$20 says its the ground. If the ground is flaky, the unit will ground through your door triggers, or wherever it can, make poltergeist.

We had a Jaguar come in and say she was driving down the road at night, and the dome light started blinking and doors were locking/unlocking, wipers going. She was freaked out. -Bad ground. She said if we couldnt fix it, she was going to take it to the church to have an exorcist done LOL

-Spy