What do you call a man who knows well how to fix his household appliances?
Some men are really good at fixing things, especially the household appliances while they're not specialists or technician. Is there any words to explain these people?
Handy, which is something I'm not. (Just ask my wife...) MW says:
clever in using the hands especially in a variety of convenient ways [a man who is handy around the house]
The person is called a "handyman".
A handyman is a person skilled at a wide range of repairs, typically around the home.
From Wikipedia
Jack of all trades, odd-job man might be synonyms of handyman.