What to check first
Can I keep using it?
Do not keep using the appliance while this warning is active.
Do not keep running the appliance when water is visible, a leak warning is active, or water could reach wiring or controls.
- Safe next step
- Stop the cycle if safe, turn off water when appropriate, protect the floor, and avoid repeated resets until the leak source is understood.
- Stop when
- Water is near wiring, cabinetry is getting wet, the leak returns, or the source is not safely visible.
Do not keep using the appliance if the code points to voltage, wiring, control power, burning smell, smoke, or a possible miswired supply.
- Safe next step
- Use only safe owner-level power checks, then involve a qualified technician or electrician when the source points to wiring or supply voltage.
- Stop when
- Breakers trip, lights dim, the appliance smells hot, wiring may be miswired, or the warning returns after a safe reset.
Safety boundaries
Safe first
- Match the exact brand, appliance type, and displayed code first.
- Use the model manual as the final authority for access steps.
- Stop and address visible water before retrying the appliance.
- Disconnect power before any service-access step.
Do not do this
- Do not keep running the appliance while this code is active.
- Do not disconnect inlet hoses until the water supply is off.
- Do not bypass locks, float switches, leak sensors, or other safety systems.
Common causes include
- Bent or kinked water-supply hose
- Closed, jammed, or calcified water tap
- Clogged filter at the water inlet
Basic checks
- Confirm the dishwasher water tap is fully open; if it is jammed or flow seems weak, stop and contact a plumber.
- Inspect the visible supply hose for bends, kinks, or crushing without disconnecting it.
- Use the exact model manual before touching an inlet filter or AquaStop connection.
- Watch one fill attempt from nearby only after the tap and visible hose are normal; stop if little water enters or a leak appears.
Reset or retry steps
- Retry once only after a closed tap or visible hose restriction has been safely corrected.
- Do not keep restarting the dishwasher when E18 returns or incoming flow remains weak.
When to call a technician
- Call Siemens service if E18 returns with the tap open and the visible supply hose unobstructed.
- Contact a plumber for a jammed tap or weak household supply; use Siemens service for an appliance-side inlet fault.
Before approving a paid visit, check warranty status and reviewquestions to ask before repair.
FAQ
What does Siemens Dishwasher code E18 usually mean?
Siemens documents E18 as restricted incoming water at the hose, tap, or inlet filter. Model context matters: Siemens Home Ireland lists E18 as a water-inlet fault and notes that its codes and actions may not apply to every dishwasher.
Can I keep using the dishwasher with code E18?
Do not keep using the appliance until the visible issue has been checked and the relevant safety warnings have been addressed. Turn off the water tap and disconnect power before any hose or inlet-filter access allowed by the model manual.
When should I call a technician for Siemens E18?
Call Siemens service if E18 returns with the tap open and the visible supply hose unobstructed. A qualified technician may check Supply hose, Inlet filter, and Water inlet valve against the model's service information before treating any part as failed.