A non-heating sealer is one of the most common issues users encounter, but 80% of cases come from simple causes—not major machine failures.
Here are the five most common reasons your sealing machine isn’t heating:
1. Broken Heating Wire
High-temperature cycles wear them out.
If the wire looks dark or distorted, replace it.
2. Burned Fuse
Many users don’t know sealers have their own fuse.
If the machine suddenly stops heating, this is a top suspect.
3. Faulty Thermostat
If the temperature knob turns but the heat doesn’t rise, the thermostat likely needs replacement.
4. Loose Internal Connections
Transportation vibration can loosen wires.
A quick check often solves the issue.
5. Oxidized Heating Plate
If heating is unstable, the plate surface is probably aged or oxidized.
The goal of this guide isn’t to turn you into a technician—
but to help you decide what you can fix instantly and what should be handled by your supplier.