E12
Bosch
Exhaust Temperature Too High / Overheat Protection
Bosch dryer displays E12 and may stop heating or shut down.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Blocked lint filter, Restricted condenser (condensation/heat pump models), Failed cooling fan, Defective high-limit thermostat
How to Fix / Troubleshooting
Safety first: Unplug the dryer before cleaning internal components.
- Clean lint filter and housing: Remove and thoroughly clean the lint filter. Vacuum lint from the filter housing.
- Clean condenser unit: On condensation and heat pump models, open the lower front flap, remove the condenser, and rinse with warm water until clean. Allow to dry fully.
- Check cooling fan: Access the internal fan (often near the compressor or condenser). Ensure it spins freely and is not obstructed by lint. Replace if the motor is not running.
- Inspect thermostats: Test the high-limit thermostat and thermal cutoffs for continuity. Replace any open devices and correct airflow issues.
After cleaning and component checks, run a test cycle with a small load to confirm normal operation.
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Repair Difficulty
Medium
3/5
Required Part
High-Limit Thermostat
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