Bosch E17
Water Inlet Error
Low severityExpert Guide
SeverityLow
What Your Machine Is Actually Telling You
E17 means the pressure switch measured a water level above the maximum safe threshold. The drum has more water than the selected cycle requires, and the board stopped the cycle to prevent overflow.
Why would the drum overfill?
1. Leaking inlet valve (40%) — the solenoid valve that controls water entry is stuck partially open. Even with no electrical signal, a worn valve gate or degraded rubber diaphragm lets water seep through. You may notice the drum slowly fills with water even when the machine is off.
2. Pressure switch failure (20%) — the pressure switch itself is reading low (telling the board there's less water than there actually is), so the board keeps filling.
3. Pressure switch air tube blocked (15%) — a clogged or kinked air tube gives a false low reading.
4. Siphoning (15%) — the drain hose is positioned incorrectly, allowing water from the plumbing to flow back into the machine.
5. Board failure (10%) — the fill valve relay is stuck closed (powering the valve continuously).
The silent test: If you come home and find water in the drum when the machine hasn't been running — the inlet valve is leaking. This is dangerous because it can overflow and flood your floor. Turn off the taps whenever the machine is not in use until the valve is replaced.
Bosch Aquastop connection: On Aquastop-equipped models, a leaking valve *should* be caught by the Aquastop system. If E17 appears despite having Aquastop, the leak is past the Aquastop valve (inside the machine), not in the hose.
Why would the drum overfill?
1. Leaking inlet valve (40%) — the solenoid valve that controls water entry is stuck partially open. Even with no electrical signal, a worn valve gate or degraded rubber diaphragm lets water seep through. You may notice the drum slowly fills with water even when the machine is off.
2. Pressure switch failure (20%) — the pressure switch itself is reading low (telling the board there's less water than there actually is), so the board keeps filling.
3. Pressure switch air tube blocked (15%) — a clogged or kinked air tube gives a false low reading.
4. Siphoning (15%) — the drain hose is positioned incorrectly, allowing water from the plumbing to flow back into the machine.
5. Board failure (10%) — the fill valve relay is stuck closed (powering the valve continuously).
The silent test: If you come home and find water in the drum when the machine hasn't been running — the inlet valve is leaking. This is dangerous because it can overflow and flood your floor. Turn off the taps whenever the machine is not in use until the valve is replaced.
Bosch Aquastop connection: On Aquastop-equipped models, a leaking valve *should* be caught by the Aquastop system. If E17 appears despite having Aquastop, the leak is past the Aquastop valve (inside the machine), not in the hose.
What You're Probably Seeing Right Now
- Water level in the drum is visibly higher than normal through the door glass.
- You found water in the drum when the machine was off — it filled by itself.
- The machine stopped mid-cycle with E17 — it detected overfill during the wash.
- The drain pump keeps activating — the board is trying to pump out the excess water.
- You hear water slowly trickling into the drum when the machine is idle and taps are open.
DIY Fix — From Easiest to Hardest
1
Turn Off the Taps Immediately (30 seconds)
**First priority:** Close both water supply taps behind the machine.
If the inlet valve is leaking, water continues to enter the drum as long as the taps are open — even with the machine turned off. This can lead to flooding.
If the inlet valve is leaking, water continues to enter the drum as long as the taps are open — even with the machine turned off. This can lead to flooding.
2
Check the Drain Hose Position (2 minutes)
Rule out siphoning:
1. The drain hose loop should be **60-100cm** above floor level.
2. The hose should **not** be pushed more than 15cm into the standpipe.
3. If too low, water from the drain can flow back in.
**Fix:** Raise the hose loop and secure it.
1. The drain hose loop should be **60-100cm** above floor level.
2. The hose should **not** be pushed more than 15cm into the standpipe.
3. If too low, water from the drain can flow back in.
**Fix:** Raise the hose loop and secure it.
3
The Off-Machine Fill Test (10 minutes)
**Critical test — is the valve leaking?**
1. Run a drain cycle to empty the drum.
2. Turn the machine **off** (power button).
3. Leave the taps **open.**
4. Wait **30 minutes.**
5. Check the drum — if water has accumulated, the **inlet valve is leaking.**
**If water appeared:** Turn off taps and plan for valve replacement.
**If dry:** Valve is fine. The issue is pressure sensing, siphoning, or board-related.
1. Run a drain cycle to empty the drum.
2. Turn the machine **off** (power button).
3. Leave the taps **open.**
4. Wait **30 minutes.**
5. Check the drum — if water has accumulated, the **inlet valve is leaking.**
**If water appeared:** Turn off taps and plan for valve replacement.
**If dry:** Valve is fine. The issue is pressure sensing, siphoning, or board-related.
4
Check the Pressure Switch Air Tube (10 minutes)
If the valve doesn't leak but E17 appears during cycles:
1. Unplug machine. Remove top panel.
2. Find the **pressure switch** — a round plastic disc with a thin tube leading down to the tub.
3. Check the tube for **kinks, cracks, or blockages.**
4. **Blow gently** into the tube — you should hear a click from the pressure switch.
5. If no click — switch is faulty.
6. If blocked — clear with compressed air or replace the tube.
**Water in the tube** (from condensation or suds) can also cause false readings.
1. Unplug machine. Remove top panel.
2. Find the **pressure switch** — a round plastic disc with a thin tube leading down to the tub.
3. Check the tube for **kinks, cracks, or blockages.**
4. **Blow gently** into the tube — you should hear a click from the pressure switch.
5. If no click — switch is faulty.
6. If blocked — clear with compressed air or replace the tube.
**Water in the tube** (from condensation or suds) can also cause false readings.
5
Replace the Inlet Valve (20 minutes)
If the valve is confirmed leaking:
1. Turn off taps, unplug machine.
2. Remove top panel and/or back panel.
3. Disconnect hoses from the valve (inside the machine).
4. Disconnect electrical connector.
5. Remove valve mounting screws (2-3).
6. Install new valve — order using your **E-Nr.**
7. Reconnect all hoses and wiring.
8. Test — run a short cycle and verify water level stays correct.
1. Turn off taps, unplug machine.
2. Remove top panel and/or back panel.
3. Disconnect hoses from the valve (inside the machine).
4. Disconnect electrical connector.
5. Remove valve mounting screws (2-3).
6. Install new valve — order using your **E-Nr.**
7. Reconnect all hoses and wiring.
8. Test — run a short cycle and verify water level stays correct.
6
After Repair — Always Close Taps (Habit)
**Bosch recommends** closing the water supply taps after every wash cycle. This:
1. Eliminates flood risk from valve leaks.
2. Reduces pressure on hose connections.
3. Extends the life of the Aquastop system.
**Quarter-turn ball valves** ($8-15) make this easy — one quick turn instead of multiple screw turns.
1. Eliminates flood risk from valve leaks.
2. Reduces pressure on hose connections.
3. Extends the life of the Aquastop system.
**Quarter-turn ball valves** ($8-15) make this easy — one quick turn instead of multiple screw turns.
When to Call a Pro
- •Valve confirmed leaking — urgent replacement to prevent flooding. Valve replacement: $120-$250 installed.
- •Pressure switch failed — false low readings causing overfill. Replacement: $100-$200.
- •Board fill relay stuck — continuously powers the valve. Board repair: $150-$400.
- •Flooding has already occurred — check for water damage to flooring.
What It'll Cost You
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