How Do You Know If Your Central Air Unit Needs Serviced

My Name is Tom Henry with Wilbur Henry Plumbing, Heating and Cooling in York PA. Our website is www.wilburhenry.com/ and our phone number is 717-755-5461.
My son Dave Henry answers the question - "How Do You Know If Your Central Air Unit Needs Serviced?"
Some of the signs would be your air conditioner running longer than it normally does.
Or you look at your thermostat and its set 72 but its 74 in the house.
Signs like that are issues that you may need air conditioning may need a little maintenance or have a dirty filter.