Bosch Dryer E03 error code
The condensation drainage hose, which carries away the water pulled out of clothes, is blocked or kinked. The dryer cannot get rid of collected moisture.
Last updated: September 30, 2026
Quick answer: Bosch dryer error code E03: condensation drain hose blocked or kinked. The most common cause is kink or bend in the condensation hose. Try this first — unplug the dryer. If that does not clear it, straighten the hose. If the code persists, call a qualified technician.
What causes the E03 error?
- Kink or bend in the condensation hose
- Lint or debris clogging the hose
- Hose disconnected or misrouted
How to fix Bosch E03 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Unplug the dryer
Disconnect the dryer from power before touching the back panel or hose.Safety warning: Always unplug first; never work behind a powered appliance. - Straighten the hose
Find the condensation hose at the back of the dryer and remove any kinks or sharp bends along its length. - Clear blockages
Disconnect the hose and look inside; use a long flexible brush or similar tool to remove lint and debris. - Reattach and test
Reconnect the hose with no kinks, plug the dryer back in, and run a short cycle to confirm the code is gone.
When to call a technician
Stop and call a qualified technician if any of these apply:
- The code returns after the hose is clear and straight
- Water leaks from the hose connection
- The dryer stops collecting water at all
Frequently asked questions
Where is the condensation hose on a Bosch dryer?
It is typically at the back of the dryer, carrying condensed water to a drain or the collection tank.
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.