Bosch dryer error code

E03

Condensation drain hose blocked

The hose that drains condensed water from the dryer is blocked or kinked.

Try these free fixes first

Unplug the dryer before opening any panel.

  1. Unplug the dryer.
  2. Check that the drain hose runs without kinks or sharp bends.
  3. Loosen the hose clip at the drain and gently remove the hose.
  4. Clean out the hose and the drain connection, then refit and secure the clip.
  5. Plug back in and restart.

Still showing E03?

If the code remains after cleaning the hose, call a technician; the condensate pump may be blocked or faulty.

Condensate pumpCheck that the part matches your exact model number (usually on a sticker inside the door or on the back).Find the part
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Questions people ask

What does E03 mean on a Bosch dryer?

E03 on a Bosch dryer means: condensation drain hose blocked. The hose that drains condensed water from the dryer is blocked or kinked.

How do I fix Bosch dryer error E03?

Unplug the dryer. Check that the drain hose runs without kinks or sharp bends. Loosen the hose clip at the drain and gently remove the hose. Clean out the hose and the drain connection, then refit and secure the clip. Plug back in and restart.

When should I call a repair technician?

If the code remains after cleaning the hose, call a technician; the condensate pump may be blocked or faulty.

Related dryer codes

LG E13Dryer: Condensate drain blockedBosch E01Dryer: Lint filter is blockedBosch E04Dryer: Dryer is overloadedBosch E12Dryer: OverheatingBosch E16Dryer: Door opened during cycleBosch E06Dryer: Heating circuit fault

Source: Bosch official support · Reviewed 2026-10-01