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Tell me if we get an error code flashing on boad
It looks like your furnace has what is called a smartvalve.Give me the number on your gas valve.
Then I need you to check all limits and make sure they are closed.Rollouts have a button in center to push and rest.Others can be checked by checking continuity or jumping for test. Then make sure pressure switch is closing after inducer starts.We will go from there.