I am glad you called Brower. It is obvious to me that there is a malfunction as you mentioned it does not take more that 2 hours to get an incubators up and running. I understand your time frame but the rule of thumb is to get the incubator stable at least for 24 hours before putting the eggs...
Kiaya, The top hatch operates on the principal of a fluctuating light. It should heat in 1-2 hours and the light will stay on constantly until the temperature reaches the point it is set for. Once the temp has been reached, the light will go on and off continually. Are you sure you have it...