Bosch Dryer E:01 Stops the Cycle Because It Ran Too Hot

What E:01 means

If your Bosch dryer quit mid-cycle with E:01 on the display, it shut itself down for running too hot. The documented reason is restricted airflow, meaning a lint filter or exhaust duct that has clogged. Detection comes from the burner or lint-screen temperature sensor. Bosch's own first instruction for this code is simple: halt the dryer straight away, and do not simply start it again.

Common causes of E:01

Lint filter clogged, including the almost invisible film that fabric softener sheets leave on the mesh
Exhaust duct that is blocked, crushed, or run longer than Bosch permits
Outside vent flap that is stuck shut or obstructed

✓ One safe check you can try

1. Stop the dryer and leave the door open so heat can escape. 2. Pull the lint filter and clean it. If the mesh looks clear but feels sealed, wash it by hand in warm water with dish soap. 3. Wait for the drum to cool completely. 4. Start the program again. Should E:01 return, leave the dryer alone and call us.

! Why to stop there

Dryers with restricted airflow are a known source of house fires, which makes this a code to respect and not to clear and ignore.
Softener sheets coat the fine mesh with a film you cannot see, and brushing does nothing to remove it.
When both the filter and the visible duct are open, the blockage is deeper in the run, past anywhere a vacuum nozzle at the wall can reach.
Checking the temperature sensors means working next to the heating circuit, which has to be isolated beforehand.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Dryer codes

E:03Bosch Dryer E:03 Appears When Laundry Will Not Get Dry Enough E:11Bosch Dryer E:11 Is a Quiet Early Warning About Airflow E:15Bosch Dryer E:15 Means the Heating Circuit Is Not Working E:17Bosch Dryer E:17 Reports the Exhaust Air Sensor Is Off E:18Bosch Dryer E:18 Flags the Sensor Above the Heater E10Bosch Dryer E10 Points to the Control Module or Its Wiring E12Bosch Dryer E12 Means It Overheated From Blocked Airflow E52Bosch Dryer E52 Signals a Problem With the NTC Temperature Sensor

E:01E:01 questions

I cleaned the filter and the code showed up again. Where do I look next?

Further along the exhaust path. Duct cleaning that covers the stretch inside the wall and the outdoor flap is what normally resolves it once the filter has been ruled out.

My Filter light will not go out even though I cleaned the screen. Why?

Bosch's manual explains that the very fine mesh clogs gradually when softener or dryer sheets are in use. It needs a hand wash with dish soap and water; brushing alone leaves the film.

Is it okay to restart the dryer once it has cooled?

Only after the filter is clean, and only once. If E:01 comes back, repeated hot runs against a blocked duct are exactly how a nuisance turns dangerous, so stop and call us.