Today I looked at both heat and cooling. Although the system test in tolerance for deltas it has some issues. Concerns 1 dirty duct work 2 high inrush 3 wore out contactor 4 wore out inducer motor If your not thinking about system replacement I recommend adding soft start and replacing component's and cleaning duct work On this job I tested the system in cool and heating. The system test in tolerance as far deltas. But she is not ready to replace and wants to clean the duct first. I'm also adding a new soft start and ordering a new inducer motor. Pausing call untill inducer motor comes in . Shes having ducts cleaned this 29th at 10am