A laundry washing machine (1) includes a washing tub (3) external to a rotatable washing drum (4) adapted to receive laundry. The machine further includes a water supply circuit (5) to supply water into the washing tub (3), a washing/rinsing products supplier (6) to supply washing/rinsing products into the washing tub (3), a heater device (10) placed at the bottom (3a) of the washing tub (3) for heating a liquid coming into contact with it and a liquid output (37) placed at the bottom (3a) of the washing tub (3) for introducing liquid into the washing tub (3). The liquid output (37) is arranged in such a way to emit a jet of said liquid below the heater device (10), the jet having a main flowing direction (L) substantially parallel or pointed to the bottom (3a) of the washing tub (3), so as to remove washing/rinsing products collected therein.