My Whirlpool dryer still works fine. But, it began sometimes squealing while it ran. I could open & close the door & it would stop. But, as I have done a few more loads it has gotten worse & now does it constantly. Everything still seems to be working just fine. Any ideas? Or, is it time to call the repair person? Help!

My Whirlpool dryer still works fine. But, it began sometimes squealing while it ran. I could open & close the door & it would stop. But, as I have done a few more loads it has gotten worse & now does it constantly. Everything still seems to be working just fine. Any ideas? Or, is it time to call the repair person? Help!
It's time to call the repair person! Actually, it's been time! Anytime something out of the ordinary begins to occur with you home appliances rather minor or major, you don't just ignore the problem, you hurry and solve it before it's too late. My advice, call the repair person NOW!