Abstract: A defrosting unit with a timer, wherein the unit includes a round drum shaped wheel 5 for cooking function, a lobed wheel 6 for defrosting having a peripheral shape so as to produce periodic on/off contacts in cycles with a switch 8, both wheels being mounted on the shaft 2 of the timer 1 and on the shaft 4 of the knob 7, a joint 3 joining the knob shaft with the timer shaft in such a way as to move the shafts in a back and forth movement for a distance (S) of stroke, and the sensitive switch 8 operating on/off in association with the wheels moved with shafts.