Bosch Refrigerator Repair in Toronto — Not cooling

• Evaporator fan failure is the classic 'freezer cold, fridge warm' Bosch not-cooling call on single-evaporator French-door and bottom-mount units, where one evaporator fan circulates cold air to both compartments: spin the blade by hand, then test the windings for continuity. Part 00672636 is the freezer-section evaporator fan motor (fits Bosch/Thermador/Gaggenau); when it stalls, cold air stops moving and the cabinet drifts warm while the sealed system still runs. Note that the 800-series B36CT and B36CL are dual-compressor / dual-evaporator units (each compartment has its own evaporator and fan), so on those a warming fresh-food side points to the fresh-food evaporator circuit specifically rather than one shared fan.
• Iced-over evaporator from a dead defrost circuit is the second pattern: frost packs the coil, blocks airflow and the box slowly loses cooling. The defrost heater is Bosch part 12023292 (Bosch/Thermador/Gaggenau); pair it with a continuity check of the evaporator temperature sensor 11030589, since a sensor that fails to initiate or terminate defrost is what lets the coil ice up in the first place.
• Temperature-sensor (NTC thermistor) faults throw readable E-codes and force the board into the wrong cooling strategy: E01 = fresh-food compartment sensor, E02 = freezer compartment sensor, E03 = the temperature-controlled (VitaFresh) drawer sensor. A defective thermistor reports a false temperature so the compressor under- or over-runs; inspect the harness for corrosion or melted insulation first, then replace the sensor (thermistor family incl. 11030589 / 00612240).
• E10 (main control board module faulty) and E20 (communication failure between the main control board and the display module) point to board-level not-cooling after a power event. The main control board is model-coded, so confirm it against the full model/serial before ordering. Verify the comms fault doesn't clear with a power-cycle reset before condemning the board, since E20 is often a harness or connector issue between the board and display rather than a dead board.
• Inverter compressor that won't start is the true 'nothing is cold' failure on Bosch inverter-compressor platforms: the control board sends line voltage to the inverter board, which drives the variable-speed compressor. When the condenser fan runs but the compressor never spins up, the inverter PCB (compressor electronic box) is the usual culprit. Genuine boards are model-coded: 00647583 fits the B22CS30/50/80 side-by-side line, while 00650968 and 00654622 cover other inverter-equipped Bosch models (e.g. B26FT, B36IT/B36ET, T24/T36). Verify no voltage is reaching the compressor terminals before ordering, and match the board to the full model number.
• Air-damper / air-diffuser stuck closed is a top-cited 'fridge warm but freezer cold' cause that is often mistaken for a sealed-system fault: the damper that meters cold air into the fresh-food compartment jams shut, so the freezer holds temperature but the fridge slowly warms. Check it before quoting compressor or refrigerant work: with the evaporator fan confirmed running, put a hand at the fridge vent; no airflow points to a stuck diffuser/damper assembly rather than a cooling-circuit failure. Also rule out the false alarms here, the 'Alarm' triangle / door-ajar temp alert and condensation along the mullion on heavy French doors read as 'warming' but are alignment/airflow, not refrigerant loss.
• Condenser-side overheating shutdowns: clogged condenser coils plus a failing condenser fan motor (Bosch OEM 00795952 / 00601016) let the compressor overheat and cut out, so the unit cools then quietly stops. On these counter-depth Bosch units the coils need a brush and vacuum every 6-12 months; a seized condenser fan (blade won't spin freely, no winding continuity) is the part-level fix.

Bosch not cooling in Toronto — the local specifics

• The recurring Toronto pattern on Bosch not-cooling is the 'freezer fine, fridge warming' split, an evaporator-fan or stuck-damper airflow fault or an iced coil from a tired defrost circuit, plus a run of board/comms E-codes (E10/E20) that show up after power events. Inverter-compressor no-starts surface most on the inverter-equipped Bosch lines (B22CS side-by-side, B26FT, B36IT/B36ET, T-series) as they go out of warranty; the dual-compressor 800-series B36CT/B36CL instead split into a per-compartment diagnosis.
• We carry the high-turn Bosch cooling parts to these calls: evaporator fan 00672636, condenser fan 00795952/00601016, defrost heater 12023292 and evaporator sensor 11030589, plus harness/connector spares for E20 comms faults. Model-coded inverter and main control boards (00647583 / 00650968 / 00654622) we confirm by full model number and pre-order, so when the part is pre-ordered the second visit typically installs same-week.

For the full Bosch refrigerator module — every fault, part number and code — see Bosch refrigerator repair in Toronto, and for the same fault across all brands the refrigerator not cooling guide.