Completed furnace maintenance and inspection. I checked all components and amp draws. Cleaned up furnace and flame sensor. I found no issues with furnace at this time other than dust getting inside system. Ran heat pump and found common wire to capacitor burnt. Contactor had rust building up as well. Found out that there’s a sprinkler system causing this. With customer permission I replaced Contactor, fixed burnt wire, added hard start kit and added foam tap to help keep the water out. All operations were within manufacture specs at departure.