Fans don't run

I have not seen the radiator fans move in my 1991 Honda in more than four years.The car doesn’t overheat,but should I worry about this?

I can run the car all day long,they NEVER turn. A couple of years ago,I had a hose leaking which caused the radiator to overheat severely, and even then the fans never budged an inch.

I’ll give it a try.Thanks!