What is AQL in washing machine inspection?

AQL (Acceptable Quality Limit) per ISO 2859-1 sets how many defects are tolerated per sample size. Typical: critical defects AQL 0, major 2.5, minor 4.0. Agree the levels before production starts.

Which tests are non-negotiable before shipment?

Electrical safety (hi-pot, leakage current, grounding) and a full wash-cycle function run on every sampled unit. Everything else is important; these two are mandatory.

What happens if pre-shipment inspection fails?

Safety failures stop the lot entirely. Other failures trigger rework or sorting followed by re-inspection. Every failure needs a written corrective action with photos.

Should I use a third-party inspector?

For first orders or new factories, yes. For established relationships with a clean record, many buyers alternate between third-party and factory self-inspection with random verification.

Buyer Guide

How to QC a Washing Machine Before Shipment: The Pre-Shipment Checklist

Pre-shipment QC for washing machines: AQL sampling, the tests that matter, and how to handle failures.

Pre-shipment inspection is your last chance to catch problems before they cross the ocean. Here is what a proper inspection covers.

Free one-page PDF: Pre-Shipment QC Checklist

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Sampling: how many units

Use AQL sampling (ISO 2859-1): the sample size follows the lot size, not your gut feeling.
Typical: General Inspection Level II; critical defects AQL 0, major 2.5, minor 4.0 — agree the levels in writing before production.
Samples must be pulled randomly from finished, packed cartons — not hand-picked by the factory.

The tests that matter

Electrical safety: hi-pot, leakage current, grounding continuity — non-negotiable.
Function run: full wash cycle on each sampled unit; listen for abnormal noise and vibration.
Water fill/drain timing and level accuracy.
Appearance: cabinet color consistency, silkscreen alignment, lid fit.
Packaging: drop test on sample cartons, label and manual correctness.

When inspection fails

Critical defect (safety): the lot stops. Root cause, corrective action, re-inspection — no exceptions.
Major defects over AQL: negotiate rework or sorting; re-inspect the reworked lot.
Get every failure and corrective action in a written report with photos.
Honest note: a factory that argues with your inspector instead of fixing the problem is telling you about every future shipment too.

Key takeaways

AQL sampling, random pulls from packed cartons.
Electrical safety + full-cycle run are non-negotiable.
Safety failures stop the lot — no exceptions.

Quality Manufacturing

Questions, answered

Frequently Asked Questions

Straight answers for washing machine buyers.

For guidance purposes only. This guide shares general industry knowledge for washing machine buyers. Factory capabilities, certifications, and terms vary by order and should be confirmed in writing before purchase. Nothing here is a guarantee of pricing, lead time, or certification outcomes.

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