Bosch Dryer E12 error code
- Dryer
On Bosch dryers, error E12 indicates: Heat-pump limescale or overheating from restricted airflow — clean the lint screen and heat exchanger. Start with a 5-minute power reset at the breaker, then follow the dryer-specific checks below before ordering replacement parts for E12.
Reviewed August 2025 · sources below
Safe to keep using?
No safety issue
This is a status or lock code, not a hardware fault.
How to fix E12
- Unplug the dryer or turn off power at the breaker before inspecting any components.
- Reset Bosch E12: leave power off for 5 minutes, restore power, then restart. Confirm whether E12 returns.
- Check the most common cause for E12: Heat-pump limescale or overheating from restricted airflow — clean the lint screen and heat exchanger.
- Inspect hoses, connections, and visible wiring for damage, clogs, or loose fittings.
- If a reset and basic checks don't clear the code, use our lookup tool for AI-powered diagnosis or contact a qualified technician.
- Reassemble, restore power, and run a test cycle. If E12 returns, the faulty component likely needs replacement.
Call a pro when: Call a technician if you smell burning, see sparking, hear grinding from the motor, or the code returns after replacing the suspected part.
Next step
Still having trouble after the code fix?
This code is usually a status or maintenance notice, not proof of a failed part. Try the steps above first; then describe what still isn't working.
Free guided checks · No account required · Don’t open live electrical, gas, or refrigerant equipment
What E12 means
Heat-pump limescale or overheating from restricted airflow — clean the lint screen and heat exchanger.
Likely causes
Heat-pump limescale or overheating from restricted airflow — clean the lint screen and heat exchanger.
Check: Press Power or Start/Pause to clear the code, then restart the cycle.
Est. cost: $0–$0
Too many elbows or a crushed flex hose chokes airflow even after you clean lint.
Check: Run the dryer and confirm strong air at the outdoor vent flap. Shorten or replace crushed duct.
Est. cost: $0–$40
Guided repair checklist
Complete the safe checks one at a time. Progress is saved for this browser so you can continue later.
0 of 6 checks recorded
Recommended next action
Start with this check before considering replacement parts.
Check 1 of 6
Unplug the dryer or turn off power at the breaker before inspecting any components.
Did the repair resolve the issue?
Restoring repair progress…
Questions about E12
What does E12 error code mean on a Bosch dryer?
Heat-pump limescale or overheating from restricted airflow — clean the lint screen and heat exchanger.
How do I reset Bosch dryer E12?
Unplug the dryer or switch it off at the breaker for 5 minutes, then restore power and restart. A reset clears a stored E12 after a glitch, but the code will return if the underlying fault is still present.
What part do I need for Bosch E12?
Not always — some E12 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.
Can I fix Bosch error E12 myself?
Many E12 errors can be fixed DIY if you're comfortable with basic tools. Start with the reset and steps above. If the issue involves electrical components or the code returns after replacing parts, call a professional.
Bosch E12 on specific models
Other Bosch Dryer codes
Prevent this problem next time
- Use lock features only when needed
- Avoid cutting power mid-cycle
Sources
Manufacturer meaning
Heat-pump limescale or overheating from restricted airflow — clean the lint screen and heat exchanger.
FixApplianceCode guidance
Clear the E12 status code and restart. No replacement part is needed.
Source type: Editorial
Source: FixApplianceCode status-code guidance
Last reviewed: 2026-10-24
Repair guidance is for informational purposes only. We do not guarantee that any fix will resolve your issue, and you assume all risk when following these steps. Terms & disclaimer
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