Bosch Dryer Repair in Toronto — Not heating

• Diagnose the platform first — "not heating" means three different repairs on a Bosch. On the older VENTED Axxis machines (WTV76100US / WTA-series) it is a true resistance heater: a dead element throws E06 (heating-circuit fault) and the cure is the 00649017 heating-element assembly, which ships with its own thermistor and thermoregulator integrated. On the ventless WTG86 / heat-pump WTW87 / WQB245 platforms there is NO resistance heater to replace, so the same complaint is almost always an airflow or drainage maintenance issue, not a part.
• Vented Axxis no-heat with the element still good: check the manual-reset HIGH-LIMIT THERMOSTAT (00422272) on the blower/heater housing — it is a 175° limiter with a red reset button on the back. If it has tripped, the root cause is a restricted exhaust run (lint-packed vent), not the safety itself. We clear the vent before resetting; a thermostat that re-trips means the airflow path is still blocked, so swapping the part without clearing the duct just burns a second one.
• On the condensation WTG86 (badged 800 Series, WTG86400UC / WTG86402UC) a "won't heat / takes forever / damp finish" complaint that throws E:01 or E:02 is the fluff/lint filter and condenser air path, not the heater. These are owner-clearable maintenance codes — we rinse the manual heat-exchanger and clean the filter-sensor area rather than condemn a board. E:03 on the same platform is the condensate drainage fault (full tank / blocked or kinked drain hose / tired pump 00145623), which stops the cycle and reads as "no heat."
• NTC temperature-sensor drift gives short cycles or no/low heat because the control reads the air temperature wrong and cuts the heat early. On the condensation platform Bosch flags the front sensor as E:05 (NTC out of range — open or shorted). The 10kΩ@25C NTC thermistor is 00613753 — a BSH part shared with Thermador/Gaggenau siblings, so a number confirmed on the broader BSH catalogue cross-references cleanly to the dryer.
• Heat-pump WTW87 (WTW87NH1UC) / WQB245 (WQB245AXUC) no-heat is the specialist case: F:06 (and E09 on some firmware) is a heating-circuit / over-temperature-of-compressor fault in the SEALED system. There is no element — heat comes from the refrigerant loop, so diagnosis means checking compressor function, the evaporator/condenser airflow and refrigerant charge. This is EPA-608 sealed-system work, not a parts swap, and we say so up front rather than chasing a heater that does not exist.
• Don't mis-order the belt as a "heat" fix. When a Bosch dryer tumbles but won't dry, the blower belt 00604866 (turns the BLOWER wheel, not the drum) can be the airflow culprit on the WTG86 platform — a stalled blower kills the recycled-heat loop. It is frequently confused with the drum drive belt, which is a separate number that must be pulled by exact model/serial. We confirm which belt by serial before ordering.
• Reset expectations on heat-pump models before condemning anything: heat-pump drying runs at a lower, gentler temperature by design (cheaper to run), so a "barely warm / takes forever" call on a WTW87/WQB245 is often normal operation plus a lint-loaded filter — not a heating fault at all. We show the owner the maintenance points once and the repeat calls stop.

Bosch not heating in Toronto — the local specifics

• The recurring Toronto pattern on Bosch "not heating" is that the platform decides the repair, and most owners don't know which machine they have. Condo heat-pump and condensation units (WTG86 / WTW87 / WQB245) come in as "no heat" but read out as E:01/E:02 (clogged fluff/condenser path) or E:03 (full condensate tank / blocked drain) — owner-clearable maintenance, not a dead heater. The genuine heater replacements (E06, element 00649017) cluster on the older vented Axxis machines. So a large share of these calls are taught-and-cleared rather than parts jobs, and we set that expectation on the phone.
• We carry to a Bosch not-heating call: the 00613753 NTC thermistor (10kΩ@25C, BSH-shared), the 00422272 manual-reset high-limit thermostat for the vented Axxis units, the 00145623 condensate/drain pump for the ventless platforms, and the 00604866 blower belt. The 00649017 vented heating-element assembly (includes thermistor + thermoregulator) and any heat-pump sealed-system module are confirm-by-serial, plan-ETA orders, not van stock.

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 not heating guide.