It sounds to me that the house is alive. No that doesn't mean its breathing lol. What I mean is, that a spirit has taken over the entire house, "possessed" it. Spirits can enter into any vessel, gemstones, books, furiture and even an entire house. When it does this, it can control the house, and you have yourself a full scale haunting. Those can become dangerous because entering it is like entering their own realm. The energy is thick, the temperatures are odd, and overall any manifestations or paranormal activity is heightened tremendously. Instead of activity only surrounding the spirit itself, it can occur throughout the entire house simultaneously yet still be controlled by one single soul. This takes a long time to accomplish but if the spirit was a past resident, it would already "belong" to them, which would make it a lot easier.
It wants to be left alone. Until someone who understands such things moves in, it won't be resolved. And since you can't get inside to resolve it, talking to him/her may only cause more problems for you.