A Bosch dishwasher that stops mid-cycle and flashes a code isn’t being difficult. It’s telling you exactly what’s wrong, in a language most people have never learned to read. Codes E15, E22, E24 and E25 are four of the most common faults Bosch owners run into, and they all point to real, fixable problems rather than a dying machine.
This guide breaks down what each code means, what typically causes it, and which ones are safe to check yourself before calling in a professional. National Appliance Repairs services Bosch dishwashers across Melbourne, Sydney, Brisbane, Adelaide and Perth, so we see these codes on a regular basis.
How Bosch Error Codes Work
Bosch dishwashers use a control board that constantly monitors water level, drainage, and leak sensors. When something falls outside the expected range, the board locks the wash cycle and displays a two-digit code so the fault can be identified quickly rather than guessed at. Bosch shares this system across its own dishwashers and those made by sister brand Siemens, which is why the codes look similar across both.
E15: Leak Protection Has Been Triggered
E15 means the dishwasher’s leak protection system, sometimes called AquaStop, has detected water sitting in the base pan underneath the tub. Rather than let that water spread, the machine shuts everything down.
Common causes include:
- A worn or damaged door seal letting water escape during the wash
- A cracked or loose hose connection
- Overfilling caused by a stuck float switch
- Excess suds from using the wrong detergent, causing overflow
If E15 appears once and doesn’t return, it may have been a one-off overflow. If it keeps coming back, there’s an active leak somewhere in the system, and continuing to run the dishwasher risks water damage to your kitchen floor and cabinetry.
E22: The Filter Is Blocked
E22 is usually the simplest of the four to resolve. It means the fine filter at the base of the tub has become clogged with food debris, grease, or limescale, restricting water flow enough that the machine can’t complete its cycle properly.
Regular filter cleaning prevents this from recurring. Bosch recommends removing and rinsing the filter assembly every few weeks, more often in households that don’t pre-scrape plates.
E24: Drainage Failure
E24 shows up when the dishwasher can’t drain water out at the end of a cycle. The most common causes are:
- A clogged drain filter or hose
- A kinked or incorrectly installed drain hose causing siphoning
- Debris caught in the drain pump
Because E24 and E25 both relate to drainage, it’s worth checking the filter first (see E22 above), since a blocked filter often triggers both codes over time.
E25: Drain Pump Blocked or Disconnected
E25 points specifically to the drain pump. Either something is physically blocking the impeller, such as a piece of glass or a stray label, or the pump cover has come loose or wasn’t reattached correctly after a previous clean.
This one usually requires removing the pump cover to inspect the impeller directly, which is a fiddly job and easy to get wrong on newer VarioDrawer or premium quiet models where components are more tightly packed.
Bosch Error Code Quick Reference
| Code | What It Means | Typical Cause | DIY Difficulty |
|---|---|---|---|
| E15 | Leak detected in base pan | Worn door seal, loose hose, overfilling | Moderate — safe to inspect, risky to ignore |
| E22 | Filter blocked | Food debris, grease, limescale buildup | Easy — regular maintenance task |
| E24 | Water won’t drain | Blocked filter, kinked hose, siphoning | Moderate — often resolves with filter clean |
| E25 | Drain pump blocked or loose | Debris in impeller, loose pump cover | Harder — requires opening the pump housing |
When to Call a Professional Instead
Cleaning a filter or checking a hose for kinks is reasonable weekend maintenance. Call a technician if:
- The same code returns after you’ve cleaned the filter and checked the hoses
- You see active dripping, pooling water, or corrosion around the base
- The dishwasher won’t start at all after the fault
- You’re not comfortable pulling the unit out from under the bench
Persistent E15 in particular shouldn’t be left to run its course. A leak that keeps triggering the safety system is telling you it’s still there, and letting a dishwasher run with an active leak risks water damage that costs far more than the repair itself.
While National Appliance Repairs isn’t an official Bosch authorised service centre, our technicians are trained on Bosch’s engineering and carry genuine parts for common faults across our vans. Many drainage and filter-related repairs on our dishwasher repair service are completed the same day, and every repair carries our 12-month parts and 3-month labour warranty.
Frequently Asked Questions
Can I keep using my Bosch dishwasher if E22 keeps coming back after I clean the filter?
No. If E22 returns after a proper filter clean, there’s likely a secondary blockage in the spray arm, drain hose, or pump that a filter clean alone won’t fix. Continued cycles with a partial blockage can strain the pump motor.
Is E15 dangerous to ignore?
It can lead to water pooling under the dishwasher, which risks damage to flooring and cabinetry, and in some cases electrical components near the base of the unit. If E15 reappears after drying the base pan, treat it as an active leak rather than a one-off.
Are Bosch and Siemens dishwasher error codes the same?
Largely, yes. Bosch and Siemens are both part of the BSH Group and share much of the same control board platform, so the core E-codes generally match across both brands, though some model-specific sub-codes can differ.
How much does it cost to fix a Bosch dishwasher error code?
It depends on the cause. A filter clean or hose adjustment is typically low-cost, while a drain pump replacement or door seal repair is more substantial. Call 1300 434 380 for a free phone consultation and a ballpark estimate before booking.
Will fixing an error code myself void my Bosch warranty?
Basic maintenance like cleaning the filter generally won’t affect your warranty. More invasive repairs, especially anything involving the pump or control board, are best left to a professional to avoid voiding cover or causing further damage.
Getting Your Bosch Dishwasher Back on Track
Most of these four codes trace back to a handful of causes: a blocked filter, a worn seal, or debris in the drain system. Regular filter cleaning prevents a good portion of these faults from happening in the first place, and catching a leak code early is far cheaper than dealing with water damage later.
If your Bosch dishwasher keeps throwing the same code after basic troubleshooting, National Appliance Repairs services Bosch appliances across Australia’s metro areas with same-day appointments where available.
Contact us or call 1300 434 380 for a straightforward diagnosis and upfront quote.
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