How to Fix Bosch Dryer Error E12

Written by

⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.

Error Code: E12 Difficulty: Moderate

Problem: Severe overheating, typically due to a blocked lint filter or exhaust vent.

⚖️ Repair Decision

✅ WORTH FIXING

Parts under $100

How to Fix E12 Error (Step-by-Step)

Disconnect the dryer from its power source by unplugging it.
Access the back of the dryer and locate the thermal fuse on the heating element or blower housing.
Carefully detach the wires connected to the fuse and confirm the error stays cleared during a full test cycle.
Unscrew the thermal fuse from its mounting and remove it.
Install the new thermal fuse and secure it with the screw.
Reattach the wires to the terminals of the new fuse.
It is critical to clean the entire venting system, from the lint screen to the outside exhaust vent, to address the cause of the severe overheating.
Turn the appliance off, wait about 2 minutes, then turn it back on.

OEM Part #: Thermal Fuse

Estimated Market Price: $10-$30

Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.

Appliance Type

Appliance Age

Estimated repair cost (parts, or parts + labor) Most DIY parts are $50–$250. If you have a quote, use the total.

Is it under warranty?

More options (for a better recommendation)

Brand

Your DIY Skill Level

Get the ‘Secret Service Mode’ Cheat Sheet for your Bosch model. Includes an easy-to-read list of every error code and quick diagnostic tips.