Thanks to all of you for all the help. I finally got to the bottom of my problem. It was the COMBUSTION VENTOR ASSEMBLY MOTOR was locked up.

My Coleman furnace would not start. The diagnostic board light was blinking 3 times. That meant the COMBUSTION AIR SWITCH FAILED TO OPEN. I ordered 2 switches from you folks. I installed it and the furnace still did not go on. I heard a loud buzzing coming from the STANDARD AIR BLEND 2 control box a...