Like the title says, how accurate is yours? Mine seems to be way off, I set it to 70 and while it is 74 in the house and it fires the stove up... brings the house up to 75-76. So I put it down to 65 or so and now its out and not calling for heat. I've tried 68ish and it still fires up. The house is currently 75 and I know if I put the dial at 68-70, it will fire up again. Seems to be over 5 degrees wrong. Is their some calibration procedure?