I have a Goodman GMPN080-4 Rev 4 furnace and it will not ignite. I believe the, not sure about the tech term, flat bar that turns red hot like a stove coil has gone bad (it does nothing). I see a red LED light on the computer type panel blink 3 quick, 2 sec pause, 3 quick, 2 sec pause and so on. Any help would be greatly appreciated.

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Have a look whether there a trouble shooter on the back of the bottom panel.

3 flashes says its pressure swith closed with flue venter off. Check your pressure switch. The bottom panel has that info on it.

You may have a stuck pressure switch you can blow and suck lightly on the rubber tubes going to the pressure switch to free it.