LG LSC27921ST/03 refrigerator Parts

Most LG refrigerators, including the LG LSC27921ST side-by-side, typically last 10 to 15 years with normal household use and routine maintenance. Many units run longer when the condenser area stays clean, door seals stay tight, and the water system is maintained per the LSC27921ST owner's manual.

A refrigerator’s life is usually determined by heat management, airflow, and how hard the sealed system has to work.

• Keep condenser coils and the condenser fan area clean to reduce compressor run time
• Make sure doors close fully and gaskets seal all the way around
• Avoid overpacking; blocked vents cause warm spots and longer run times
• Keep temperatures steady (frequent door opening and hot food loads shorten life)
• Maintain the water system (filter changes help protect valves and reduce restrictions)

These intervals fit most LG side-by-side refrigerators.

If you need the correct filter for this model, the LG lt500p refrigerator water filter ADQ72910911 is a common maintenance item for the LSC27921ST.

These symptoms often show up in the last few years of service life.

• Temperatures drift even after cleaning and adjusting controls
• Compressor runs almost constantly or cycles very rapidly
• Excess frost buildup or recurring water puddles
• Louder-than-normal fan noise or intermittent cooling
• Repeated repairs for cooling or defrost problems

A well-maintained refrigerator holds safe food temperatures with less run time. That lowers wear on the sealed system (compressor, condenser, evaporator) and helps you get the full expected lifespan from your LG LSC27921ST.

Last updated: February 2026

For the LG LSC27921ST refrigerator, the most common day-to-day problem we see is cooling performance complaints: temperatures running warm, uneven cooling, or moisture buildup. In many cases, the cause is airflow, dirty condenser coils, door sealing issues, or normal operating conditions described in the LSC27921ST owner's manual.

• Fresh food section too warm while freezer seems OK
• Freezer temperature creeping up or ice cream soft
• Interior moisture or condensation
• Compressor seems to run “too much”
• Unusual but normal sounds (pulsing, gurgling, popping, fan noise)

1. Door closure and gaskets: Make sure doors fully close and gaskets are clean.
2. Condenser coils: Dirty coils commonly cause long run times and warm temps.
3. Air vents: Do not block vents between freezer and refrigerator sections.
4. Recent changes: Large grocery load or frequent door openings can warm temps temporarily.
5. Room conditions: Hot or humid rooms increase run time and moisture.

If cooling seems OK but the dispenser is slow or ice production drops, start with the water filter. For this model, a common replacement is the LG lt500p refrigerator water filter ADQ72910911. We also recommend following the steps in how to replace the water filter in an LG refrigerator to flush air and restore flow.

Cooling and airflow issues can mimic bigger failures. Checking coils, vents, and door sealing first prevents food spoilage, reduces compressor run time, and often fixes the problem without major disassembly.

Last updated: February 2026

The LG LSC27921ST side-by-side refrigerator measures about 38 1/2 inches wide x 72 inches high x 37 1/2 inches deep. For the most accurate measurement for your exact installation (including door swing and clearance), we recommend confirming the specs in the LSC27921ST owner's manual.

We use these checks to avoid delivery and fit problems with side-by-side refrigerators:

• Doorway width and turns (hallways, tight corners, stair landings)
• Depth with doors and handles (handles often add noticeable depth)
• Clearance for door swing (so bins and drawers can open fully)
• Space behind the cabinet for the power cord and water line
• Floor leveling range (front leveling legs affect door alignment)

Even when the cabinet dimensions fit, tight clearances can cause issues like doors that cannot open fully, kinked water lines to the ice maker, or difficulty removing the doors during a move. The manual also covers safe door removal steps for narrow openings.

If you are installing or reconnecting the water supply, the manual includes guidance on shutoff valve placement and water line connection details. If you are also replacing the filter, our how to replace the water filter in an LG refrigerator guide helps you match the correct filter style and complete the changeout cleanly.

Last updated: February 2026

For your LG LSC27921ST refrigerator, the fastest way to find the correct LG part number is to match the model number from the rating label to the parts list and diagrams in the LSC27921ST owner's manual. Once you identify the part name and location, you can confirm the exact part number and order the correct replacement.

• Model number: Check the refrigerator’s rating label (commonly inside the fresh food section near the door opening).
• Parts breakdown: Use the exploded-view diagrams and parts list tied to LSC27921ST.
• Part label (when accessible): Many components (valves, motors, sensors) have a sticker with a manufacturer part number.
• Consumables: Filters and some service items are often listed directly in the manual.

The LSC27921ST manual calls out the replacement water filter cartridge as 5231JA2002A (also referenced as ADQ72910901 in the manual text). If you are replacing the filter using our model-specific parts list, the matching item is LG lt500p refrigerator water filter ADQ72910911.

The manual procedure is to flush the system by dispensing about 2.5 gallons of water in cycles (30 seconds on, 60 seconds off) and then check for leaks.

LG often uses similar-looking parts across multiple refrigerator series; matching the exact model number and then the exact part number prevents fit issues, leaks (water system parts), and repeat repairs.

Last updated: February 2026