The E24 error on your Bosch Dishwasher means the appliance has detected a drainage problem — water isn't clearing from the tub within the expected time. This usually points to a blockage somewhere in the drain path rather than a major mechanical fault, so it's often fixable without calling an engineer.
| Error code | E24 |
|---|---|
| Meaning | Drain fault — the dishwasher cannot pump water out fast enough or at all |
| Severity | Medium — the dishwasher will usually stop mid-cycle until the blockage is cleared |
| Time to fix | 15–40 minutes |
| Tools needed | Screwdriver, towel, small bowl or cup, and a torch (optional) |
What the E24 error means
Bosch dishwashers monitor how quickly water drains out during each cycle. If the drain pump runs but the water level sensor doesn't detect a drop within a set time, the control board raises the E24 code and pauses or ends the cycle. It's the appliance's way of protecting itself from running a wash cycle with dirty standing water still in the tub.
Common causes
- Food debris or a broken piece of glass blocking the drain filter
- A kinked, crushed, or clogged drain hose behind or under the dishwasher
- Blockage in the kitchen sink air gap or garbage disposal connection
- A faulty or jammed drain pump that can't push water out
- Incorrect installation, such as the drain hose looped too low or too high
- A clogged non-return (check) valve preventing water from leaving the tub
How to fix the E24 error
- Check the drain filter: Remove the lower rack and unscrew the filter assembly at the bottom of the tub. Rinse it under a tap and remove any trapped food, glass fragments, or debris.
- Inspect the drain hose: Pull the dishwasher out slightly and check the hose for kinks, tight bends, or visible blockages. Straighten it out and make sure it isn't pinched against the cabinet.
- Clear the sink connection: If your dishwasher drains through the sink's air gap or garbage disposal, run the disposal and check the air gap fitting for buildup. Clean out any gunk with a small brush.
- Test the drain pump: Listen for a humming noise during the drain phase. If you hear humming but no water movement, the pump may be jammed or failing and could need professional replacement.
- Reset the dishwasher: Once the blockage is cleared, close the door, select a quick wash cycle, and let it run to confirm the drain issue is resolved.
- Call a technician if needed: If the error persists after clearing filters and hoses, the drain pump or control board may need professional diagnosis and replacement.
FAQ
Can I keep using the dishwasher with an E24 error showing?
It's best not to. Water may still be sitting in the tub, which can cause bad odours or leaks if you run another cycle before clearing the fault.
Is the E24 error expensive to fix?
Most cases are a simple filter or hose blockage you can clear yourself for free. A replacement drain pump, if needed, typically costs more and may require a technician.
Why does E24 keep coming back after I clear it?
Recurring E24 errors often mean the blockage is further down the line, such as in the sink's air gap or disposal unit, or that the pump itself is starting to fail.
