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Most sealers work on the principle that when the sealing
arm is pressed down, it activates a microswitch which
allows electric current to pass through the heating
element (wire).
The timer automatically controls the sealing time. If there
is no timer, then the sealing time is manually controlled.
OPERATING ISSUE
Not sealing.
Not sealing.
Power lamp is on.
Sealing lamp is on.
Teflon cloth burnt.
Heating wire broken.
Seal is wrinkled.
Imperfect sealing.
Broken seal.
Not fully welded
seal.
Seal is sticking.
Page 3 of 9
TROUBLESHOOTING
CAUSES
Disconnected plug.
Heater (heating element) is broken.
Spring hook or mounting spring is loose or
poorly connected.
Loose or poor contact. Terminals and
heating element are poorly connected.
Timer malfunction prolonged heating time.
Worn Teflon adhesive under the element.
Heating timer is set too high or cooling time
is not enough.
Worn Teflon cloth. Worn silicon rubber.
Prolonged sealing time.
Sealing time too short.
Dirty Teflon cloth. Dirty silicone rubber.
1-800-295-5510
uline.com
Sealing is followed by cooling (the amount of time
needed for the seal to set). This affects the beauty of the
seal. In manual operation, this is dependent on how long
the sealing arm is pressed after the pilot light goes off. In
the automatic operation, this is the congealing time.
RECOMMENDATIONS
Check or change the plug.
Replace the heater.
Replace or tighten spring hook
connection.
Clean the terminals and adjust if needed.
Replace timer or decrease the timer
setting.
Replace Teflon adhesive.
Lower the timer setting.
Continue pressing the upper leveler for 1-2
seconds after the pilot light goes off.
Replace the Teflon cloth. Replace the
silicon rubber.
Decrease timer setting.
Increase sealing time.
Clean the Teflon cover. Clean the silicon
rubber.
0421 IH-1250
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