Hello,
I have a goodman furnace and it is not firing when I turn it on to heat. The gas is on but the unit never comes on once I turn the thermostat to heating and adjust the temp on the thermostat. What do I need to do to fix this?

How old is your furnace, does it have a standing pilot or a hot surface ignitor? Do you have a small fan that you can see with the top door off the furnace?

Answer these questions and maybe we can help.

Yes, please answer letmetellu's questions, and we will do our best to help. IF you could just post a couple of pictures,, one of the furnace with covers on, and one of the furnace with covers off, we should be able to get a better idea of what we are dealing with. If it's a newer Goodman, trouble shooting is fairly simple, but may require certain tools(multi meter being one of them). Also, correct model number will help immensly. IF you can't send pictures, just describe how the covers come off, and what the vent looks like. Lee.