Most Bosch E24 codes clear in about fifteen minutes, and the only tools involved are a towel, a flashlight, and a shallow bowl. That’s the good news about this code. It’s a drain error, and the machine is simply telling you that water didn’t leave the tub on schedule. The harder part is knowing where to look first, because the drain path runs from the filters in the tub floor, through the pump, out the hose, and into a disposal or a drain, and a restriction anywhere along it trips the same code. This guide walks that path in the order that saves the most time, starting with getting the dirty water out of the tub so you can see what you’re working on. It also clears up one mix-up that sends people to the wrong part: E24 and E25 look like twins, but they don’t point to the same place.
What E24 Is Actually Measuring
Bosch dishwashers time how quickly water leaves the sump during the drain phase. If the level doesn’t fall the way the control board expects, the cycle stops and E24 appears. Most people miss this entirely: the code isn’t a verdict that something is blocked, only that draining was too slow or didn’t happen, and a partial restriction can trigger it just as easily as a full one.
Bosch’s own support guidance ties E24 to the filter and hose side of the drain path, while many technician guides tie E25 to the drain pump itself. That split matters, because it means the filter and hose come first and the pump comes last. Exact meanings can vary by model, so the owner’s manual and the model number on the door edge are worth a glance.
Getting the Water Out First
Switch off power at the breaker or unplug the unit before reaching into the tub. On many Bosch models, holding Reset or Start for about four seconds cancels the cycle and pumps out the leftover water, though button names vary by model. If nothing drains, bail the tub with a cup into the bowl and soak up the rest with a towel.
A successful drain doesn’t mean the problem’s solved. If E24 returns on the next cycle, the restriction is still there, and the rest of this guide is where it lives.
The Filter Stack and the Pump Cover
The cylindrical filter in the center of the tub floor twists out counterclockwise, and a flat fine filter sits underneath it. Rinse both under running water, then look into the sump with a flashlight. Broken glass, olive pits, toothpicks, and bits of label are the usual finds, and they tend to collect right where the pump pulls water in.
I’ve seen this go wrong when someone cleans everything perfectly and then leaves the pump cover under the filters sitting a hair out of place. The machine can’t move water properly, E24 comes straight back, and they conclude the pump is dead. Press the cover until it seats, then lock the filters in firmly.
With the power still off, you can turn the pump impeller gently with a fingertip. It should spin with slight resistance, not grind or stick. A stuck impeller usually means a shard of something is wedged against it.
The Drain Hose, the High Loop, and the Air Gap
The drain hose runs behind and beneath the dishwasher, where it’s easy to kink and hard to see. Shut off the water supply, make sure the power’s off, and slide the unit out an inch or two. What surprised me was how many bends only showed up after that inch, a sharp fold sitting just behind the toe-kick where it had been pinched since the install.
The hose should also rise into a high loop under the countertop before dropping to the drain, which keeps dirty sink water from flowing back toward the tub. If your sink has an air gap, a small cylinder on the deck beside the faucet, lift its cap and clear the gunk inside. That little chamber clogs more often than anyone expects.
The Garbage Disposal Knockout Plug
If the drain hose connects to a disposal, a plug inside the disposal’s dishwasher inlet has to be knocked out, or water has nowhere to go. The first time I dealt with this, a brand-new disposal had been installed and the plug was never removed, so E24 showed up on the very first cycle. With the disposal switched off at the breaker, tap the plug out with a screwdriver and a hammer, then fish the loose piece out of the chamber so it doesn’t catch the blades.
What Most People Don’t Know
E24 can be a plumbing code rather than a dishwasher code. The dishwasher drains into the same line as your kitchen sink, so a slow sink trap or a clogged disposal chamber backs the dishwasher up and trips the code even when the machine is perfectly healthy. Run the sink for a minute and watch how fast it drains. If the sink is sluggish too, clear the line first, and the dishwasher will likely stop complaining without any further work.
When It’s Time to Call Someone
If the filters, pump cover, hose, high loop, air gap, and disposal plug are all clear and E24 returns after a power reset and a test cycle, the pump motor or control board is the likely cause. That’s the point to call a technician, with your model number and a list of what you’ve already cleared. Don’t buy parts before those six checks are done.
