Shredder stopped and won't restart — thermal cool-down

What this error means

Per Fellowes, every one of their shredders has thermal overload protection: exceed the duty cycle and the motor shuts down until it cools. The numbers are model-specific — small personal units run ~5 minutes before needing ~15+, the office-grade 79Ci is documented at 20 minutes run / 30 minutes cool-down. Fellowes explicitly says to wait the FULL recommended cool-down even if it'll switch on sooner — restarting hot shortens motor life.

Symptoms

• Shredder dead mid-job
• Overheat indicator lit
• Big purge session preceded it

Try this first (safe DIY steps)

1. Leave it on but idle (some models need power on to run the cooling logic) and wait the full cool-down — 15–40 minutes depending on model
2. Check your model's duty cycle in the manual and batch big purges accordingly
3. If it overheats on small jobs, the cutters likely need oil — drag creates heat (see the oiling guide)

Safety: power off before any physical intervention. Never bypass covers or interlocks — fuser areas run hot enough to burn.

When to call a technician

Only for continuous-duty commercial units under contract — office units that overheat constantly despite oiling are undersized for the workload; buy the right duty cycle.