Season 1: Wake the system up
What tends to fail
- A drain line clogged over the winter
- A capacitor that weakened while the unit sat
- A filter loaded with pollen
Do this now
- Fit a new filter and note the date on its edge.
- Clear leaves and clippings from around the outdoor unit.
- Run the AC on a mild afternoon and feel for cold air at a vent.
Stop and call: It hums but the outdoor fan never spins.