Miele Refrigerator Repair in Toronto — Not cooling

• NTC evaporator/fridge temperature sensor failure is the most common not-cooling fault we confirm on KFN bottom-mounts and KF/K MasterCool columns. The genuine sensor (7323301, with the freezer/fridge kit 7323302; cross-refs 959020600 / H272037 — note this number is shared with Liebherr, which supplied Miele cooling components) reads roughly 4.7-5.3 kOhm at room temperature and tells the PCB when to start and stop the compressor. When it drifts open or out-of-range the board mistimes cooling and the box runs warm. We meter the sensor against that resistance window before condemning anything electronic, and on units of that vintage fit Miele's supersession repair kit 10321751 (replaces 10321750) rather than a loose part.
• An F1 or F2 on the display is a refrigerator-compartment NTC temperature-sensor circuit fault, not a compressor code. Published Miele literature splits across service generations on exactly which probe each number names — some charts read F1 as the evaporator sensor and F2 as the condenser sensor, others read F1 as the fresh-food-cabinet sensor and F2 as the evaporator sensor — so we map the code to the unit's own service generation first, then ohm the matching sensor (7323301/7323302) at the plug. The distinct ambient/condenser-area sensor surfaces under its own code (F122, the kick-plate sensor) and is a separate part. An F1/F2 with a warm fresh-food section almost always resolves at the sensor, so we rule that out before any board or sealed-system conversation begins.
• Fridge-warm-while-freezer-stays-cold is the classic KFN airflow split: the evaporator ices over and jams the circulation fan, so cold air never reaches the fresh-food compartment even though the compressor and freezer are fine. This is a defrost/airflow call, not a sensor swap. We pull the rear freezer panel, clear the ice slab off the evaporator and fan, and verify the defrost circuit and the sensor that governs it before reassembly, so the box doesn't re-ice within weeks.
• Defrost-drain icing is the not-cooling cause that hides as a leak. On KFN units the drain at the back of the freezer floor plugs with debris or ice, defrost melt has nowhere to go, it refreezes into a slab over the evaporator, chokes airflow and the fridge slowly warms, ending as water tracking down the rear wall to under the crisper drawers. We clear the drain channel and confirm flow rather than just chipping the visible ice, since a blocked drain re-ices and the warm-box complaint returns.
• Magnetic door-seal and hinge wear lets warm room air in, frosts the box and makes the unit run long without holding temperature. The seal halves are model-coded (e.g. 5411711) and need Miele's fitting kit 7625460 plus the correct glue, so we confirm the exact seal by serial before ordering. We reseat or replace the magnetic seal and check hinge sag before condemning any electronics, because a perimeter-sweating door reads as not-cooling but is purely mechanical.
• On MasterCool ice-and-water models a partial not-cooling complaint sometimes traces to filter-starved airflow/icing rather than the cooling system itself; we verify the IntensiveClear KWF 1000 filter (11513640) is current and seated, then confirm the fault is genuinely cooling before quoting sealed-system work. Coded electronic-board and sealed-system faults remain Miele Canada's call and route factory-direct; the sensor, fan, drain and seal faults above are the everyday not-cooling fixes an out-of-warranty independent actually closes.

Miele not cooling in Toronto — the local specifics

• The recurring Toronto pattern on Miele not-cooling calls is the warm fresh-food box that the freezer is still holding cold: it splits between an out-of-range NTC refrigerator-compartment sensor throwing F1/F2 and an iced evaporator/jammed circulation fan from a plugged defrost drain. Built-in MasterCool columns in custom cabinetry tend to surface the drain-icing and door-seal version because they run cabinet-tight and warm; KFN freestanding units skew to the sensor and fan version. We diagnose which split it is on-site before ordering, since the sensor path is open-channel and quick while a board path is factory-direct.
• We carry the genuine NTC sensor kits (7323301 / 7323302, cross-refs 959020600 / H272037) and the 10321751 repair kit, a meter to confirm the 4.7-5.3 kOhm window, drain-clearing tools and a fresh KWF 1000 (11513640) to these calls. Model-coded door seals (e.g. 5411711) and the 7625460 fitting kit we order by serial first; coded boards and sealed-system parts route factory-direct via Miele Canada.

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