The present invention relates to a laundry washing and drying machine (1) comprising a drum (2) wherein the laundry is placed, a tub (3) wherein the drum (2) moves, a detergent dispenser (4) wherein the chemical cleaning agents to be used in the laundry washing process are placed, an air ventilation duct (5) wherein the processing air circulation providing the laundry to be dried at the drying process after the washing process is realized, an air-cooled condenser (7) condensing the processing air, a control unit (10) controlling the washing-drying programs, a first valve (11) providing water to be taken from the water supply (S) at the beginning of the laundry washing program and to be sent to the tub (3) through the detergent dispenser (4) and a second valve (12) providing water to be taken from the water supply (S) to be sent to the air ventilation duct (5) and the condenser (7) in order that laundry fibers and lint that are carried with the processing air and that adhere to the air ventilation duct (5) and
