Bosch Dishwasher Error Code E24 — What It Means & How to Fix It

What Does This Error Mean?

The E24 error on your Bosch dishwasher means it cannot drain the water properly. The drain cycle took too long or the water level did not drop as expected. Something is blocking or restricting the drain path.

Affected Models

Bosch 300 Series
Bosch 500 Series
Bosch 800 Series
Most Bosch built-in dishwashers

Common Causes

The drain hose under the sink is kinked, pinched, or clogged
The garbage disposal knockout plug was never removed when the dishwasher was installed
Food debris is clogging the drain pump or drain connection
The drain hose loop under the counter is too low, causing water to flow back
The kitchen sink drain itself is clogged, blocking the dishwasher drain path

How to Fix It

Check the drain hose under the sink. Make sure it is not kinked, pinched, or crushed by anything.

Straighten the hose so water can flow freely. Replace it if damaged.
If the dishwasher drains through a garbage disposal, run the disposal for 30 seconds to clear any blockage.

If the disposal was recently installed, make sure the knockout plug was removed from the dishwasher inlet.
Clean the dishwasher filters at the bottom of the tub. Remove and rinse them under running water.

Clogged filters restrict water flow and contribute to drainage problems.
Check that the drain hose has a high loop under the counter — it should go up near the countertop before going down to the drain.

Without this loop, dirty water can flow back into the dishwasher.
Run the kitchen sink to check if it drains normally. If the sink is slow, the shared drain line is clogged.

Clear the sink drain first. The dishwasher and sink often share the same drain pipe.

When to Call a Professional

If checking the hose, filter, and disposal does not fix E24, the drain pump may be faulty. A technician can test the pump motor and clear internal blockages. Expect repair costs of $150–$300 including parts and labor.

Frequently Asked Questions

What is the knockout plug on a garbage disposal?

When a garbage disposal is brand new, the dishwasher inlet is sealed with a plastic plug. If the installer forgot to punch it out, water from the dishwasher has nowhere to go. A plumber or handy person can knock it out from inside the disposal with a screwdriver.

Why does my Bosch dishwasher have standing water at the bottom?

A small amount of water in the sump area is normal. But if water covers the entire bottom, E24 indicates a drain blockage. Check the hose, filters, and disposal connection. The water should drain once the blockage is cleared.

What is the drain hose high loop and why does it matter?

The high loop is where the drain hose is secured up near the countertop before going down to the drain. It uses gravity to prevent dirty sink water from flowing back into your clean dishwasher. Most building codes require either a high loop or an air gap device.