E04 — Water Container Full

How to fix it

1. Slide out the condensate tank (top-left on most Bosch models) and empty into a sink.
2. Reinstall the tank firmly until it seats — listen for the click.
3. If error persists, remove the tank again and clean the float and tank seating area with a damp cloth.
4. Check that the float inside the tank moves freely.
5. If hard-plumbed to a drain, inspect the drain hose for kinks and check that the pump runs (you'll hear it briefly after a cycle).
6. Reset by pressing Start; the code should clear once the tank is properly seated and empty.

Why it happens

Typical signs: Cycle pauses with E04 or container-full icon · Water container icon illuminated · Dryer will not start a new cycle

• Condensate tank full of water Normal — tank fills after 1-3 cycles depending on load size.
• Condensate pump failure If a drain hose is installed, the pump that lifts water to the tank or drain has failed.
• Float switch stuck in tank cavity Switch that signals 'tank present and empty' is stuck or dirty.
• Drain hose kinked or blocked On hard-plumbed installations, water backs up to the tank and triggers the sensor.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

• Bosch dryer condensate tank Common replacement
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• Bosch dryer condensate pump Common replacement
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More Bosch dryer codes

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