bedell wrote:
Check wire connectors. The crimp style can become loose. We had that happen and the repair tech replaced them with wire nuts where possible.
Hope you get it working.
I'm in this camp that something like this is wrong. The OP stated it came on and ran through a full cycle after tapping the ignitor. This would rule out the LP being off, or having air in the lines. Something is not letting it ignite correctly. Fuel supply to the furnace is not the issue. Getting it ignited sounds like the problem. You just have to figure out why.