The timer of my refrigerator I have noticed that it works for a while, it goes into defrosting period and then it does not start, I turn it with a screwdriver and when it turns it works and so it works for a while it goes in and out normal, I have noticed that this does Every 2 or 3 months, will I have to change the timer or what can I do?

the timer can be maintained, uncovering and cleaning the internal plates with an sandpaper, greetings