According to Bosch’s own support page, the E24 error code means your Bosch dishwasher is not draining properly, most often due to a blocked drain filter. Independent repair guides broaden this slightly, pointing to any restriction along the drain path — a clogged filter, a kinked or blocked drain hose, an unremoved garbage disposal knockout plug, or debris jamming the drain pump impeller. Start by cleaning the filter, since it resolves roughly 40% of E24 cases on its own, then work through the drain hose, garbage disposal connection, and pump area if the code persists.
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What Does the E24 Error Actually Mean?
E24 is a drainage error: your dishwasher has detected that water isn’t leaving the tub properly during or after the drain phase, and it stops the cycle rather than continuing with standing water inside. Bosch’s own documentation ties E24 specifically to a blocked drain filter, while several independent appliance repair sources describe it more broadly as any restriction anywhere along the drain path — filter, hose, pump, or the connection to your sink or garbage disposal. In practice, you’ll usually notice one or more of these symptoms alongside the code:
- Water pooling at the bottom of the tub after a completed cycle.
- The dishwasher pausing or stopping unexpectedly mid-cycle.
- Unusual gurgling or humming sounds during the drain phase.
Common Causes of the E24 Error
- Clogged drain filter — food particles, grease, and residue build up over time and are the single most common cause.
- Kinked or blocked drain hose — a bent, pinched, or internally clogged hose prevents water from exiting the machine.
- Garbage disposal knockout plug not removed — on a newly installed disposal, a plastic plug inside the dishwasher’s inlet port must be knocked out before water can drain through it.
- Blocked or jammed drain pump impeller — small objects like glass fragments, food, or labels can get lodged in the pump and stop it from turning.
- Loose pump cover — if the cover isn’t seated correctly, the pump may not function efficiently even without a visible clog.
- Clogged air gap or disposal connection — debris here can force water back into the dishwasher instead of letting it drain out.
- Missing high loop in hose installation — without a proper high loop, water can siphon back into the tub rather than draining completely.
How to Fix a Bosch Dishwasher E24 Error
1. Clean the Drain Filter (Start Here)
Turn off the dishwasher and remove the bottom rack. Locate the filter at the bottom of the tub — most Bosch models have a fine mesh filter that lifts straight out, sometimes paired with a coarse filter underneath. Rinse both thoroughly under warm water with mild soap, removing all visible debris, then reinstall securely. This single step resolves the largest share of E24 cases.
2. Check the Garbage Disposal Connection
Run the garbage disposal for about 30 seconds to clear any food debris that might be blocking the shared drain path. If the disposal was recently installed or replaced, disconnect the drain hose from the disposal inlet and check for a plastic knockout plug still blocking the opening — this is a very common and easily overlooked cause on newer installations.
3. Inspect the Drain Hose
Pull the dishwasher out slightly (or access the hose from underneath the sink) and check its full length for kinks, pinches, or visible blockages. If you suspect an internal clog, disconnect both ends, flush the hose with water, and use a bottle brush or straightened wire to clear any obstruction. While you’re there, confirm the hose has a proper high loop before it connects to the drain or disposal, since a missing high loop can cause water to siphon back into the tub.
4. Check the Drain Pump and Impeller
With the filter removed, look into the sump area for visible debris like broken glass, food particles, or a stray label. Wear gloves, since sharp debris can hide near the impeller. Many Bosch models let you unclip the pump cover (a spoon or small flat tool often works) to check whether the impeller spins freely — if it’s stuck or struggles to turn, that’s the likely source of the error.
5. Reset the Dishwasher
Once you’ve addressed the blockage, reset the unit according to your owner’s manual. On many Bosch models, this means pressing and holding Reset or Start for about four seconds, which prompts the dishwasher to pump out any residual water and cancel the current cycle. Run a short test cycle afterward to confirm the error has cleared.
6. Run a Cleaning Cycle
If the dishwasher drains normally after these steps, running a cycle with a dedicated dishwasher cleaner (or a solution of white vinegar and baking soda) can help clear any lingering residue in the drain path and reduce the chance of a repeat clog. Avoid bleach-based cleaners if your dishwasher has a stainless steel interior.
When to Call a Technician
Most E24 errors are DIY-resolvable, but call a professional if:
- You’ve cleaned the filter, checked the disposal and hose, and inspected the pump area, and the error still returns.
- The drain pump’s impeller won’t turn at all, suggesting a failed motor rather than a simple obstruction.
- The hose has been kinked for an extended period and shows a permanent crease that restricts flow even after straightening.
- You’re not comfortable disconnecting hoses, working near the drain pump, or handling potential broken glass safely.
A persistent E24 after thorough troubleshooting often points to a genuine drain pump failure or an internal blockage deeper in the system than most owners want to access without training.
Frequently Asked Questions
What does E24 mean on a Bosch dishwasher?
It’s a drainage error. Bosch’s own documentation points to a blocked drain filter as the primary cause, while independent repair sources broaden it to any restriction along the drain path — hose, pump, or disposal connection included.
How do I clear an E24 error on my Bosch dishwasher?
Start by cleaning the drain filter, since it resolves the majority of cases. If the error persists, check the garbage disposal connection, inspect the drain hose for kinks, and look for debris blocking the drain pump impeller.
Is E24 the same as E25 or E22 on a Bosch dishwasher?
No. Different repair sources describe these codes with slightly different emphasis, but generally E22 points more toward a filter-mesh clog upstream of the pump, E24 toward drainage restriction in the hose or downstream path, and E25 toward a pump cover or check-valve issue — always confirm against your specific model’s documentation since exact meanings can vary slightly by model generation.
Can I keep using my dishwasher with an E24 error?
It’s best not to. Running cycles with standing water or a drainage restriction can put unnecessary strain on the pump and, in some cases, risk water damage if the base pan’s leak protection is also triggered.
Why does my newly installed Bosch dishwasher show E24?
The most common cause on a new installation is a garbage disposal knockout plug that was never removed, which completely blocks the drain path until it’s knocked out.
Will resetting my Bosch dishwasher fix E24 permanently?
A reset can clear the error and pump out standing water, but it doesn’t address the underlying blockage. If the cause (like a clogged filter or kinked hose) isn’t fixed first, the error is likely to return on the next cycle.
Conclusion
A Bosch dishwasher E24 error is one of the more common — and more fixable — codes you’ll encounter, since it almost always comes down to something blocking the drain path rather than a deeper mechanical failure. Start with the filter, since it resolves the majority of cases in a few minutes, then work through the garbage disposal connection, drain hose, and pump area in that order. Most homeowners can complete this troubleshooting with basic tools in under an hour. If you’ve gone through all of it and the error keeps coming back, a failed drain pump or a deeper internal blockage is the more likely explanation, and that’s the point where calling a Bosch technician is worth the cost rather than continuing to reset and rerun cycles.
