Went for a furnace maintenance call today. When going to furnace tested for static pressure. Static was failing over the max rating. Had adjusted dampers, open vents, and replaced filters. All electrical components pass for system. Temp split for system for manufacture specifications. Cleaned drain line, pressure switch hose, and flame sensor. Did a co test, no co was detected when testing. Inspected that heat exchanger no cracks or wear and tear. System is up and running before leaving.