Bosch Unlimited Cordless Vacuum E3 / E4 Error Code

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What it means

The vacuum thermal safety shutoff activated.

Try this first

Turn the vacuum off.
Disconnect it from power.
Check the nozzle for blockage.
Empty the dust box.
Clean the filter.
Allow the vacuum to cool before restarting.

Can I keep using it?⚠ Thermal protection active

Repair usually required?✅ Usually no

If the error keeps returning

If E4 repeatedly returns, contact Bosch support.

Official source

Troubleshooting information verified against manufacturer support documentation.

View manufacturer support page →

Safety note:ApplianceSignal provides general troubleshooting information. Always follow the appliance manufacturer's safety instructions and disconnect power when required.

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Bosch Unlimited Cordless Vacuum E3 / E4: Quick Answer

What it means: The vacuum thermal safety shutoff activated.

First thing to check

Turn the vacuum off.

Can I keep using it?

Thermal protection active

Repair outlook

Usually no

If the code remains

If E4 repeatedly returns, contact Bosch support.

Model note: Error-code meanings and procedures can vary by model and model year. Confirm the code against the documentation for your exact appliance before replacing parts.

Manufacturer reference: bosch-home.com