What Does Error Code E23 Mean on a Siemens Washing Machine?
Pull the machine forward, remove the lower front panel, and use dry towels or a wet-dry vacuum to soak up any standing water in the base tray — once the sensor dries out, the error will clear and the machine can restart (allow 1–2 hours drying time, or use a fan to speed this up).
Fault description
Error E23 is triggered by the Aqua-Stop or anti-flood sensor sitting in the drip tray at the bottom of your Siemens washing machine. When even a small amount of water collects in that tray, the sensor sends a signal to the control board, which immediately halts the programme and displays E23 to prevent further water damage to your home.
When this error appears, the machine will typically lock the door, stop the drum, and refuse to start a new cycle. In many cases the drum still contains water, so the machine may attempt a partial drain before shutting down completely. The error will not clear on its own until the water in the base tray is removed and the sensor is dry.
The leak itself can range from a minor drip caused by a loose hose clip to a more serious failure such as a cracked drum seal or a split pump housing. Identifying the exact source is the key first step before attempting any repair.
Causes
- Water pooled in the base tray from a previous minor leak — Even a small, one-off drip — perhaps from an overfilled detergent drawer or a briefly loose connection — can leave enough water in the base tray to trigger the sensor. The original leak may have already stopped, but the standing water keeps the error active.
- Leaking door seal (door gasket) — The rubber gasket around the door can develop cracks or tears over time, especially if sharp objects have passed through a cycle. Water escapes during the wash or spin phase and runs down into the base tray.
- Loose or split inlet or drain hose connection — The hoses connecting to the back of the machine can work loose due to vibration, or the hose itself can split or perish. A slow drip from a hose connection at the back of the machine will gradually fill the base tray.
- Faulty or blocked drain pump — If the drain pump housing cracks or its seal deteriorates, water can escape around the pump body during draining. A blocked pump that causes pressure to build up can also force water past seals that would otherwise hold.
- Detergent drawer or housing leak — A blocked or cracked detergent drawer housing can cause water to overflow internally rather than flowing into the drum. This water then drips down into the base tray and activates the sensor.
- Damaged tub or drum bearing seal — On older machines, the seal around the drum bearings can wear out, allowing water to seep out of the tub during a wash cycle. This is a more serious fault and usually comes with a rumbling noise during the spin.
Step-by-Step Fix
- 1
Switch off and unplug the machine
Before doing anything else, turn the programme dial to off and unplug the machine from the wall socket. This is essential for safety when water is present near electrical components. Do not attempt to restart the machine until you have found and resolved the source of the leak.
- 2
Remove standing water from the base tray
Pull the machine away from the wall and remove the lower front access panel — it usually unclips or is held by one or two screws. Use dry towels, a sponge, or a wet-dry vacuum to remove all visible water from the base tray. Allow the tray and sensor to dry fully before proceeding; a fan directed into the base speeds this up considerably.
- 3
Inspect the door seal for damage
Open the door and run your fingers around the entire rubber gasket, feeling for cracks, tears, or areas where the seal has pulled away from the drum rim. Pay particular attention to the bottom of the seal where debris tends to collect. If you find a tear, the gasket will need replacing.
- 4
Check all hose connections at the back of the machine
Examine the cold water inlet hose and the drain hose where they connect to the machine and to the wall. Look for moisture, limescale deposits, or visible splits along the hose length. Tighten any loose jubilee clips by hand or with a screwdriver, and replace any hose that shows cracking or bulging.
- 5
Inspect the detergent drawer and housing
Pull the detergent drawer out fully and check the housing inside the machine for limescale build-up or cracks. Rinse the drawer under warm water and clean the housing with a damp cloth. A blocked housing can cause water to overflow internally, so ensure all channels are clear.
- 6
Check the drain pump filter and housing
The pump filter is accessed behind the lower front panel, usually via a small cap on the right-hand side. Place a shallow tray and towels underneath before unscrewing it, as residual water will spill out. Inspect the filter housing for cracks and the filter itself for blockages, then refit securely.
- 7
Run a short test cycle and monitor closely
Once everything is dry and reassembled, plug the machine back in and run a short 30-degree cotton cycle. Stay with the machine throughout and check underneath and behind it at regular intervals. If E23 returns or you see water escaping, stop the cycle immediately and call a service technician.
Affected models
Select your model to see its full troubleshooting page.
When to call a service technician
If you have dried out the base tray and run a test cycle but E23 returns within minutes, there is an active leak that you have not been able to locate. This is the point to stop and call a service technician. Similarly, if you can see water coming from the rear of the drum, from around the drum shaft, or from the pump body itself, these are internal components that require specialist tools and knowledge to replace safely.
A worn drum bearing seal in particular is a labour-intensive repair involving partial disassembly of the machine — attempting this without experience risks causing further damage. If the machine is more than eight to ten years old and the fault lies with the tub or bearings, a technician can also give you an honest assessment of whether repair is cost-effective compared with replacement.
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Frequently Asked Questions
Can I reset the E23 error by just unplugging the machine?
Unplugging the machine will clear the display temporarily, but E23 will return as soon as you run a cycle if there is still water in the base tray or an active leak. You need to dry out the base tray completely and fix the source of the water before the error will stay cleared.
How long does the base tray take to dry out after I remove the water?
At room temperature with good ventilation, the tray and sensor typically dry within one to two hours. Pointing a fan directly into the open base panel can reduce this to around 30–45 minutes. Avoid using a heat gun or hair dryer at close range, as this can damage plastic components.
Is it safe to use the machine while E23 is showing?
No. The machine locks itself out for a reason — running it with an active leak risks water damage to your floor and could create an electrical hazard. Do not attempt to override or ignore the error. Resolve the fault fully before using the machine again.
My machine shows E23 but I cannot find any water in the base — what should I check?
If the base tray appears dry, the sensor itself may be faulty or there may be a very small amount of moisture on the sensor contacts that is not visible. Try drying the sensor contacts gently with a dry cloth. If the error persists with no visible water, the leak sensor or its wiring may need to be tested by a service technician.
How much does it typically cost to fix a Siemens E23 error?
If the fix is simply drying out the base tray after a one-off minor leak, there is no cost at all. Replacing a door seal is a moderate DIY repair if you are comfortable with appliance work, and the part itself usually costs between £20 and £50. A drain pump replacement or drum seal repair carried out by a service technician will typically cost more once parts and labour are included, and prices vary by region and model.