Owner’s manual
Error Codes
Why does my LG freezer keep icing up at the bottom?
On the LG LMXC23746D, ice building up on the freezer floor is most often caused by a defrost drain that is partially or fully blocked; defrost water cannot flow to the drain pan, so it refreezes at the bottom. Use the steps in the LMXC23746D manual to safely access and clear the drain area.
What to check first (quick triage)
- Unplug the refrigerator before removing freezer drawers or panels.
- Look for a solid “sheet” of ice on the freezer floor (classic drain issue).
- Check for water dripping into the freezer after a defrost cycle.
- Make sure food packages are not blocking rear vents or the drain trough.
- Confirm the freezer door closes fully and the gasket seals all the way around.
How we fix bottom ice buildup
- Manually defrost the freezer floor: Remove food, drawers, and let the ice melt (towels help). Do not chip ice with sharp tools.
- Clear the drain path: Once the ice is melted, flush the drain opening with warm water (a turkey baster works well) until it flows freely.
- Check the drain tube and drain pan: If the tube is restricted or damaged, replacing the drain tube assembly is a common repair on bottom-mount designs.
If you suspect the drain tube is the issue on this model, use the compatible refrigerator drain tube assembly 5251JA3004E.
Common causes and what they look like
| Symptom in freezer | Most likely cause | Typical fix |
|---|---|---|
| Ice sheet on bottom | Clogged defrost drain | Defrost and flush drain |
| Water then ice after defrost | Drain tube restricted | Clear or replace drain tube |
| Frost plus poor cooling | Airflow issue or defrost system problem | Check vents, then defrost components |
Why it matters
When the drain can’t move water to the drain pan, the freezer repeatedly refreezes that water. Over time, the ice can interfere with airflow, cause temperature swings, and lead to leaks when it finally melts.
Last updated: January 2026
Does an LG refrigerator have a filter for the ice maker?
Yes. On the LG LMXC23746D, the ice maker is supplied by the refrigerator’s water system, so the same refrigerator water filter that filters dispenser water also filters the water used to make ice (there typically is not a separate “ice maker-only” filter). See the LMXC23746D manual for your filter location and replacement notes.
How filtration works for the ice maker
In most LG bottom-mount and French door designs like the LMXC23746D, water flows in this order:
- Home water supply line
- Water inlet valve
- Refrigerator water filter
- Dispenser and ice maker fill circuit
That means improving ice taste and reducing sediment is mainly about keeping the main filter current.
What to replace on this model
For the LMXC23746D, the compatible refrigerator water filter listed for this model is the LG refrigerator water filter ADQ73613401.
Quick comparison
| Item | What it filters | Where it helps most |
|---|---|---|
| Refrigerator water filter | Water for ice maker and water dispenser | Ice taste/clarity, dispenser taste |
| Refrigerator air filter | Air inside the fresh food compartment | Odors from foods (not water/ice) |
If you are chasing odor issues (not water quality), the LG refrigerator air filter ADQ73214408 is the separate part that targets food odors.
Best practices after changing the filter
- Dispense and discard several glasses of water to flush carbon fines.
- Dump the first 1 to 2 batches of ice after a filter change.
- If ice is hollow or small, purge air and confirm strong water flow at the dispenser.
- Replace the filter on schedule to prevent slow fill and off-taste.
Why it matters
A fresh water filter protects the ice maker fill circuit from sediment and helps keep ice tasting clean. A clogged filter can also reduce water flow, which can lead to slow ice production.
Last updated: January 2026
What does DH F mean on LG refrigerator?
On the LG LMXC23746D refrigerator, the DH F code indicates the refrigerator is detecting a defrost heating failure (the defrost cycle is not melting frost as expected). When defrost heat fails, ice can build up on the evaporator and restrict airflow, causing poor cooling.
What to do first (safe, quick checks)
- 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/ice on the back freezer panel.
- Make sure doors close and seal fully; warm air leaks can accelerate frost buildup.
- Confirm vents are not blocked by food packages.
- If you see heavy frost, move food to a cooler and allow a manual defrost (doors open) to temporarily restore airflow.
Parts commonly involved in a DH F condition
A DH F condition is usually tied to the defrost system (heater, sensors, wiring, or control). For this model’s parts list, a common component to check or replace is the defrost heater.
Quick symptom-to-part guide
| What you notice | What it often points to | Example part to check |
|---|---|---|
| Heavy frost on evaporator cover, weak airflow | Defrost heat not working | Defrost heater assembly |
| Cooling gets worse over days, then improves after manual defrost | Defrost system issue | Heater, sensor, control |
| DH F returns soon after reset | Component failure likely | Heater or control circuit |
Where to find model-specific guidance
For control panel behavior, error code handling, and any model-specific reset steps, use the LMXC23746D manual.
Why it matters
Defrost problems are not just an “ice issue”; they can choke airflow across the evaporator, making the compressor run longer and causing temperature swings in both the freezer and fresh food sections.
Last updated: January 2026
Why is my LG bottom freezer not working?
If your LG LMXC23746D bottom-mount refrigerator has power but the bottom freezer is warm, the most common causes are an airflow problem (evaporator fan or heavy frost/ice buildup), a sealed-system/compressor problem, or a control/sensor issue. Use the LMXC23746D manual to confirm control settings and any displayed error codes.
Quick checks we recommend first
- Make sure the freezer temperature is set correctly and not in a demo/showroom mode (if equipped).
- Confirm the freezer drawer is closing fully and the door gaskets are sealing.
- Listen for the evaporator fan in the freezer; you should typically hear airflow when the unit is running.
- Check for heavy frost on the freezer back wall (often points to a defrost problem).
- Verify the condenser area is not packed with dust and the unit has airflow behind it.
What the symptoms usually mean
| What you notice | Most likely area | What to check next |
|---|---|---|
| Lights on, fans run, but no cooling anywhere | Compressor/start components or sealed system | Compressor sound, clicking, warm compressor compartment |
| Fridge warm and freezer warm, compressor clicks on/off | Start device/overload or compressor | Inspect start components and wiring |
| Freezer frosts up, then warms over time | Defrost system | Frost pattern, defrost heater circuit |
| Freezer not cold enough but fridge seems closer to normal | Freezer airflow/fan | Fan operation, ice blocking vents |
Parts that commonly relate to “freezer not working” on this model
If troubleshooting points to a specific component, these are common matches for this model’s parts list:
- Refrigerator compressor TCA38091801: drives the sealed cooling system; failure can cause no cooling.
- Refrigerator condenser fan motor assembly EAU62025701: moves air across the condenser; if not running, cooling performance drops.
- Refrigerator evaporator fan motor EAU61524007: circulates cold air through the freezer and into the fresh food section.
- Refrigerator defrost heater assembly MEE62805303: helps prevent ice buildup that can block airflow.
- Refrigerator temperature sensor 6500JB2002E: feeds temperature data to the control system.
Why it matters
A warm bottom freezer can quickly lead to food spoilage, and continued operation with poor airflow (ice buildup or a stalled fan) can make the compressor run longer and strain the cooling system.
Last updated: January 2026
