I have a Goodman GMP 050-3 gas furnace which worked fine last winter/spring. Nothing has changed and now the furnace fails to ignite. When I set the thermostat for heat, the blower motor immediately starts while the draft fan motor doesn't and of course the furnace doesn't ignite either. Blower will run for a minute or so and then turn off. Status LED is not blinking or flashing. One odd thing that was happenind this summer while the A/C was running... I could hear the draft fan intermittantly turn on and off randomly.

Any tips on what I can check out?