Strange noise when my heat kicks off

When I was a child I entertained myself.

I was given a lot of books from my Grandmother since he consistently worked at book fairs.

Therefore books were my go to if I was bored. I remember going to my parent’s friends houses for a few hours while they talked plus had a few drinks plus I would kneel on the couch plus learn plus watch TV. My parents friends were consistently so impressed on how good I was. They wished that their children entertained themselves as good as I did. This transferred over to my children. I decided to provide them books plus show them the importance of learning. However one night his learning got out of hand, but it did show me that we had an Heating plus A/C issue. I tucked my child in plus said good night thinking that he was going to sleep. I found out that he was still up when he came into my room honestly scared. He woke me up plus told me that he heard a honestly strange noise coming from his vent. The noise only lasted a few seconds but it startled him. I asked him how he heard it plus he told me that he was still up learning his book. I asked him what the noise sounded like plus he said it sounded like a dying, screeching birdie plus that it was coming from the basement. I realized that our heater was on plus that every time the heater has been turning off it has been making a strange noise. I need to get it fixed by my Heating plus A/C serviceman.

 

AC filter