Bosch Washing Machine Repair in Toronto — Leaking water

• E23 (shown as F23 on some panels — Bosch's own support page confirms the two are identical) is the leak code that fronts almost every Bosch washer leaking-water call. It is the AquaStop float switch in the plastic base tray tripping: water has collected under the drum, the float lifts, the machine locks down, refuses to fill, and may run the drain pump continuously as a safety dump. E23 is a SYMPTOM, not a part — it tells you the base is wet but not where the water came from. The job is tilting the unit forward to drain and dry the tray, then chasing the actual leak (boot, pump cover, hose, or sump) before resetting, because resetting without fixing the source just re-trips the float the moment water returns.
• On the 24" front-loaders the single most common true leak source is a torn door boot gasket — genuine part 00772658 (PS11732288; fits WAT28400UC, WAS24460UC, WAP24200UC). Overloading is the documented cause: a stuffed drum folds the lower seal and either tears the rubber at the bottom fold or lets water track past the door, which then drips into the base and triggers E23. We inspect the lower-front quadrant of the boot with a flashlight (that is where the tear hides) and replace the boot rather than chase the AquaStop code.
• The pump-cover trap is the leak hiding in plain sight: the cleanable drain-pump filter/coin-trap cap is part 00647920 (PS11704964 / AP5972227; supersedes 00605010). Owners pull it to clear an E18 drain timeout, then cross-thread or under-seat it on the way back, and it weeps from the lower-right kick-flap on every drain phase — which then pools in the base and throws E23. We demonstrate seating it correctly (and check the O-ring), so the same call doesn't recur. A perished filter-cap seal gets the new 00647920 rather than a guess at the pump.
• When the leak is during the FILL rather than the drain, it is the water inlet valve (00606001) on the AquaStop-equipped front-loaders, or the inlet-hose connection at the back. A cracked valve body or a hardened O-ring at the tap end weeps under line pressure even when the machine is idle, and Bosch's AquaStop hose has a double wall with its own safety valve — if that hose float trips it cuts water at the tap. 00606001 is a genuine Bosch dual inlet valve (supersedes 00617612), but it is not universal: many WAT28400UC date-code variants instead use the magnet inlet valve 00635399 (PS11724591), so we read the E-Nr/FD code off the rating plate and confirm the exact valve SKU before ordering. We pressure-check the valve and the hose coupling before condemning either.
• A leak that shows only on the spin/drain and originates low-center is the sump hose / tub-to-pump hose clamp, confirmed by AppliancePartsPros and RepairClinic as a recurring Bosch leak path. The spring clamp on the corrugated hose between the outer tub and the EcoSilence drain pump loosens or the hose chafes, so water sheets out under the pump housing during the high-flow drain. We re-clamp or replace the hose; only a pump with a cracked volute or a leaking shaft seal actually gets the drain pump 00145753 (PS11704552; replaces 00144844 / 00144977).
• Soapy water at the front-top from the detergent drawer is a dispenser-siphon leak, not a seal failure. Mould and detergent crust block the siphon tube and softener-cap, so the compartment overflows and runs down the front of the cabinet during fill — it reads to the owner as 'the machine is leaking.' The fix is pulling and clearing the drawer and siphon cap (a maintenance habit, not a SKU); we test it by pouring water into the softener cup until it siphons clean, then educate the owner so it stays clear.
• A weeping leak that also won't let the cycle start can be a door-latch problem masquerading as a seal issue: if the door lock/interlock (10000916, PS11766558 / AP6031021) doesn't pull the door tight, the boot doesn't compress evenly and the upper seal can weep on a full drum. We confirm the latch pulls the door square against the boot before condemning the gasket — a tired interlock that under-clamps the door mimics a torn seal.

Bosch leaking water in Toronto — the local specifics

• The recurring Toronto pattern is an E23/F23 'leak' that the owner read online as a dead AquaStop sensor, when it is really a torn lower door boot from overloading a small 24" drum, or a pump-cover trap that was pulled to clear a drain timeout and not re-seated. In stacked condo closets the base tray hides the standing water, so the float keeps re-tripping until the actual source is found and dried — and we routinely catch a too-tight pump-filter cap or a chafed sump hose that a code-only diagnosis would have replaced as a pump.
• We bring the door boot gasket 00772658 (PS11732288), the cleanable pump-filter/coin-trap cap 00647920 (PS11704964) with a spare O-ring, the AquaStop-equipped inlet valve (00606001, with the 00635399 magnet-valve variant confirmed against the rating-plate E-Nr before the visit), and the EcoSilence drain pump 00145753 (PS11704552) — plus floor protection and a wet-vac for the base tray, since clearing and drying the AquaStop pan is step one on every Bosch leak call.

For the full Bosch washing machine module — every fault, part number and code — see Bosch washing machine repair in Toronto, and for the same fault across all brands the washing machine leaking water guide.