Troubleshooting & Fixes

Air-threading sergers make looper threading effortless — until the thread won't shoot through. Here are the 6 causes behind failed air threading on Viking Amber Air and PFAFF admire air machines, and how to fix each one in minutes.

The motor hums, the light is on — and the needle doesn't move. Nine times out of ten that's a worn or broken motor belt, an $11.95 part you can replace at home. Here's the full diagnosis and step-by-step fix.

A damaged needle plate can cause skipped stitches, fabric feeding issues, and needle breakage. This step-by-step guide shows exactly how to replace it and choose the correct plate for your machine.

A damaged rotary hook can cause skipped stitches, thread shredding, and serious sewing issues. This in-depth guide shows exactly how to diagnose hook damage, what symptoms to look for, and when it’s time to replace the assembly.

The bobbin case plays a critical role in stitch formation, tension control, and overall sewing performance. This in-depth guide explains exactly what a bobbin case does, how it works, and why it matters more than most sewists realize.

A failing bobbin case can cause skipped stitches, thread bunching, and constant frustration. This complete guide breaks down exactly how to identify a bad bobbin case, what symptoms to look for, and when it’s time to replace it.