.
• Check for airflow symptoms: weak airflow from vents, warmer fresh food section, or frost on the back wall inside.
• Listen for fan operation: the evaporator fan should run during cooling; unusual noise can point to ice buildup.
• Inspect door sealing: a leaking gasket lets humid air in and increases frost.
• Confirm settings: make sure the freezer and refrigerator temps are set to normal ranges.

Common causes of a DHF/“DH F” defrost error

In this LG bottom-mount design, DHF is usually tied to the defrost system not melting frost off the evaporator.

Likely cause	What you may notice	What typically fixes it
Heavy frost on evaporator	Warm fridge, fan noise, reduced airflow	Manual defrost and correct root cause
Failed defrost heater	Persistent DHF, recurring frost	Replace heater (model-specific part)
Evaporator fan issue	Warm temps, little airflow	Diagnose fan motor and blade
Control/defrost sensing issue	Error returns quickly after reset	Electrical diagnosis, possible board repair

Parts that commonly relate to DHF symptoms on this model

If troubleshooting points to airflow or defrost problems, these model-listed parts are common suspects:

• LG refrigerator defrost heater 5300JK1005D (defrost heat source)
• Refrigerator evaporator fan motor 4681JB1027C (moves cold air through compartments)
• Refrigerator evaporator fan blade 5901JA1021A (fan airflow performance)

Why it matters

A defrost failure can quickly turn into a cooling failure because ice blocks the evaporator coil and air passages. Fixing DHF early helps protect food temperatures and reduces strain on the compressor.

For model-specific function details and troubleshooting steps, use the LFX25980ST manual.

Last updated: January 2026

For the LG LFX25980ST refrigerator, the most common customer-reported issue is a cooling problem (refrigerator or freezer not staying cold). In many cases, the root cause is airflow or defrost-related (ice buildup restricting airflow) or a fan problem, not a simple control setting; use the LFX25980ST owner’s manual troubleshooting section to narrow it down.

What to check first (fast, no tools)

• Confirm the temperature settings were not accidentally changed.
• Make sure the doors fully close and the gaskets seal all the way around.
• Listen for the evaporator fan running when the doors are closed (a steady fan sound).
• Look for frost buildup on the back wall inside the freezer (a common sign of a defrost issue).
• Verify vents are not blocked by food packages.

Common causes of “not cooling” on this model

Cooling complaints usually trace back to one of these areas:

Symptom you notice	Most likely area	Example part that can be involved
Freezer cold, fresh food warm	Airflow from freezer to refrigerator restricted	Refrigerator evaporator fan motor 4681JB1027C
Frost/ice on freezer back panel	Defrost system not clearing ice	LG refrigerator defrost heater 5300JK1005D
Warm temps plus unusual clicking/humming patterns	Sealed system or compressor-side issue	Refrigerator compressor TCA37091209
Lights do not respond correctly when door opens/closes	Door switch or door not registering closed	Refrigerator door switch 6600JB1010A

Why it matters

When airflow is restricted (often by frost), the freezer can look “okay” while the refrigerator section warms up. Catching it early helps prevent food spoilage and reduces strain on the compressor.

Helpful next steps

• Follow the “Before calling for service” checklist in the LFX25980ST owner’s manual.
• If you see frost buildup, focus on defrost components and airflow.
• If you suspect a fan issue, use our guide: how to fix your evaporator cooling fan.
• If you’re seeing an error code, use: LG bottom freezer refrigerator error codes.

Last updated: January 2026

A typical LG refrigerator lasts 12 to 15 years with normal household use and basic maintenance. Your LG LFX25980ST is a larger bottom-mount model (not a 185 L unit), but the same lifespan range applies; use the care schedule in the LFX25980ST manual to help it reach full service life.

Typical lifespan for LG refrigerators

Most modern refrigerators, including LG bottom-mount and French door styles, deliver reliable service for about 12 to 15 years when airflow stays clear and temperatures stay stable.

• 12 to 15 years: typical service life for a household refrigerator
• Longer life: consistent cleaning, good door sealing, and steady power
• Shorter life: restricted airflow, frequent warm-ups, or neglected seals

What most often shortens fridge life

These are the biggest wear drivers on the compressor and cooling system:

• Dirty condenser area that traps heat
• Door gasket leaks that let warm, moist air in
• Overpacked compartments blocking vents
• Repeated long door openings (temperature swings)
• Ignoring early symptoms like unusual noise or warming

Maintenance that extends lifespan (high impact)

Use these habits to reduce strain and prevent common failures:

• Keep interior air vents unobstructed so cold air circulates
• Confirm doors close fully and sit level to protect the gasket seal
• Clean spills and food residue so odors and moisture do not build up
• Replace the water filter on schedule if your unit uses one (example: refrigerator water filter 5231JA2006A)
• Address puddles quickly; a clogged drain can lead to icing and airflow problems

“Replace it” vs. “repair it” guide

What you notice	Common cause	Typical next step
Fridge warm, freezer still cold	Airflow issue	Check evaporator fan, vents, frost buildup
Frost buildup and weak cooling	Defrost problem	Inspect defrost heater and defrost circuit
Lights or alarms act inconsistent	Door not sensed closed	Test door switch, check alignment

Why it matters

A refrigerator usually fails early because it runs hot or runs too long. Keeping seals tight, airflow open, and filters fresh reduces compressor run time and helps your LG refrigerator reach its normal lifespan.

Last updated: January 2026