I have a Goodman GMP100-4 Heater. It was working fine and now it will not ignite. When I move the thermostat to a higher temperature I can hear the exhaust come on but that is it. I was told that possibly the ignitor went out.

Can anyone help?

Thanks

Could be the ignitor
Could be the flame sensor if so equipped
Could be the vac/pressure switch
Could be the vent motor end switch if so equipped.
There are other possibilitys

Check and see if it has any codes from the LED Lights located on the circuit board. Their should be a code list showing the meaning of the blinking lights. Let us know what it says and maybe we can help you or tell you you if you need an expert