Bosch Dishwasher Repair in Toronto — Won't start / no power

• The single most common true Bosch won't-start is the door latch assembly (genuine 00654621; RepairClinic part 775 and Parts Dr list this exact number as a Bosch dishwasher door latch with the failure reasons 'won't latch' and 'won't start'). On SHE/SHP/SHX/SHV builds the latch carries the micro-switches that tell the control the door is actually closed and that pass power to the controls; when the catch wears or a switch fails open, the board never sees a closed door and the cycle never begins even though the door appears shut. The latch is not repairable -- it's a model-coded assembly swap. We pull the inner door panel, confirm the catch is mechanically tripping the switches and ohm them for continuity before condemning the latch, because a door that's simply out of alignment or a worn strike can mimic a dead switch and that's a zero-part fix.
• When the panel lights but the unit refuses to run and the display posts E06, that's Bosch's door-closure code, not a random fault: the control isn't receiving the closed-and-latched signal from the door switch (boschappliance.support and AppliancePartsPros both document E06 as the door-lock / door-switch fault). The same 00654621 latch/switch assembly is the usual cure, but E06 also throws on a misaligned latch, a worn strike plate, or sagging door hinges that stop the catch fully engaging. We check obstruction, strike wear, and door sag and re-seat the door square first -- an E06 that clears on alignment is a no-part repair -- and only replace the switch assembly when the door closes solidly but the code persists.
• A completely dead panel -- no lights, no response -- on an electronically-controlled Bosch points at the control-board thermal fuse before anything else. The fuse sits on the power module and opens after an overheat or surge event; once it's open the control board gets no power and the machine is stone dead, won't start. It is a model-coded part on the power module, so we identify the correct genuine OEM fuse against the dishwasher's model/serial data plate rather than carrying a single number blind. We meter it for continuity at the board, and -- critically -- we look for WHY it opened (a tiring flow-through heater or a chafed harness) rather than just dropping a fuse in, because a fresh fuse on an unaddressed overheat just blows again.
• Lights-on-but-nothing-happens with the fuse and latch both testing good is the programmed control board / power module itself -- the last suspect, not the first. The Bosch power module (genuine programmed control board 12009532, also 12009539 on sibling builds; Reliable Parts and the official bosch-home.com product page list it as the OEM module that runs wash, drain and dry) regulates start and won't fire the cycle if it's failed. It's frequently swapped by mistake when the real fault is the thermal fuse, door latch, or a wiring fault upstream, so we only condemn the model/serial-coded board after the fuse, latch, harness, and control-lock checks come back clean -- honest sequencing keeps a $150+ board out of a quote a fuse or latch would have fixed.
• The false no-start we rule out before touching any part is the child-lock / control-lock: when the lock symbol is lit, every button is disabled and Start does nothing, so the owner reads a dead machine. It clears by pressing and holding the designated lock pad for roughly 3-5 seconds until the padlock/key icon goes out (Bosch owner support). We also confirm a Delay Start / timer wasn't set, since a queued delay looks identical to a no-start. Both are zero-part education fixes and the most over-called 'broken Bosch' on this symptom.
• A Bosch that powers up, accepts the cycle, but never fills -- drain pump may run, no water enters -- is the AquaStop water-safety lockout, not a control failure: if the AquaStop has tripped (red flag visible in the hose-connector window) or the inner pressure hose has split, the safety valve cuts the supply at the tap and the machine sits without water and won't proceed. The AquaStop is a SEALED, single-use, non-repairable unit, so the whole hose/valve assembly 00674387 (AP4434735; genuine Bosch OEM, fits Bosch/Thermador/Gaggenau) gets replaced as a unit when the valve is the fault. We first check the tap is fully open and the inlet/AquaStop screen isn't scaled shut (zero-part fixes) before quoting the assembly -- and we listen for the valve click on start to tell a stuck valve from a closed supply.
• A no-start that started right after a power event -- surge, breaker trip, or the unit unplugged for a reno -- is often just a latched controller, not a failed part. The fix Bosch documents is a hard reset: kill power at the breaker (or unplug) for about 5 minutes so the power module fully discharges and reboots, then restore and retry. We run this reset on every dead-panel call before parts because a controller that comes back to life on a reset is a no-charge diagnosis, and it also tells us whether the fuse and board are actually healthy before we open the door.

Bosch won't start / no power in Toronto — the local specifics

• The recurring Toronto pattern on Bosch won't-start is that the door tells the story: the most common causes are the latch/switch (00654621) or an E06 door-closure fault, and a notable share of those are not a failed switch at all but a door knocked out of square or a worn strike after a condo kitchen reno -- a re-align, not a part. The other recurring bucket is a stone-dead panel that traces to the control-board thermal fuse after a surge or breaker event on older Toronto circuits, where we reset first and replace only when the fuse reads open.
• We carry the high-probability won't-start part to these Toronto calls: the door latch assembly 00654621, plus a strike/alignment kit so a misaligned-door E06 is fixed on the spot with no part. For a stone-dead panel we identify the model-coded control-board thermal fuse against the data plate before sourcing it. We bring an AquaStop hose assembly 00674387 when the symptom is powers-up-but-won't-fill, and we confirm the power-module number (12009532-family) against the data plate before ordering rather than carrying a board blind.

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 won't start / no power guide.