What T3 Means
WHICH MACHINES THIS APPLIES TO: this code belongs to the Asko wine climate cabinet WCN311942G and it comes from that cabinet's own instruction book. The WCN311942G is a three-zone cabinet with a touch display, and the code alphabet it uses - E, F, H, P, T and U letters sorted by the part that reported the problem - belongs to this cabinet and to nothing else in the Asko range. That matters more here than almost anywhere else on this site: the same short strings appear on Asko washers, dryers and drying cabinets with entirely different meanings, so a wine-cabinet F2 has nothing whatever to do with a washer F2 or a drying-cabinet F2.
HOW THE CABINET TELLS YOU: the code arrives as a pop-up notification on the touch display. It stays on the screen until it is dismissed with X or Confirm, and if the condition behind it has not been dealt with, the notification comes back three hours later. That timer catches people out. The message goes away when it is tapped, the cabinet seems fine all evening, and the same code is on the screen again in the morning. Nothing has gone wrong twice - the cabinet has simply looked again.
WHAT T3 MEANS: the part table in the instruction book reads "Temperature sensor error for zone A evaporator." An evaporator is the cold surface where the refrigerant takes heat out of the air, and this sensor reads that surface rather than the air the bottles are in.
WHY A SEPARATE SENSOR FOR THE COLD SURFACE: because the air temperature and the surface temperature tell you different things. The air tells the cabinet how the wine is doing; the surface tells it how the refrigeration is doing - whether the coil is pulling down as it should and whether it is frosting. Asko does not publish how this cabinet uses the reading or what it does without it, so this page names the part and the zone and leaves the rest alone.
WHAT YOU MIGHT SEE: frost or ice building up in one zone, or a zone that cools in a way that has become uneven or erratic. Those are consistent with a cabinet that has lost sight of its own coil, and they are worth reporting; they are not proof of it.
THE COMPARTMENT SENSOR IS A DIFFERENT CODE: T2 reads the air in zone A. If the display figure for the zone looks wrong, that is the entry to read. T3 is the coil.
WHAT ASKO PUBLISHES BESIDE IT: the meaning only. There is no action column in the part table, so no consequence is claimed here.
Common Causes of T3
- Zone A evaporator sensor failed or out of range
- Wiring or connector to that sensor disturbed
- Sensor displaced from its contact with the evaporator
- Frost or ice build-up around the sensor position
- Power board not reading the sensor
🔧 One Safe Check You Can Try
Look, record and leave alone. Note the setting and the reading for each zone with the time, then look into zone A for frost or ice on the interior surfaces and for water standing anywhere it should not. Photograph anything you find, because it will be gone by the time a technician arrives if the cabinet has cycled since. Put an independent thermometer on a shelf in that zone, shut the door for several hours, and compare its reading with the display. Keep the door closed otherwise - warm room air is what puts moisture into a cabinet and turns a coil problem into a visible one. Do not defrost anything with heat, a tool or a hairdryer: a coil is thin-walled and part of a sealed refrigerant circuit, and a puncture turns a sensor repair into a scrapped cabinet. Do not remove interior panels to find the sensor, since that circuit and the interior wiring are both behind them, and the wiring is live whenever the cabinet is connected to power.
⚠ Why You Shouldn't Go Further Than That
- Asko prints the meaning of this code with no action beside it, so there is no manufacturer procedure for an owner to work through.
- The evaporator sensor sits against the sealed refrigerant circuit, which is thin-walled and is never prised at, scraped or warmed with a tool.
- The sensor and its wiring sit inside the cabinet at mains voltage whenever it is connected to power.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.