Grandfather's Ghost

3 years ago, I was in school at our annual school picnic and my grandpa had been sick with cancer for about 2 years. He's been in 4 different hospitals and wasn't getting any better. The doctors finally told him that they couldn't do anything, so they just sent him home. He lived in my aunt's house for about a month before my dad came and got me and my sister at the picnic, and told me that my grandpa just died. A year later, my dad bought the house from my aunt because she kept hearing noises coming from the room my grandpa died in. Soon after my dad bought it, the noises didn't just come from the room, it started coming from the basement. We started hearing wheezing noises, banging and clanging like someone was looking for something. We moved away now and we never found out what made the noise.