Bosch Dishwasher Repair in Toronto — Not filling with water

• A Bosch that powers up, accepts the cycle, runs the drain pump but never admits water and posts E18 is signalling Bosch's low-water-level fault — not a control failure. E18 is the genuine BSH fill code (bosch-home.com documents it as 'low water level'): the control timed the inlet solenoid open but the expected water volume never arrived, so the machine stalls before wash. Bosch's own troubleshooting points at three supply-side checks first — a tap that isn't fully open, a kinked supply hose, and a scaled inlet screen — every one a zero-part fix. We work those before we ever quote a valve, because an E18 that clears on a cleaned screen or an opened tap is a no-part repair.
• The single most common no-fill on AquaStop-equipped Bosch is the sealed AquaStop hose/valve assembly itself (genuine OEM 00674387; PartSelect PS8733523, AppliancePartsPros AP4434735, fits Bosch/Thermador/Gaggenau/Kenmore). The AquaStop is a hose-within-a-hose with the solenoid valve integrated at the tap end; when that solenoid fails to open — or the safety has latched after a prior leak — no water enters and the unit sits dry on E18. We treat the AquaStop assembly as sealed and single-use: once the solenoid is dead or the safety has fired, we replace the whole 00674387 unit rather than attempt a blind reset, because resetting without finding the leak just re-trips. We listen for the valve click on start and meter the solenoid coil before condemning it, since a closed tap or a tripped flag mimics a dead valve.
• On non-AquaStop SHE/SHP/SHX builds, the no-fill part is the standalone water inlet valve 00628334 (genuine Bosch OEM; replaces 9000655808 / 3278459, current number 10023852, cross AP5691117 / AP7193108 / PS8729241). The solenoid valve admits supply water during fill; when the coil won't open or the valve sticks shut on scale, the tub never fills and E18 stores. This is the same 00628334 the module flags on the leaking and dishes-dirty sides — but the failure mode here is distinct: there it cracks and weeps (E15) or won't open to full fill (weak wash), here it won't open at all. We ohm the coil and confirm supply pressure at the valve before swapping, because a partly-closed tap reads identically to a dead valve.
• A no-fill where the screen is the culprit is the most over-called 'broken valve' on Bosch. The AquaStop carries a removable inlet filter screen at the tap connection; on Toronto's hard water it scales and silts shut, choking the fill the control's flow meter expects and tripping E18 even though the valve and solenoid are perfectly healthy. We pull and flush the screen as the first move — a cleaned screen that restores fill is a zero-part fix — and only move to the 00674387 assembly or 00628334 valve when a clean, unobstructed screen still won't pass water.
• An E18 with a fully open tap and a clean screen is a true supply-pressure or flow fault, not a dishwasher part. Bosch's fill logic times the inlet solenoid against the flow meter (impeller) count and needs the supply to deliver roughly 10 L/min at the fully open tap (per Bosch service literature and AquaStop flow specs — the AquaStop hose itself only passes water at about 2.5 L/min, and it needs that ~10 L/min available at the tap to do it); an undersized or half-seized angle stop, a kinked or crushed supply hose behind the cabinet, or genuinely low house pressure starves the fill and stalls the cycle on E18. We measure flow at the tap and inspect the hose run before quoting any valve — a kinked hose or a barely-cracked shutoff is a no-Bosch-part fix that a new valve would never have cured.
• A no-fill that started right after a prior leak event is the AquaStop safety having latched, not a fresh valve failure. If the AquaStop tripped — water reached the base tray and the float parked the machine, or the inner pressure hose split and ran water down the jacket — the safety valve cuts supply at the tap and the unit will not refill until the fault is found and the assembly renewed. The trip is visible as a red flag in the hose-connector window. We confirm whether the AquaStop has fired (and check the base-tray float switch 00165256 resets freely) before condemning the fill side, because resetting a latched AquaStop blind without finding the leak just re-trips it.
• The false no-fill we rule out before any part is the control-lock / delay-start and a partly-closed supply, which together account for most 'won't fill' calls that aren't broken at all. A queued Delay Start looks identical to a dead machine, the child-lock disables Start, and a service or angle valve left only a quarter-open after a renovation starves the fill enough to throw E18. We clear the lock (press-and-hold the lock pad ~3-5 seconds), confirm no delay is queued, and open the tap fully — all zero-part education fixes — before opening the door to anything.

Bosch not filling with water in Toronto — the local specifics

• The recurring Toronto pattern on Bosch no-fill is that E18 is far more often a starved supply than a dead valve: hard-water scale on the removable AquaStop inlet screen, a half-open angle stop left after a kitchen reno, or a kinked supply hose behind a tight condo install. The genuine valve and AquaStop failures are real but the minority — so the honest first move on nearly every Bosch E18 here is the screen, tap and hose check, and we routinely close these calls with no part when the screen flushes clean and fill returns.
• We bring the AquaStop hose/valve assembly 00674387 and the standalone inlet valve 00628334 (matched to the unit's AquaStop vs non-AquaStop build off the data plate), plus the base-tray float switch 00165256 for the latched-safety case, and the tools to pull and flush the scaled inlet screen on the spot — because on Toronto water that screen clean is the most likely fix and resolves the call without a part more often than not.

For the full Bosch dishwasher module — every fault, part number and code — see Bosch dishwasher repair in Toronto, and for the same fault across all brands the dishwasher not filling with water guide.