I had a problem 2 months ago. No heat. Circuit board light worked. Fiddled with the board and furnace came back on. This morning, no light and the 5 amp fuse blown. Put in new fuse and it blew also. Do I need a new board?

I'd pay a HVAC tech to look at this. You could spend more money throwing parts at this randomly than paying someone trained to identify why the fuse is blowing.