Bosch dishwasher code E24: not draining: drain hose or disposal

What it means

Water isn’t draining out properly. Bosch lists a kinked or blocked drain hose, a clogged air gap, a loose drain pump cover, or a new garbage disposal that still has its knockout plug in.

On models without a display, Bosch signals this with: four lights flashing, or the Active and Clean lights flashing.

What to try

Unplug the dishwasher before any step beyond a quick look, and turn the water off before touching hoses.

1. Disconnect the dishwasher from power before reaching inside: unplug it, or switch off its breaker if it’s hardwired.
2. Check the drain hose under the sink for kinks or sharp bends.
3. If it drains into a garbage disposal that was just installed, make sure the knockout plug has been removed from the disposal’s dishwasher connection.
4. If you have an air gap on the sink, clear it. Bosch says to disconnect the drain hose over a bucket, clear any debris, reconnect it and run a rinse cycle.
5. Check that the drain pump cover, under the filter, is clicked firmly in place (see E25 for how).
6. Restore power and reset the dishwasher.

Call a technician if

Resetting a Bosch dishwasher

Once you’ve fixed the cause, Bosch’s way to cancel the cycle and clear the code is to press and hold Reset (Start on some models) for about 4 seconds. The dishwasher pumps out the water, which takes about a minute; then open the door and press On/Off. For electronic faults, Bosch’s code list says to switch the dishwasher off at its breaker for 30 seconds. If four lights flash and it beeps, Bosch says to press On/Off, switch off the power for at least 2 minutes, then switch it back on; if it happens again, press On/Off, turn off the water, unplug it and call Bosch.

Still stuck?

Dishwasher won’t drain: full Fix Finder6 checks for any brand, quickest first.

Sources