Codes that shift with the board
Asko’s TD70 dryer platform has been revised several times, and each revision changed the shape of its codes, so the very same fault can read quite differently between two dryers that look identical. One revision uses L2 to L4, another moves to F10, F29, and F30, a later one adopts S1 through S9, and the newest prints J1 or an LCD1-to-LCD3 message.
The steam and analog exceptions
The T411VD steam and heat-pump platform reports its own ERROR_0 through ERROR_5 range instead. At the other extreme, the simple analog T208V condenser dryer publishes no codes whatsoever — a verified absence rather than an oversight — so it is worked out purely from symptoms.
Symptom-led checks
Damp loads and long cycles most often trace to a clogged condenser, a lint-choked airway, or a full water reservoir that has failed to drain. A drum that refuses to turn instead points at the belt or the motor.
When to call
Because the meaning hangs on the revision, matching your reading to the exact board is essential before any part goes in, and that is a job for an experienced technician with the right genuine OEM or trusted-supplier part. Check the dryer error codes page or the error-codes library, then arrange dryer repair.