Hello, thank you for your suggestion, on the basis of which the supplier contacted us and would like to respond below.
"Hello, if the vacuum cleaner is losing suction power, it is necessary to check whether the tube connecting the nozzle to the waste container is blocked. If, for example, pine needles or a toothpick get into the hose, dust will build up on the hose and then clog the air passage so much that the engine performance is reduced, the engine overheats and can be damaged. If you would like us to investigate your case, please send us a scan of the repair slip with which the appliance was returned to you to
[email protected]. Regards Team Sencor"
Please do not hesitate to contact us in case of need. Thank you and have a nice day, Ondřej - Alza expert