Bosch Dishwasher Error E24: What It Means & How to Fix It
Quick answer: E24 on a Bosch dishwasher means the machine is draining too slowly or not at all — in the large majority of cases the filter or drain hose is blocked, not a failed drain pump.
“Dishwasher kept ending early with standing water everywhere and E24 on the display. Ruslan cleared the filter and hose, then tested the pump before he left just to be thorough. Runs clean now.”
Quick Answer
Bosch dishwashers time each drain phase and expect water to clear within a set window. E24 trips when that doesn’t happen. Because it’s a timing-based fault rather than a specific component diagnosis, checking what could be restricting flow — the filter, the hose, the air gap — comes before assuming the pump itself has failed.
What Does E24 Mean?
A clogged filter at the bottom of the tub is the single most common cause, followed by a kinked or blocked drain hose, and — for dishwashers plumbed under a sink — a clogged garbage disposal knockout plug or blocked air gap that was never fully cleared during installation.
4 Steps to Diagnose E24
Remove and clean the filter assembly.
Twist and lift out the cylindrical filter at the bottom of the tub — rinse it thoroughly under running water, checking for trapped food debris.
Check the drain hose for kinks.
Look behind and underneath the machine for any pinched or bent sections along its length.
Check the air gap or garbage disposal connection if applicable.
If your dishwasher drains through a garbage disposal, confirm the internal knockout plug was removed during installation — a surprisingly common oversight.
Have the drain pump tested if all of the above are clear.
A failed pump needs a technician’s diagnosis and replacement.
Can You Fix This Yourself?
Cleaning the filter is designed to be a simple homeowner task — Bosch makes it tool-free specifically for this. Checking the hose for kinks and the air gap/disposal connection are equally accessible. If all three check out clean and E24 persists, the drain pump itself is the next suspect, and that’s technician work involving more disassembly.
What Happens When You Call Star Appliance Repair
- Free service call with any completed repair — you’re never charged just to have us look
- Upfront price before any work begins, once the exact part is confirmed
- Most calls booked before noon get same-day service
- Manufacturer-approved parts, backed by our written warranty
Frequently Asked Questions
How often should I clean the filter?
Once a month for average use is a reasonable baseline — more often if you notice food debris building up or don’t pre-rinse dishes.
Can I keep running the dishwasher with E24 showing?
Not recommended — it’ll likely stop mid-cycle with standing water inside until the blockage is cleared.
Is the garbage disposal knockout plug really that common a cause?
Yes, especially after a new disposal installation — it’s one of the most overlooked steps and a very common cause of drainage complaints.
How much does a pump replacement cost if it comes to that?
It’s a moderate repair — your technician confirms exact cost once the simpler causes are ruled out.
*Same-day service is offered whenever possible and depends on technician availability, parts, and your location within the GTA.