Samsung Refrigerator Repair in Toronto — Not cooling

• The most common 'not cooling' fault on Samsung French-door (RF26/RF28) and side-by-side (RS25/RS27) units that isn't the compressor is a frosted-over evaporator coil throwing a defrost code: a 5E / 5C defrost-sensor fault from the DA32-00006W defrost/temperature sensor (cross-references DA32-00006S) lets the board mistime or skip the defrost cycle, frost packs the fins edge-to-edge, airflow chokes, and the fresh-food side drifts warm while the freezer hangs on. We meter the sensor against its temperature curve and run forced defrost (Fd) to clear the coil before condemning anything in the sealed system, because a hairdryer thaw alone just re-ices in a day.
• When the coil ices solid but the defrost sensor reads in spec, the defrost heater itself has gone open: the DA47-00244U metal-sheath defrost-heater assembly (RF23/RF26/RF28 platform) carries an inline thermal cutoff, and once that cutoff or the element opens the heater never fires, so frost rebuilds on the evaporator every cycle and cooling fades within a day or two. We ohm the heater for continuity (an open reading, often with a discolored sheath, is the tell) and replace the assembly rather than chasing the sensor, because replacing the wrong leg of the defrost circuit is a guaranteed repeat call.
• A 22E / 22C code is a fridge-evaporator-fan fault — the board getting no RPM feedback from the fresh-food evaporator fan motor. When that fan stalls on ice or the motor opens, cold air stops circulating into the fresh-food compartment and it warms even though the compressor and freezer are fine. The 146-series Samsung evaporator-fan motors are not interchangeable (Samsung runs both ~2520-RPM AC and ~1920-RPM BLDC variants, and many Twin-Cooling models use a separate motor for each compartment), so we match the exact fan motor to the unit's model/serial rather than slapping in a generic. We thaw and clear the iced blade first, then replace the model-correct motor if it's dead; the fan noise that stops when you open the door is the classic tell.
• A 21E / 21C code is the freezer-evaporator fan (no rotational feedback to the PCB): the freezer-side evaporator fan has stalled or opened, so sub-freezing airflow collapses and the whole cabinet loses cold. It presents as 'not cooling' the same as 22E but lives behind a different panel and uses a different motor — we confirm by listening for a fan that doesn't spin (or one that's grinding on frost) and run forced defrost to rule out a simply iced-over blade before replacing the motor.
• A box that clicks repeatedly but won't cool — freezer and fridge both warming — points at the compressor start circuit, not airflow: the DA35-00099G PTC start relay clamps onto the compressor and delivers the start-current surge, and when it fails the compressor tries, trips its overload, and clicks every few minutes. We do the classic shake test (a rattle means the relay is shot), verify voltage to the overload, and replace the inexpensive DA35-00099G before ever quoting a compressor, since a dead relay mimics a dead compressor.
• 'OF OF' (Cooling Off / Demo mode) on the display is not a failure and is a frequent false 'fridge stopped cooling' call: in demo mode Samsung disables the compressor and fans so the unit runs lights and display but never cools. A key-combo (hold Energy Saver + Freezer / Power Freeze for a few seconds) clears it. We always check for OF OF first on a no-cool call before opening any panel, because it's a no-part, no-charge fix.
• On Twin-Cooling models the fresh-food and freezer evaporators are separate, so a not-cooling complaint on one side with the other side fine is diagnostic: a 22E (fresh-food evaporator fan) or a 5E defrost fault (DA32-00006W) explains a warm fridge with a cold freezer, while a 21E points to the freezer-side evaporator fan. Because each compartment runs its own fan motor on these models, we identify the exact 146-series motor by model number, and we use forced defrost (Fd) and the self-diagnostic readout to separate an airflow/defrost fault from a true sealed-system loss before quoting refrigerant or a compressor.

Samsung not cooling in Toronto — the local specifics

• The recurring Samsung not-cooling pattern we see across Toronto French-door and side-by-side units is the warm-fridge / cold-freezer split that traces to the defrost circuit or the fresh-food evaporator fan rather than the compressor — a 5E defrost-sensor or 22E fan code with a frosted coil, where forced defrost (Fd) plus the right DA32-00006W / DA47-00244U / model-matched evaporator-fan part restores cooling without touching refrigerant. We also catch a steady share of 'OF OF' demo-mode false alarms and clicking-compressor calls that turn out to be the DA35-00099G start relay, not a dead compressor.
• We carry the Samsung not-cooling kit to these Toronto calls: DA32-00006W defrost sensor, DA47-00244U defrost-heater assembly, the model-matched 146-series evaporator fan motor (verified by model/serial — fresh-food vs freezer, AC vs BLDC — since these aren't interchangeable), and a DA35-00099G PTC start relay, plus gasket and door-alignment supplies so the airflow fix holds. Compressor and main-board jobs are confirmed by serial/warranty entitlement and ordered Samsung-OEM rather than carried.

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