Bosch E17 fault codewhat it means and how to fix it
Water supply time exceeded. Bosch name the AquaStop hose filter as a cause, which is a Bosch-specific part most owners do not know they have.
Take care
What E17 means
Bosch use E17 when the machine asked for water and did not receive enough within the time it allows. Their own guidance names three causes: filters in the water connection blocked, the AquaStop hose blocked, or the supply pressure being too low. That middle one is worth dwelling on because it is particular to this manufacturer. Many Bosch machines are supplied with an AquaStop inlet hose, which is not a plain rubber pipe but a hose with a valve and a sensor built into the connector at the tap end. It exists to shut the water off if the hose fails, and it contains its own filter. Owners who know to clean the little gauze screen where the hose meets the machine often do not know there is anything at the tap end at all. Siemens give a usefully concrete figure for the pressure check on the equivalent code: roughly ten litres a minute from a fully open tap. That turns a vague instruction into something you can actually test with a bucket and a watch.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| Tap not fully open | The free one, and worth eliminating first. Behind-the-machine taps get knocked when things are stored under the counter. | Common |
| Inlet filter blocked | The gauze screen where the hose meets the machine, silted with grit from the mains. Standard on every machine and usually the answer. | Common |
| AquaStop hose blocked or triggered | Bosch-specific. The safety hose has its own filter at the tap end, and if the AquaStop valve has tripped it will not pass water at all. | Occasional |
| Mains pressure too low | Bosch cite low supply pressure directly. Siemens quote roughly ten litres a minute from a fully open tap as the benchmark to test against. | Occasional |
What to try yourself
Check the tap is fully open — all the way off and all the way on again, rather than trusting how it looks.
Turn the tap off and unscrew the hose at the machine end into a bucket. Look for the gauze filter in the connector and rinse it until you can see light through it.
Turn the tap off first and have a towel down. There is always more water sitting in the hose than you expect.Test the flow while the hose is off. Time a two-litre jug from the open tap: Bosch and Siemens are looking for roughly ten litres a minute, so anything over about twelve seconds a jug is marginal.
If your hose has a bulky plastic housing at the tap end, that is an AquaStop hose. Check the filter at that end too, and look for a red indicator in the small window — if it has tripped, the hose needs replacing rather than cleaning.
Reconnect finger tight plus a quarter turn. These seal on a rubber washer, and overtightening splits the housing.
Get a qualified appliance engineer to look at your Bosch E17
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What it costs to fix
Typical repair cost
£0–£150
Time on site
30 minutes
Usually free — a tap, a filter or a kink. A replacement AquaStop hose is roughly £25 to £45. An inlet valve is around £90 to £150 fitted.
Typical UK prices including parts and labour, updated August 2026. Your quote may differ.
What other owners found
Nobody has shared what worked for them on this code yet. If you have had it, you would be the first — and it genuinely helps the next person.
Related Bosch fault codes
- 4EGet it checkedThe machine asked for water and did not get enough in the time allowed. Nine times out of ten the answer is at the tap rather than inside the machine.Related: water fill and supply
- IEGet it checkedThe drum did not fill to the level it wanted in the time allowed. LG treat IE and 1E as the same code, so you do not need to tell them apart.Related: water fill and supply
- E10Get it checkedA water supply fault, one beep on a machine with no display. The manufacturer gives a pressure range you can actually test against.Related: water fill and supply
Common questions about Bosch E17
What is an AquaStop hose and do I have one?
It is a Bosch safety inlet hose with a valve built into the tap-end connector, designed to shut off the water if the hose bursts. If the fitting at the tap end is a chunky plastic box rather than a plain brass nut, you have one. It contains a filter that owners rarely know about.
Can I replace an AquaStop hose with an ordinary one?
You should not. The machine is designed around having that protection, and a plain hose removes it. They are widely available as a Bosch part and it is not an expensive item.
F17 and E17 — which do I have?
Both, in effect. As with E18 and F18, the prefix reflects the display rather than the fault. Bosch and Siemens both document these as the same code.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer support portal
Checked by Appliance technical reviewer (Qualifications to be displayed on appointment) on 5 August 2026.