Bosch Dryer E12 error code
The dryer is overheating because airflow is restricted. Lint buildup or a blocked vent traps hot air inside instead of pushing it out.
Last updated: September 30, 2026
Quick answer: Bosch dryer error code E12: dryer overheating from restricted airflow. The most common cause is lint screen clogged. Try this first — unplug the dryer. If that does not clear it, clean the lint screen. If the code persists, call a qualified technician.
What causes the E12 error?
- Lint screen clogged
- External dryer vent blocked, bent, or obstructed
- Vent hood blocked where it exits the house
How to fix Bosch E12 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Unplug the dryer
Disconnect power before cleaning any filters or vents. - Clean the lint screen
Slide the lint screen out, remove lint by hand or with a soft brush, and for a deep clean wash it with warm soapy water, rinse, and let it dry completely before reinserting. - Check the external vent
Inspect the vent outside your home for blockages or lint on the vent hood; clean the duct with a vent brush or vacuum attachment and reattach it securely. - Restart and test
Plug the dryer back in and run a short test cycle to confirm the code clears.
When to call a technician
Stop and call a qualified technician if any of these apply:
- The code returns after full lint and vent cleaning
- The dryer still runs very hot to the touch
- You smell burning during a cycle - stop and call service
Frequently asked questions
How often should I clean the dryer vent?
Check the lint screen every cycle and inspect the external vent a few times a year; blocked vents are a leading cause of dryer overheating.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.