The proposal of the diagnostics methodology for the passenger lift winch is presented in this article. The selected device is tested against the emitted volume of sound and vibrations observed in the regular operation (driving operation as per agreed testing sequence). Thermal images are prepared to catch incorrect operation of the winch mechanisms. On the basis of received measurements for the sound volume, accelerations (vibrations), the analysis of vibrations frequency and thermal images, the attempt is made to diagnose the winch condition and to indicate possible reasons of the malfunctions condition.