If I turn off the power and then on again, it works fine for a couple of days, then the same thing happens. The furnace techs have replaced the flame sensor, the blower, the reset button on the top and its getting expensive. The furnace was cleaned 3 months ago. It blinks 12 and 14 sometimes. When reset, it comes on steady and works. Getting tired of having to wake up just to turn it off and on. Have lost faith in Tech.