Hello-I guess I'm another in a growing line of folks who are finding out on a chilly day their furnace is bum.

I have a York Affinity 9T gas furnace and it worked a couple of weeks ago but today it isn't turning on. It is making a very low buzzing noise as though it wants to work but isn't quite there. I searched the Internet but there doesn't seem to be any DIY-info for this model and York, of course, doesn't have any user guide on it's website. And our owner's manual is nowhere to be found.....

Does anyone have this or a similar model and can you tell me what 3 flashes of red might mean?