Upon arrival unit was operational and heating. Started by calling for heat went up to the furnace and checked amps the blower amps were in range and tie inducer amps were slightly high but not at the max. Cleared condensation lines and temp split was in range, blower wheel was free of oil.safety switches were working properly. Ducting was R-4 explained to the homeowner that it’s outdated ducting. Upon departure unit was operational and heating.