Bosch Dryer Repair in Toronto — Tripping the breaker / blowing a fuse

• Platform first, because "trips the breaker" is a different repair on each Bosch dryer family and the part numbers do not cross over. On the VENTED Axxis machines (WTV76100US / WTA-series) a hard, repeatable trip the moment heat is called is a heating-element assembly that has shorted to its own housing: the nichrome coil sags or fractures and contacts the metal heater can, creating a direct path to chassis ground that the panel 30A double-pole can't hold. The cure is the 00649017 heating-element assembly (AP4511161 / PS8730894; ships with its integrated thermistor and thermoregulator). On the ventless WTG86 / heat-pump WTW87 / WQB245 platforms there is no resistance element, so the same complaint is the sealed compressor circuit instead — we confirm the platform by serial before quoting.
• The confirming test, not a guess: we ohm each heating-element terminal to the case. Any continuity to ground on the 00649017 means the element is shorted to the housing and is what's tripping the panel — replace it. A clean element that reads open or proper resistance with NO continuity to ground sends us upstream to the power cord and terminal block instead. RepairClinic's Bosch-specific tripping-breaker guidance puts the order exactly this way: weak breaker, then shorted element/assembly, then power-cord/terminal-block, before anything mechanical — and we work it in that sequence rather than selling a $270 element on a hunch.
• A shorted heating circuit also writes itself to the display: Bosch logs the heating-circuit fault as E06 (official bosch-home.com error-code literature documents E06 as a malfunction in the heating circuit — a short, open, or irregular current the control trips on to protect itself). An Axxis throwing E06 AND popping the breaker the instant the heat cycle starts is the classic shorted-00649017 picture; we read the code, then confirm with the continuity-to-case test before condemning the element, because E06 can also be a dead thermistor or harness fault that does NOT trip a breaker.
• A breaker that trips a few minutes IN — not at startup — with the element testing clean is usually a restricted-exhaust overheat, not a dead short. On the vented Axxis the 175F manual-reset high-limit thermostat 00422272 (PS8713233; red reset button on the back) opens on overheat, but a lint-packed vent run drives the heater hot enough to also nuisance-trip a tired breaker before the limit settles it. We clear the duct FIRST; a 00422272 that re-trips after reset means the airflow path is still blocked, so swapping the safety without clearing the vent just cooks a second one. This is an airflow root cause masquerading as an electrical fault.
• Loose or burnt connections at the terminal block are a real and dangerous trip source that no part number fixes by itself: when the power-cord lugs aren't torqued tight to the block, the joint arcs, heats, and shorts — restricting current and overheating the breaker until it trips, with scorch marks at the block the tell. We inspect and re-land the cord to spec, replace a pitted block or a burnt cord, and never just reset and walk; an arcing terminal block is a fire path, not a nuisance trip.
• Drum free-wheels, element clean, cord clean — then the last electrical suspect is a shorted drive motor 00436441 (the Nexxt 500-series motor that also carries the blower wheel on its shaft). A winding that has shorted internally draws excess current and trips the panel, and because airflow and rotation share one shaft a true motor short usually pairs the trip with a hum-and-no-tumble. We meter the motor for a shorted winding and continuity to frame before condemning it — but per the documented cause order, the motor is checked AFTER the breaker, element, cord and terminal block come back clean, never first.
• Heat-pump WTW87 (WTW87NH1UC) / WQB245 (WQB245AXUC) breaker trips are the specialist case and a different machine entirely: there is no resistance element to short, so a hard trip points at the SEALED refrigerant circuit — a shorted or locked-rotor compressor or its starting components — which Bosch flags as F:06 (heating-circuit / over-temperature-of-compressor on these models). That is EPA-608 sealed-system diagnosis, not a parts swap, and we say so up front rather than chasing a heating element that this platform does not have.

Bosch tripping the breaker / blowing a fuse in Toronto — the local specifics

• The recurring Toronto pattern on Bosch tripping-breaker calls is the vented Axxis (WTV76100US) that pops the panel the instant the heat cycle starts — a heating element shorted to its own housing, usually confirmed with an E06 on the display and continuity-to-case on the meter. The second pattern is the relocation trip: a Bosch carried between an older 3-prong outlet and a newer 4-prong one with the neutral-ground bonding strap left in the wrong state, which reads like a dead machine but is a terminal-block configuration fix, not a part. We see both far more than a shorted drive motor.
• We roll to these calls with the 00649017 heating-element assembly (vented Axxis — shorted-to-ground is the lead cause), the 00422272 high-limit thermostat for the restricted-vent overheat trips, and a meter to run the continuity-to-case test plus check the terminal block and the 3-wire/4-wire bonding strap before we ever quote a part — so a no-part install fix or an arcing terminal block is caught on the first visit instead of a parts swap.

For the full Bosch dryer module — every fault, part number and code — see Bosch dryer repair in Toronto, and for the same fault across all brands the dryer tripping the breaker / blowing a fuse guide.