Bosch Washing Machine Repair in Toronto — Door or lid won't lock or open

• A Bosch 24" compact that powers up, accepts the program, but never starts because the door won't confirm locked is the PTC-interlock fault, not a board failure. The genuine part on the 300/500/800-series (WAT/WAW builds) is the Bosch door lock/switch 10000916 (supersedes 00635514 / 4579938; cross-referenced AP6031021 / PS11766558; PartsOfCanada lists fitment to WAT28400UC, WAW285H1UC and WAW285H2UC). This is a thermal PTC bi-metal lock, not a plain solenoid: a resistor heats a bi-metal strip that drives the lock pin and only then passes power through to the rest of the machine, so a healthy lock takes a second or two to confirm. We meter the lock at the connector before condemning it, because a lock that drives the pin but never closes the common-to-rest circuit reads identically to a board fault at the panel.
• The single most-missed won't-lock cause on these Bosch front-loaders is a carbonised wiring block at the lock itself. Per the published interlock teardown (whitegoodshelp / how-to-repair), the lock's live-to-common contact points carbonise and the terminal block overheats and burns from a loose spade connector, so the pin physically locks but power never passes through to start the cycle. We inspect the lock's terminal block and harness spades for browning and melt before ordering anything, because a burnt connector reads at the panel exactly like a dead lock but is a re-terminate, not a 10000916 swap.
• On the European-platform Bosch front-loaders the won't-lock part is the ROLD DKS-series interlock 00627046, which is superseded by the current 00638259 (genuine Bosch/Siemens ROLD type DKS67A, confirmed at eSpares / 4ourhouse / spares-online as the live replacement for 627046 / 637590 / 623782). We confirm the live supersession by model and serial before ordering, because the same cabinet ran more than one lock body across the build and fitting a discontinued original-release number can re-throw the fault.
• Won't-lock on the legacy and Axxis-era Bosch washers is the genuine electric door interlock 00610147 (confirmed at PartsDr / ReliableParts / RansomSpares as an OEM Bosch electric lock fitting Bosch/Thermador/Gaggenau plus the Siemens/Neff siblings). It carries the same lock-then-pass-power delay, so an owner who reports the door clicks but the cycle never begins is describing a lock that energises but never confirms. We order this one strictly by model/serial because the legacy bodies are not interchangeable with the modern 10000916.
• The door-lock latch and strike are the mechanical half of the won't-lock fault, and they are the part techs skip when they fixate on the electrics. The genuine latch is the Bosch door lock latch 00648526 (replaces 1561173; cross-referenced AP4501425 / PS8730790 / EAP8730790), and on full door-lock-assembly jobs the OEM unit is 00612148 (genuine Bosch OEM door lock assembly, white, confirmed at PartsDr / Amazon; replaces 00611090 / AP4355295 / PS8727513). When the plastic hook or catch cracks or the spring tires, the latch pin has nothing solid to bite, so the door closes but never seats and the cycle won't arm even with a healthy PTC lock. We confirm the hook springs back and aligns to the lock body before condemning the interlock.
• An E18 (also shown as F18) is a won't-lock complaint that is really a drain fault: Bosch front-loaders keep the door locked whenever water is sensed in the drum, so a drain timeout leaves the door clamped shut and the owner reports it as 'won't unlock' (confirmed on iFixit's E18 guide, Bosch official support, and JustAnswer). The first move is never a lock part: we slow-open the pump-cover trap/coin filter behind the lower flap, clear the debris (coin, bra wire, lint slug) and drain the residual water, after which the interlock releases on its own. We never force the door on an E18, because forcing it cracks the very latch (00648526) that was working fine.
• A bulging or perished door boot and a simple Child Lock are the two cheapest won't-lock causes, and both are no-part fixes. An over-stuffed load or a swollen lower boot fold stops the door pulling fully home so the strike never reaches the latch; we redistribute the load and inspect the boot before quoting an interlock. Separately, a 'CL' or key icon on the panel is the Child Lock holding the controls (not a lock fault at all) and clears by holding the documented button combination for a few seconds. We rule out load, boot swell and Child Lock first, because each one mimics a failed lock at the display.

Bosch door or lid won't lock or open in Toronto — the local specifics

• The recurring Toronto pattern on a Bosch won't-lock call is that the symptom splits two ways before any lock part is justified: a genuine PTC-interlock or carbonised wiring-block fault that meters out at the lock, versus a door clamped shut by an E18 drain timeout with water still in the drum. We see the second case constantly in stacked condo closets, where a coin or bra wire in the pump trap holds the door locked and the owner reads it as a broken lock; clearing the trap releases it with no lock part at all.
• We carry the Bosch door lock/switch 10000916 (with AP6031021 / PS11766558 cross-references) and the door-lock latch 00648526 to these calls, plus the legacy electric interlock 00610147 when the model/serial points at an Axxis-era build, and a meter to confirm the PTC and check the terminal block for carbonising before any part goes in. For the E18-clamped-door version we bring the pump-trap kit, not a lock.

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 door or lid won't lock or open guide.