Bosch Dishwasher Not Draining? (E24 Error Code + Triple Filter Guide)
Quick Fix: The E24 error code on Bosch dishwashers means there’s a drainage problem. In 90% of cases, cleaning the triple filter system at the bottom of the tub fixes it. Bosch filters need cleaning more often than most brands due to their fine filtration.
Bosch dishwashers are known for quiet operation and excellent cleaning. But they require regular filter maintenance. The E24 error is Bosch’s way of telling you water isn’t draining properly.
Video guide
Video: “Bosch Error Code E-24, Drain Problem, Easy FIX” by Tomi Your Trades Guy
Understanding the E24 error code
E24 is Bosch’s drainage error code. It appears when:
- Water can’t drain from the dishwasher
- Drainage is too slow
- The drain pump can’t complete its cycle
Other drainage-related codes:
- E25, Drain pump blocked or cover not secured
- E22, Filter clogged
All these errors point to the same troubleshooting process: start with the filters. For official error code definitions, see Bosch’s dishwasher support page.
Bosch’s triple filter system
Bosch uses a sophisticated three-part filter system:
Nothing fancy.
First, install the coarse filter to catch large debris, next attach the flat fine filter to handle medium particle filtration, then position the micro filter (cylindrical) to ensure fine particles are removed for spot-free dishes.
Why Bosch filters clog faster: The micro filter is extremely fine, that’s how Bosch achieves such clean results. But this means it needs cleaning more frequently than other brands.
What You’ll Need
- Towels
- Soft brush or toothbrush
- Dish soap
- Flashlight
Step 1: remove and clean all three filters
Accessing the filters:
Open the dishwasher, extract the lower rack, then twist the spray arm counterclockwise and pop it off. Descend into the basin where you’ll find a cylindrical filter centered on the floor, turn its handle in reverse to lift up and reveal the flat metal plate beneath; that’s the one you need to pry free.
Cleaning each filter:
Cylindrical micro filter:
- Rinse under warm running water
- Use a soft brush inside and outside the mesh
- Hold up to light, you should see through the mesh clearly
- Soak in warm soapy water if heavily soiled
Flat fine filter:
- Rinse both sides thoroughly
- Scrub with a soft brush
- Check for grease coating, this blocks water flow
- Use dish soap for stubborn grease
Coarse filter (in the sump):
- Check the sump area where filters sit
- Remove any large debris by hand
- Wipe the area clean
Step 2: check the drain pump cover
Bosch dishwashers have a drain pump cover that can come loose or get blocked.
Location: Inside the tub, in the sump area where the filters sit.
To check: First, with the filters removed, look for a round plastic cover that should be secure and flat; press down to ensure it is seated properly, as any looseness could indicate that debris has bypassed the filters and potentially jammed the pump.
If you see debris in the pump area: First, use a flashlight to examine inside the pump housing, then remove any visible debris such as glass, bones, or plastic; be cautious of broken glass, which is common. After that, ensure the pump impeller spins freely without obstruction.
Step 3: inspect the drain hose
The drain hose is where water exits to your sink drain or garbage disposal.
Under your sink, check: First, ensure that the hose is not kinked or crushed; next, confirm that the high loop is correctly positioned so that the hose rises before it drops into the drain; then, make sure the connection is not inserted too deeply into the disposal.
Bosch-specific note: Bosch recommends connecting to an air gap if available. If using a high loop, it must reach at least as high as the countertop underside.
Step 4: check for hose blockages
Even if the hose looks fine outside, it can be blocked inside.
Easy to miss.
Testing the hose: First, disconnect the hose at the disposal or drain end, then have a bucket ready to catch any water that might spill. Next, run a drain cycle and ensure water flows freely; if it doesn’t, the blockage is likely within the hose or pump.
Clearing a blocked hose: First, disconnect both ends of the pipe, then flush it thoroughly with water from a garden hose. If necessary, use a long brush or a straightened hanger to clean any remaining blockages. Once that is done, replace the pipe if it is heavily blocked or damaged.
Step 5: reset the bosch dishwasher
After cleaning and checking components, reset the error:
Method 1. Button reset:
- Press and hold the Start button for 3-5 seconds
- The E24 should clear
- Run a short cycle to test
Method 2. Power reset:
- Turn off the dishwasher at the circuit breaker
- Wait 5 minutes
- Restore power
- Run a test cycle
Method 3. Cancel/Reset:
- Open the door
- Press and hold the Start button until “0:01” appears
- Close the door, this runs a drain cycle
- Open after the pump stops
Bosch-specific issues
E24 keeps coming back
If E24 returns after cleaning:
- Not cleaning thoroughly enough, Bosch filters need scrubbing, not just rinsing
- Pump impeller jammed, Small debris like glass or olive pits
- Drain pump failing, Especially in dishwashers over 7-8 years old
- Check valve stuck, Allows water to backflow
Bosch drain pump access
The drain pump on Bosch dishwashers is located at the bottom. To access:
First, turn off the power and water supply to ensure safety. Next, remove the kickplate, which is the lower front panel of the dishwasher. The pump inside is a circular unit with hose connections, so proceed carefully when accessing it; you may need to pull the dishwasher out further to fully access the pump.
Pump testing: See our drain pump guide for multimeter testing procedures.
Bosch 800 series and benchmark
Premium Bosch models have the same filter system but may have additional sensors. If error codes persist after cleaning, the control board may need professional diagnosis.
Bosch filter cleaning schedule
Bosch dishwashers need more frequent filter cleaning than most brands:
| Usage Level | Cleaning Frequency |
|---|---|
| Light (1-2 cycles/week) | Monthly |
| Normal (4-5 cycles/week) | Every 2 weeks |
| Heavy (daily) | Weekly |
Pro tip: Check the filter every time you notice dishes aren’t as clean. often, filtration issues and drainage issues have the same cause, a dirty filter.
When to Call Bosch Service
Contact Bosch support if:
- E24 persists after thorough filter cleaning
- Pump makes no sound during drain cycle
- You find water leaking under the dishwasher
- E25 code appears repeatedly (pump cover issue)
Bosch support: 1-800-944-2904
Warranty: Bosch dishwashers typically have a 1-year full warranty and additional years on specific components. Check your documentation.
Preventing E24 errors
- Clean filters every 1-2 weeks for heavy use
- Scrape plates before loading
- Run hot water at the sink before starting
- Use Bosch-recommended detergent (finish, Cascade)
- Check spray arms monthly for clogs
FAQ
What does E24 mean on a Bosch dishwasher?
E24 means drainage failure, water isn’t leaving the dishwasher properly. The #1 cause is a clogged filter. Remove and thoroughly clean all three parts of the Bosch filter system. If filters are clean, check the drain pump area for debris.
How do I force my Bosch dishwasher to drain?
Press and hold the Start button for 3-5 seconds to cancel the cycle and initiate draining. Alternatively, open the door, hold Start until “0:01” appears, then close the door. The dishwasher will run a drain cycle. If it won’t drain, you’ll need to remove water manually.
Why does my Bosch dishwasher have water at the bottom?
Some water (a shallow puddle) is normal, it keeps the pump seals moist. If there’s an inch or more, the filter is likely clogged. Bosch’s fine filtration system requires more frequent cleaning than other brands. Clean all three filters and check the drain pump cover.
How do I clean the pump on my Bosch dishwasher?
With the filters removed, look into the sump area. You’ll see a round drain pump cover, press down to ensure it’s secure. Look inside for debris blocking the impeller. Use a flashlight and remove any visible objects. The impeller should spin freely when you touch it.
Need more help? See our complete dishwasher not draining guide for additional troubleshooting.