Bosch dishwasher error code

E18

Low water level

Not enough water is coming into the dishwasher, often because of a low supply or a pinched hose.

Also shown on some Bosch models as: E:18 E3200

Try these free fixes first

Unplug the dishwasher before opening any panel.

  1. Make sure the water supply valve under the sink is fully open.
  2. Check the inlet hose for kinks, squashing or damage.
  3. Check that other taps in the home have normal water pressure.
  4. Unplug the dishwasher, then plug it back in and run a test cycle.

Still showing E18?

If the supply is good and the code returns, a technician should check the inlet valve and its filter screen.

Water inlet valveCheck 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 E18 mean on a Bosch dishwasher?

E18 on a Bosch dishwasher means: low water level. Not enough water is coming into the dishwasher, often because of a low supply or a pinched hose.

How do I fix Bosch dishwasher error E18?

Make sure the water supply valve under the sink is fully open. Check the inlet hose for kinks, squashing or damage. Check that other taps in the home have normal water pressure. Unplug the dishwasher, then plug it back in and run a test cycle.

When should I call a repair technician?

If the supply is good and the code returns, a technician should check the inlet valve and its filter screen.

Related dishwasher codes

Samsung 4CDishwasher: Water supply problemSamsung 9EDishwasher: Not enough waterLG IEDishwasher: Not enough water fillingLG FEDishwasher: Too much water in tubWhirlpool H20Dishwasher: Not detecting waterGE C4Dishwasher: Float switch or sump issue

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