Goodman Heater Without a pilot light how do I get heater to heat? there is no pilit light, don't understand.

This furnace has a diagnostic light on the control board found in the lower section of the furnace. Pilots are a thing of the past and your system has a glow ignitor. Look thru a small viewing port to see how many blinks are being displayed. Then remove the access panel and on the reverse side of it is a diagnostic chart that will tell you where to start looking. I would suggest you make sure the air filter is clean and that the condensation is being removed. Recycle the furnace with either the breaker or emergency switch. You can cycle the furnace with the front cover off if you tape the door switch closed. It may be easier to view the sequence of operation to pick up on where the fault is occuring.