What T4 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 T4 MEANS: the part table in the instruction book reads "Temperature sensor error for zone B." This is the compartment sensor for the second zone - the instrument that measures the air around those bottles and produces the figure the display shows for that zone.
WHAT IT COSTS YOU WHILE IT IS UNREPAIRED: the reliability of one number. A zone is regulated by comparing its measured temperature with its setting, so a sensor that has failed or drifted leaves the control working from something that is not true. Asko does not publish what the cabinet does in that situation, and because the possibilities point in opposite directions - too much cooling, too little, or none for that zone - no behavior is asserted on this page.
HOW THE ZONE NUMBERING WORKS: T2 is zone A, T4 is zone B and T8 is zone C, with the evaporator sensors at T3, T6 and T9. Read the zone letters on your own display rather than assuming top to bottom, because the codes follow the labels Asko uses and not the physical order of the shelves.
WHAT ASKO PUBLISHES BESIDE IT: the meaning and nothing more. The part table has no action column.
Common Causes of T4
- Zone B compartment temperature sensor failed or out of range
- Connector or wiring to that sensor disturbed
- Sensor displaced so that it reads a surface or a bottle instead of the air
- Power board not reading the sensor
- Room conditions around a built-in cabinet: a blocked plinth grille or a closed-in aperture changes what every sensor in the cabinet is working against
🔧 One Safe Check You Can Try
Measure the zone independently and do not argue with the display. Put a small thermometer on a shelf in zone B, away from the rear wall, close the door and leave it several hours before reading it, then note that figure beside the one the display gives and the time you took both. That comparison is the whole of what an owner can usefully establish, and it is exactly what a technician wants to be told. If the real temperature in that zone is wrong for the wine in it, move the bottles into a zone that is holding its setting and keep the door open as briefly as you can. Resist adjusting the setting for the affected zone: with the measurement unreliable, a change can take the zone much further than intended and the display will not show it. Keep the record going until the visit. Do not open the cabinet up looking for the sensor - the interior wiring is live whenever the cabinet is connected, and the sealed refrigerant circuit is behind the same surfaces.
⚠ 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 sensor and its wiring sit inside the cabinet at mains voltage whenever it is connected to power.
- The sealed refrigerant circuit runs behind the same panels that would have to come off, and that circuit is not opened outside a workshop.
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.