Bosch Dishwasher E24 Error Code: What It Means and How to Fix It
Updated · from manufacturer service documentation
The E24 code on a Bosch dishwasher means it isn't draining properly, most often because the drain filter is blocked. Bosch doesn't publish a service manual with E24 in its diagnostic tables for current platforms, but their own consumer guidance and general Bosch service documentation point to the same short list of causes: a clogged filter, a hose problem, or (on new installs) a disposal knockout plug that was never removed.
What Causes the E24 Code
| Cause | Likelihood | DIY difficulty | Related part |
|---|---|---|---|
| Drain filter blocked with food debris | Most common | Easy — remove and clean filter | Filter assembly |
| Drain hose kinked, damaged, or missing its high loop | Common | Easy — check hose routing | Drain hose |
| Siphon/air gap connection not sealed | Less common | Easy — check seal | Air gap / siphon |
| Garbage disposal knockout plug not removed (new installs) | Common on new installs | Easy — remove plug | — |
| Drain pump clogged with debris | Less common | Moderate — inspect pump | Drain pump |
How to Fix the E24 Error, Step by Step
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Clean the drain filter first
Per Bosch's own guidance for this code, a blocked filter is the leading cause — remove it, rinse out food debris, and reinstall before checking anything else.
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Check the drain hose
Confirm it isn't kinked or damaged, and that it has a proper high loop — per general Bosch service documentation, missing high loops and pinched hoses are a well-known cause of poor draining across the Bosch lineup, and a lot of good drain pumps get replaced unnecessarily because this was never checked first.
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Check the siphon/air gap connection is sealed
Per Bosch's guidance, an unsealed siphon connection is a documented cause of this code.
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On a newly installed dishwasher connected to a garbage disposal, check for the knockout plug
If the disposal's inlet knockout plug was never removed, the dishwasher can fill the disposal but never actually drain anywhere — this is explicitly called out in Bosch's own troubleshooting for E24.
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If the filter, hose, and siphon all check out, inspect the drain pump for a clog
Debris that's worked past the filter can still jam the pump itself.
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If none of the above resolves it, contact Bosch support or a technician
This matches Bosch's own published guidance once basic checks are exhausted.
Which Models This Applies To
Bosch doesn't currently publish a full service manual covering E24 specifically for recent platforms, so this page combines general Bosch drain-system service guidance (filter, hose installation, high loops — the same practical causes documented across the Bosch lineup) with Bosch's own consumer support guidance for E24 on current models.
See also: Bosch dishwasher E15 (leak-detection fault, different from E24), How to reset a Bosch dishwasher, Dishwasher not draining (cross-brand).
Frequently Asked Questions
What's the difference between E24 and E15 on a Bosch dishwasher?
They're different faults — E24 is a drain/flow problem (water not leaving fast enough, usually a blocked filter), while E15 is a leak-detection shutdown (water found where it shouldn't be, in the base pan). Don't confuse the two.
Do I need to replace the drain pump for an E24 error?
Usually not — a clogged filter or a hose installed without a proper high loop are the most common causes, and both are checkable without replacing any parts.
Why does E24 happen right after installing a new dishwasher?
Check for the garbage disposal knockout plug — if it wasn't removed during installation, the dishwasher can't drain into the disposal at all, producing this exact symptom.
When should I contact Bosch support directly?
If you've cleaned the filter, checked the hose and siphon connection, and confirmed the knockout plug is removed (if applicable) and E24 persists, that's the point Bosch's own guidance points to contacting support or a technician.
Based on general Bosch dishwasher service documentation and Bosch's US consumer support guidance for the E24 error code. Last updated: .