Bosch Refrigerator Repair in Toronto — Freezer cold but fridge warm

• A stalled evaporator fan is the number-one 'freezer cold, fridge warm' cause on Bosch single-evaporator French-door and bottom-mount cabinets, because one evaporator in the freezer section feeds cold air to BOTH compartments. When that fan quits, the freezer holds on its own coil while the fresh-food side never receives circulated air and drifts warm with the sealed system still running. The OEM freezer/evaporator fan motor is Bosch 00672636 (fits Bosch/Thermador/Gaggenau). We spin the blade by hand first — it must turn freely — then meter the windings for continuity; a seized bearing or open winding condemns it. Parts distributors document 00672636 as the exact part for a Bosch box whose freezer is cold but refrigerator is warm.
• A stuck-closed air damper is the textbook 'fridge warm, freezer fine' Bosch fault that is constantly mis-sold as a sealed-system or compressor job. The damper meters cold air from the freezer evaporator into the fresh-food compartment; when it jams shut, the freezer keeps temperature but the fridge slowly warms. The OEM Bosch air-damper control assembly is 00798467, listed by distributors as controlling cold airflow from the freezer compartment into the refrigerator compartment. We confirm the evaporator fan is actually running, then hold a hand at the fresh-food vent at the top rear wall — no airflow with a cold freezer points at the diffuser/damper, not refrigerant loss — before quoting any cooling-circuit part.
• An iced-over evaporator from a dead defrost circuit chokes airflow to the fresh-food side while the freezer's own mass stays cold for a while, so it reads as 'freezer works, fridge warm' early on. Frost packs the single coil and the fan can't push air through it. The OEM defrost heater is Bosch 12023292 (Bosch/Thermador/Gaggenau); we 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 over in the first place. We pull the freezer evaporator cover, confirm a frost-packed coil, and meter the heater element in service mode — an open heater passes no current — rather than blind-swapping; on a frosted coil, treating the fan alone re-ices within days.
• A defective NTC thermistor reports a false temperature and forces the board into the wrong cooling strategy for the warm side specifically. Bosch ties the fault to a readable display code: E01 = fresh-food compartment sensor, E02 = freezer compartment sensor (E03 = the temperature-controlled VitaFresh drawer sensor). An E01 with a warm fridge and a cold freezer is a fresh-food-sensor-and-defrost fix, not a refrigerant job — the board misreads fridge temperature, under-runs cooling or mistimes defrost on that zone, and the compartment drifts. We read the code with the door-combo service mode, inspect the harness for corrosion or melted insulation, then ohm the matching thermistor across a temperature swing (family incl. 11030589 / 00612240) before condemning a board.
• On the 800-series B36CT and B36CL French doors the 'freezer-works-fridge-warm' diagnosis flips: these are dual-compressor / dual-evaporator machines — each compartment has its own independent cooling system, confirmed in Bosch's own product literature. So a warming fresh-food side with a cold freezer is NOT a shared-fan or shared-damper fault; it points squarely at the fresh-food evaporator's own circuit (its dedicated evaporator fan, thermistor, or that side's sealed system) while the freezer system stays normal. We model/serial-verify the platform before quoting, because diagnosing one of these like a single-evaporator box — chasing the shared 00672636 fan or 00798467 damper — wastes the call.
• An over-temperature shutdown from the condenser side reads as a fridge that cools then quietly warms while the freezer mass lags behind: clogged condenser coils plus a weak or seized condenser fan let the compressor overheat and cut out. Distributor repair guidance confirms that a clogged condenser or a non-spinning condenser fan makes a Bosch refrigerator struggle to hold cold. On these counter-depth Bosch units the coils need a brush-and-vacuum every 6–12 months; we confirm the condenser fan spins freely and tests continuous before any sealed-system talk — a dust-blanketed coil is the cheapest real fix here and the one most often skipped.
• A 'warm fridge' that is really condensation or a door-seal leak is the signature Bosch French-door trap, and the module's own quirk note flags it: on heavy 800-series doors a torn or compression-set fresh-food gasket (OEM 11030520, Bosch/Thermador) lets humid Toronto kitchen air in, so the fresh-food side fights to hold temperature and sweats at the mullion. The freezer, sealed and colder, looks fine by comparison. We dollar-bill-test the full perimeter and check door/hinge alignment before touching any cooling part — many of these resolve at a gasket or alignment adjustment, and Bosch seals are model-coded across the B36 line, so we confirm the exact gasket by full model/serial before ordering.

Bosch freezer cold but fridge warm in Toronto — the local specifics

• The recurring Bosch-in-Toronto pattern on this fault is single-evaporator French-door and bottom-mount cabinets where the freezer holds fine but the fresh-food side warms — and it splits cleanly into a stalled evaporator fan (00672636) or a stuck-closed air damper (00798467), with a frosted-coil defrost-circuit fault behind a smaller share. The mis-call we correct most often is an owner or prior tech reaching for 'compressor' or 'refrigerant' when no air is reaching the fridge vent because the fan stalled or the damper jammed. On 800-series B36CT/B36CL dual-evaporator units the same symptom means the opposite — the fresh-food side's own circuit — so we model-verify before quoting.
• We bring the 00672636 evaporator fan motor and the 00798467 air-damper control assembly to these Toronto calls (the two most common fixes), plus the 12023292 defrost heater / 11030589 evaporator sensor pair for the frosted-coil cases, and we service-mode the display first to read any E01/E02 thermistor code so we don't swap a fan when the board is misreading temperature. Model-coded parts for dual-evaporator 800-series units and the 11030520 French-door gasket are confirmed against model/serial and pre-ordered.

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 freezer cold but fridge warm guide.