Most shrink wrap machine problems trace back to one of a handful of causes: temperature, speed, film, or a worn part. Before you assume you need a new machine, run through these common issues — there's a good chance the fix is simpler than you think.
1. Film Isn't Sealing Cleanly
A weak or inconsistent seal is usually a sealer bar issue — either the temperature is too low, the bar is worn, or the film is sitting too long before sealing. Check your sealer bar for wear first; a worn or pitted bar won't hold consistent heat across the full seal length.
2. Film Shrinks Unevenly
Uneven shrinking is almost always a tunnel issue: either the heat isn't distributed evenly across the tunnel width, or the conveyor is moving too fast for the film to fully shrink before exiting. Slow the conveyor speed slightly before assuming the tunnel itself needs repair.
3. Film Tears or Punctures During Shrinking
This is often a gauge mismatch — the film is too thin for the product's edges or weight. Sharp corners and heavier items need a thicker, more puncture-resistant film. Our film selection guide can help you match gauge to product.
4. Machine Runs Hot or Won't Hold Temperature
Inconsistent temperature is frequently caused by a failing heating element or a miscalibrated thermostat, both of which are common wear parts on high-use machines. Check our popular replacement parts to see if the part you need is a quick swap.
5. Machine Jams or Feeds Film Incorrectly
Film jams are usually a roller or film rack alignment issue, and often show up after switching to a different film roll size. Double check your film rack is seated correctly and rollers are free of buildup before troubleshooting further.
When to Call for Service
If you've checked the basics and the issue persists, it may be time for a professional look. Our service team can diagnose the issue, or browse spare part kits to keep common wear items on hand and avoid downtime next time.
