E:04Bosch Dryer — Bosch Dryer E:04 Error Code
Lint filter extremely clogged
Severity
Warning
Difficulty
Easy
Est. Cost
What's Happening
The lint filter is so clogged that airflow sensors detected a critical restriction. Bosch heat pump dryers monitor airflow through the filter and warn when it's severely blocked.
How to Fix It
Remove the lint filter and clean thoroughly under running water. Also clean the condenser heat exchanger behind the lower access panel. Once cleaned, the error should clear on the next cycle. Clean the filter after every load to prevent recurrence.
Frequently Asked Questions
What does E:04 mean on a Bosch dryer?
E:04 means the lint filter is critically clogged. The dryer's airflow sensors detected that the filter is severely restricting air movement.
How do I clean a Bosch dryer lint filter?
Remove the filter from inside the door, peel off lint by hand, then rinse under running water. Let it dry before reinstalling. Clean after every load.
Can I prevent E:04 on my Bosch dryer?
Yes. Clean the lint filter after every load and wash it under running water weekly. Also clean the condenser heat exchanger monthly.