ASUS PROART LC 420, High Performance, AIO Liquid CPU Cooler with Minimalist Design and Noctua NF-A14 PWM Radiator Fans, Black

The ASUS ProArt LC 420 is designed for creators and professionals who prioritize stability and silence. Because it is part of the ProArt ecosystem—which targets workstation-grade reliability—the warranty is structured to provide peace of mind during long rendering sessions and heavy creative workloads.

Warranty Period: 6 Years

Like its ROG and TUF counterparts, the ProArt LC 420 comes with a 6-year limited warranty. This is particularly notable because it covers the high-end Noctua NF-A14 industrialPPC-2000 PWM fans, which are world-renowned for their longevity and are a core part of this product’s value proposition.

What is Covered?

ASUS warrants that the product is free from defects in materials and workmanship. Specifically for the ProArt LC 420, this includes:

• The Pump & Motor: Coverage for the high-performance three-phase motor designed for the massive 420mm radiator.

• Noctua NF-A14 Fans: These specific fans are covered under the AIO warranty for motor failure or bearing issues.

• Illuminated Meter: The minimalist LED status indicator on the pump cover (which displays real-time system load, temperatures, or fan speeds) is protected against LED failure or controller errors.

• The Cooling Loop: Protection against manufacturing defects in the 450mm reinforced sleeved tubing and the extra-thick 420mm radiator.

ProArt Specific Conditions

Because this cooler is marketed toward professionals, there are specific nuances to its support:

• Continuous Operation: The ProArt line is built to handle “professional” use cases, meaning it is rated for longer uptimes than standard consumer hardware. However, it is still categorized as a Consumer Product; use in extreme industrial environments or server farms may affect warranty eligibility.

• Aesthetic Integrity: The “Minimalist Design” features a specific NCVM-coated pump cover. The warranty covers manufacturing defects in this coating (like spontaneous peeling) but does not cover scratches or discoloration caused by cleaning chemicals or abrasive cloths.

Exclusions and Voiding the Warranty

The warranty will be considered void if:

1. Unauthorized Servicing: You attempt to replace the coolant or open the pump block.

2. Improper Mounting: The ProArt LC 420 is a massive unit. Damage caused by forcing the 420mm radiator into a case that does not officially support it (leading to bent frames or punctured fins) is not covered.

3. Third-Party Parts: Using non-Noctua fans that draw higher amperage than the headers are rated for, resulting in a blown internal fan controller, may complicate your claim.

4. Negligence: Damage from “leaking” is only covered if the leak originates from a factory defect. Damage caused by kinking the tubes beyond their natural flexibility radius is excluded.

Claiming Your Warranty

1. Validation: Keep your dated sales receipt. ASUS calculates the warranty from the date of purchase. If no receipt is available, ASUS uses the manufacturing date (derived from the serial number), which may result in a shorter effective coverage period.

2. Serial Number Location: The SN is typically located on a sticker on the side of the radiator. Do not remove this sticker, as it is required for all RMA requests.

3. RMA Process: Contact ASUS Support via the ProArt premium support line (where available). You will typically be required to ship the entire unit—radiator, fans, and pump—to an authorized service center for inspection.

4. Software Troubleshooting: Before sending the unit in, ASUS will likely ask you to verify that the ProArt Creator Hub software is up to date, as this controls the lighting and monitoring features.