Thermador Refrigerator Repair in Toronto — Running constantly / never shuts off

• The single most common running-constantly cause on a Thermador Freedom column or T36-class built-in is a dirty top-grille condenser coil, NOT a sealed-system fault. Unlike a freestanding fridge, these BSH built-ins hide the condenser behind a flip-up grille above the doors, so it is almost never cleaned and packs solid with dust and pet hair. A clogged coil can't reject heat, the compressor never satisfies and runs near-continuously, and the unit runs hot and loud at the upper grille. We pull the top grille, vacuum-brush-vacuum the coil, and confirm the compressor begins cycling off again BEFORE anyone touches refrigerant - on this platform a dirty coil is far more often the 'always-running' cause than a low charge.
• A failed condenser fan motor is the partner fault to a dirty coil: even a clean coil can't shed heat if no air moves across it, so the compressor overheats and runs constantly to try to hold temperature. The genuine Bosch/Thermador/Gaggenau condenser fan is 00795952 (confirm role by full model/serial, since on some BSH builds 00795952 is cross-listed as an evaporator fan). We listen at the lower/rear machine compartment and spin the fan blade by hand; if it won't turn freely, only hums, or its bearing drags, we replace the motor and re-verify the compressor cycles off, because a stalled condenser fan reads exactly like a low charge from the front of the cabinet.
• A worn, torn, or magnetically tired door gasket makes the compressor run constantly by a completely different route - air infiltration, not a cooling-component failure. Warm humid Toronto room air bleeds past a set or gapped seal, the cabinet can never satisfy its setpoint, and the unit cycles on far too often (the gasket-fit literature explicitly notes a poor seal makes the unit 'cycle on too often'). The genuine Bosch/Thermador/Gaggenau door seal 00716383 (for the 18-inch Freedom format; size-coded to the cabinet) is the part. We check the gasket for set, gaps and a clean magnetic pull, warm and reseat any folds, and confirm the door closes square on its hinges before condemning any electronics - a ~$100 seal is routinely mistaken for a sealed-system job on an $8k-plus integrated unit.
• A drifted or shorted evaporator/freezer NTC makes the main board mis-read compartment temperature and call for cooling endlessly, so the compressor runs constantly even though the box is actually cold. On this BSH platform the freezer-section sensor fault is E02 and the fresh-food sensor fault is E01 (sensor fault/short or loss of communication with the control). We meter the evaporator/freezer NTC (genuine Bosch/Thermador/Gaggenau part 11030589) against its model spec AND reseat the upper-compartment harness connector, because corrosion, moisture in the plug, or a backed-out pin throws the same code and a continuous-run pattern, and is the cheaper find before condemning a good sensor.
• An air damper control assembly stuck in the OPEN position over-cools the fresh-food cabinet and keeps the compressor running well past setpoint: the motorized flap that meters freezer air into the fridge won't close, so cold floods the fresh-food side, frost forms on the back wall, and the unit runs near-constantly to feed the over-open duct. The genuine Bosch/Thermador/Gaggenau part is air damper control assembly 00798467 (replaces AP5806530). We command the damper closed in diagnostics and watch it cycle before condemning it, since a backed-out harness pin can hold it open and is the cheaper find than the assembly.
• A creeping defrost-circuit failure forces the compressor to run constantly: when the defrost heater (genuine Bosch/Thermador/Gaggenau 12023292) opens or the evaporator NTC (11030589) drifts, frost slowly packs the evaporator coil and chokes airflow, so the cabinet can never reach setpoint and the compressor never cycles off. We pull the rear freezer panel - a coil sheathed in white frost confirms it - then meter the heater for continuity (an open heater passes no current) before condemning it. We test the heater and the evaporator thermistor together, since either one breaks the same thaw-the-coil circuit and produces the same always-running symptom.
• A stalled evaporator fan (genuine Bosch/Thermador/Gaggenau 00672636) makes the compressor run constantly while the fresh-food side stays warm: with no air moving over the single evaporator, cold pools at the coil and never reaches the cabinet, so the box never satisfies and the compressor keeps running. We spin the blade by hand behind the rear freezer panel; if it won't turn freely or only hums, we replace the motor and re-verify the cabinet pulls down and the compressor cycles off, because a seized evaporator fan mimics both a stuck damper and a sealed-system fault from the front of the unit. If E10 (main control board) is also present, the board itself can hold the compressor relay closed - we power down 3-5 min to reset and rule out the cheaper air-path and sensor causes before quoting a model-coded board.

Thermador running constantly / never shuts off in Toronto — the local specifics

• The recurring Toronto pattern on a Thermador-running-constantly call is the never-cleaned top-grille condenser coil: because the coil is hidden behind a flush grille above the doors on these integrated built-ins, owners don't know it exists, it packs solid in a warm GTA kitchen, and the compressor runs near-continuously until it's cleaned - we routinely find the coil is the whole fix before any part is needed. The second recurring pattern is a tired door gasket on the 18-inch Freedom columns letting warm room air in so the unit cycles on far too often, and a third is a drifted evaporator NTC (E02) telling the board to call for cooling endlessly.
• We carry to these calls the condenser-coil cleaning kit (the no-part fix that resolves most of them), the door seal 00716383, and the evaporator/freezer NTC 11030589 - the open-stock, cross-listed Bosch/Thermador/Gaggenau items that solve the bulk of always-running cases on first visit. Condenser fan 00795952, evaporator fan 00672636, defrost heater 12023292 and the air damper 00798467 we confirm by full model/serial and bring next-day if the coil, seal and sensor all check out.

For the full Thermador refrigerator module — every fault, part number and code — see Thermador refrigerator repair in Toronto, and for the same fault across all brands the refrigerator running constantly / never shuts off guide.