What to check first
Stop normal operation while this warning is active. Follow only the documented safe checks or protective-drain instructions for the exact model.
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.
Applicability
Regional guidance · Siemens dishwashers with a digital display · Ireland
This meaning comes from the Siemens Home Ireland code library; confirm the exact E-number manual before inlet-filter work because hose systems and owner access differ by model and market.
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.
Can I keep using it?
Stop normal use when water is visible or a leak warning is active. Stay clear if water could reach wiring or controls.
- Safe next step
- Follow the code-specific shutdown or protective-drain instructions, turn off water when appropriate, and avoid repeated resets. Do not interrupt a documented protective-drain sequence just to clear the display.
- 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 continue normal cycles while this code is active; any protective-drain sequence must follow the exact model instructions.
- 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
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?
Stop normal operation until the issue and safety warnings have been addressed. Follow only the documented safe checks or protective-drain instructions for your model. 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.