Customer has been using someone to perform all their repairs for many years. It appears that whoever they use had recently done a gas valve, a new furnace control board and some other parts as well. The furnace was misaligned and the gas manifold was not inserted into the burners completely and triggered a rollout switch. The furnace control board was wired improperly and so heat cycle would not start. Ran combustion test. This furnace is not safe to operate and needs to be replaced. Based on our findings today, it might be time to think about getting a brand new system.