Between heating cycles the exaust fan comes on,the pilot glows,there is a little green light that flashes on ,off ,in the following sequences , o__000000__0__000000 , this lasts for about 2 to 3 minutes. Then the exhaust fan and pilot go off. No burner ignition occurs during this. This sometimes occurs 3 t0 4 times between burner cycles.

Which model of keeprite furnace you use now and based on the light flash means something wrong with the flame sensor.