Method for detecting an at least partial blockage of a process air channel in a tumble dryer and for performing such a method

The invention relates to a method for detecting an at least partial blockage of a process air channel (4) in a dryer (1) in which a drying chamber (2) heated process air is fed, the dryer (1) with a heat pump device (6) is equipped, circulated in the refrigerant circulating through an evaporator (8), a compressor (9), a condenser (10) and a throttle device (11), wherein the process air to heat via the condenser (10) is guided. In order to detect an at least partial blockage of the process air passage in a simple and efficient manner, it is proposed that at least one first temperature value (T Alternatively, a second temperature value can be measured (T