Restore the cooling capacity of your unit with the LG Air Conditioner First Evaporator - 5421A20256A. The evaporator coil is a fundamental component of the refrigeration cycle, responsible for absorbing heat from the indoor air as refrigerant evaporates within its tubing. If your air conditioner is running but failing to lower the room temperature, or if you notice ice buildup and refrigerant leaks on the coils, replacing the evaporator is essential for efficient heat exchange and moisture removal.

The 5421A20256A is precision-crafted with high-thermal-conductivity aluminum fins and durable copper tubing. Its design maximizes surface area contact with the air, ensuring rapid cooling and effective dehumidification. The coil is also treated to resist corrosion, helping to prevent the "pitting" that often leads to refrigerant gas leaks over time.

1. Safety Warning: This procedure involves the sealed refrigerant system. Installation should be performed by a licensed HVAC professional to ensure compliance with environmental regulations and safety standards.
2. Refrigerant Recovery: Before beginning, all refrigerant must be professionally recovered from the system. Never vent refrigerant into the atmosphere.
3. Disassemble Indoor Unit: Remove the front panel, filters, and the drain pan to gain clear access to the evaporator assembly.
4. Disconnect Lines: Carefully de-braze the suction and liquid lines connected to the old evaporator coil. Remove any mounting screws or brackets holding the coil in place.
5. Install New Coil: Slide the new 5421A20256A evaporator into the chassis. Braze the refrigerant lines to the new coil using appropriate alloy rods and a torch, ensuring leak-proof joints.
6. Pressure Test and Vacuum: Perform a dry nitrogen pressure test to check for leaks. Once confirmed, use a vacuum pump to remove air and moisture from the lines before recharging the system with the specified weight of refrigerant.
7. Compatible with select LG air conditioner models, this OEM-quality evaporator coil restores the crisp, cold airflow your system provided when it was new.

1. AC Evaporator Coil – part number 5421A20256A
2. High-Efficiency Heat Absorption – Restores the unit's ability to cool indoor spaces rapidly
3. Advanced Dehumidification – Effectively removes moisture from the air for improved comfort
4. Corrosion-Resistant Design – Built to withstand humidity and prevent refrigerant leaks
5. Optimized Airflow – Precision fin spacing ensures maximum contact and thermal transfer
6. OEM-Quality Replacement – Guaranteed to meet LG's strict performance and durability specifications