I own a Goodman Gas pack model GPG1024 that has failed 4 times in the past month. It usually goes out during the night. I find that the blower is running but no ignition is occurring. On the circuit board the LED light is flashing twice signifying the pressure switch is stuck open( I don't really know what that means or where on the unit it is located). It sometimes restarts after a couple of hours. One time I got it to restart by turning off the power at the breaker for a couple minutes and then switching the breaker back on. If anyone can offer some advice in fixing this I would appreciate it.

Bill

You can test or just replace the pressure switch. Look on your wiring diagram on the blower door for a location. You might also rempve the vinyl hose attached to it and blow through it to clear any obstructions that could be causing the problem.

Here is a complete manual for your furnace. It says amana but goodman makes it. Same unit.

https://www.acwholesalers.com/EasyEditor/assets/goodman%20gpg13%20service%20manual.pdf