Start with the Filter
The cylindrical filter and coarse screen in the base of the tub are the first thing to check. Food debris clogs them and slows or stops drainage, and a clogged filter is the single most common cause of E24. Twist the filter out, rinse it, and clear the sump underneath before anything else.
| Check | Common Finding | Action |
|---|---|---|
| Filter and sump | Food debris | Clean and rinse |
| Drain hose | Kink or blockage | Straighten, clear |
| Air gap | Grease buildup | Clean the fitting |
| Drain pump | Jammed impeller | Clear or replace pump |
Check the Drain Hose and Air Gap
Follow the drain hose from the machine to the sink. A kink behind the cabinet, a blockage where it connects to the disposer or air gap, or a hose that has slipped are all common. If your sink has an air gap fitting, unclip and clear it; they collect grease and debris and are an overlooked cause of E24.
The Disposer and Sink Connection
If the dishwasher drains into a garbage disposer, a plug left in the disposer inlet after installation, or food packed in the inlet, will block drainage completely. Clearing the disposer and running it often restores flow. A backed-up sink drain will do the same thing.
Testing the Pump
If the filter, hose, air gap and disposer are all clear and E24 persists, the drain pump itself may be failing or jammed by a shard of glass or a bit of debris in the impeller. A technician checks the pump for continuity and free rotation and clears or replaces it as needed.
Standing Water and an E24?
Book a visit or call now. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
What Causes E24 on a Bosch Dishwasher?
E24 is a drainage fault. The usual causes are a clogged filter, a kinked or blocked drain hose, a blocked sink air gap, or a plugged disposer inlet. A failed drain pump is possible but less common than a simple blockage.
How Do I Fix an E24 Error Myself?
Clean the filter and sump, check the drain hose for kinks, clear the air gap, and run the disposer if the dishwasher drains into it. That resolves most E24 faults. If it persists after all of that, the pump needs testing.
Why Is There Water Left in the Bottom After E24?
Because the machine stopped mid-drain when it could not clear the water in time. Removing the standing water and cleaning the filter is the first step before diagnosing further.