Appliance Spares
Quick answer: E25 on a Bosch dishwasher means a foreign object — often a piece of glass, a coin, or a toothpick — is physically jamming the drain pump impeller; the fix is to remove the filter assembly, access the pump housing, and extract the obstruction (typically a 20-minute job).
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What does E25 mean on a Bosch dishwasher?
E25 indicates that the drain pump’s motor cannot turn. Unlike E24 — which is a drainage timeout caused by restricted flow — E25 means there is a physical obstruction preventing the impeller from rotating. The motor may buzz or hum briefly as it attempts to start, then cuts out to protect itself from burn-out, triggering the fault code.
The distinction matters because the repair path is entirely different. E24 usually means cleaning the filter or straightening a kinked hose. E25 means getting into the pump housing and extracting whatever is blocking the impeller. The most common culprits are small shards of broken glass, coins that have fallen from glassware, toothpicks, twist-off bottle caps, and food bones or fruit seeds. Even a small fragment is enough to lock an impeller solid.
What causes E25 on a Bosch dishwasher?
| Cause | How to identify it | Likelihood |
|---|---|---|
| Foreign object in pump impeller (glass, coin, toothpick) | Impeller will not rotate manually when filter is removed; buzzing sound during drain | Very likely — accounts for the majority of E25 faults |
| Chipped glass or broken crockery fragment | Sharp debris visible in sump or pump housing; fine glass shards from a broken item | Common |
| Food bone, seed, or olive stone | Hard organic debris lodged against impeller vane; visible once pump cover removed | Common |
| Twist-off bottle cap or broken plastic | Plastic fragment lodged in pump housing; visible on inspection | Uncommon but well documented |
| Pump bearing or shaft failure (worn) | Impeller turns freely with no obstruction present but pump still does not drain; motor hums without resistance | Uncommon — typically machines over eight years old |
How to fix Bosch E25: step-by-step
- Switch off power at the wall and open the dishwasher door. Remove all crockery, cutlery, and the lower basket to give yourself clear access to the floor of the tub. Soak up any standing water with a towel or sponge.
- Remove the filter assembly. Twist the cylindrical filter anti-clockwise and lift it out. Remove the flat mesh filter plate beneath it. Set both aside — you can clean them while you have the machine open.
- Locate the pump housing cover. With the filter removed, you will see the sump basin. The drain pump housing cover is typically a flat or slightly domed circular plate at the base of the sump, secured by two tabs, a bayonet fitting, or a single screw depending on the model.
- Unscrew or unclip the pump cover. On most Bosch models, turn the cover anti-clockwise approximately 90 degrees to release the bayonet tabs, then lift straight up. Have a towel ready — residual water in the sump will flow out.
- Inspect and clear the impeller. Reach into the pump housing and attempt to rotate the impeller by hand. If it will not turn, feel carefully for debris — use long-nose pliers or tweezers if the obstruction is glass or sharp material. Extract all fragments you can find. When the impeller spins freely with no grinding or resistance, the obstruction is clear.
- Reassemble the pump cover, mesh filter, and cylindrical filter. Ensure the pump cover clicks or locks into position before replacing the filter assembly.
- Replace the lower basket, restore power, and run a short cycle or forced drain. On most Bosch models, hold the Start button for three seconds with the door closed to trigger a drain cycle. Confirm the machine drains fully and E25 does not return.
Safety note: Always use tweezers or pliers when retrieving glass fragments — never reach blindly into the pump housing with bare fingers. Even small glass shards are sharp enough to cause a serious cut.
Frequently asked questions about Bosch E25
What is the difference between E24 and E25 on a Bosch dishwasher?
E24 is a drainage timeout — the pump is running but water cannot flow fast enough, usually because the filter or drain hose is blocked. E25 is a pump obstruction — the impeller physically cannot rotate because something is jammed inside the pump housing. E25 often produces a buzzing or humming noise as the motor strains. E24 is usually silent during the drain phase if the pump has given up.
How do I access the drain pump on a Bosch dishwasher without removing the machine from under the bench?
Yes — you can access the Bosch drain pump from inside the tub without pulling the machine out. Remove the lower basket, remove the filter assembly, and the pump cover is accessible from above. You do not need to disconnect any plumbing or pull the machine out for an obstruction removal.
My Bosch dishwasher is making a buzzing noise and showing E25 — is the pump damaged?
The buzzing is the motor attempting to turn against a blocked impeller. Bosch drain pump motors have thermal protection that cuts power if the motor overheats, so brief buzzing attempts usually do not destroy the motor. Once the obstruction is removed, the pump will typically run normally. If you remove the obstruction and the pump still does not run or runs noisily, bearing wear or motor damage may have occurred and the pump should be replaced.
How do I prevent E25 from happening again?
The most effective prevention is to always scrape plates thoroughly before loading, avoid washing items with small loose components (toothpicks, cocktail sticks, bottle caps), and check glassware for chips before loading. A chipped rim can shed a fragment during the wash cycle that ends up in the pump. Bosch recommends against washing items with cracked glass for this reason.
Can I replace just the impeller, or do I need to replace the whole drain pump?
On most Bosch dishwasher drain pumps, the impeller is not sold as a separate part — the pump is replaced as a complete assembly. If the impeller vanes are cracked or chipped (which can happen when hard objects pass through), a full pump replacement is the correct repair rather than attempting to source the impeller alone.
Related articles
- Bosch Dishwasher E24 Error Code — Drain Blocked Fix
- Bosch Dishwasher E22 Error Code — Filter Blocked Fix
- Bosch Dishwasher E15 Error Code — Water in Base Fix
Ready to fix it?
If clearing the obstruction reveals a damaged pump that needs replacing, use the Part Finder to locate the correct drain pump assembly for your Bosch model — there are several variants across the range and fitting the right one matters.
Disclaimer: this article is general information only and is provided without warranty of any kind. Appliance designs vary between models and production runs — always follow the manufacturer’s instructions, switch off and unplug the appliance before starting any work, and confirm parts against the model number on your appliance’s model sticker. Any repair is undertaken at your own risk and Oz Appliance Spares accepts no liability for injury, loss or damage arising from work performed after reading this guide, to the maximum extent permitted by law. If in doubt, use a qualified technician.
