My electronic ignitor stays on all the time on my Goodman GMP075-4. Even when the a/c is running the ignitor glows hot. As long as there is power to the unit it stays on. Before I change the circuit board could it be anything else?

Sounds like the board is bad. Does it go off when there is flames?

It won't even fire up. The a/c works fine. But nothing happens when the thermostat calls for heat. Except the electronic ignitor glowing all the time.

If the combustion blower and the furnace blower are not running, then the hot surface ignitor relay is stuck. Tap the relays on the board and see what happens.