Sample snapshot · Heating & AC
Most likely a failed capacitor
Typical repair$100–$400
Why it fits: Carrier and Trane both point to a failed capacitor when a motor hums but won’t start.
What the pro will check: The capacitor, with a meter.
Repair or replace?
Repair or replace depends on its age. ENERGY STAR suggests considering replacement when an AC is more than 10 years old. Not sure how old yours is? The pro can read it from the label on the unit.
Typical replacement$5,000–$12,000
Also possible
Failed contactor$150–$400
Typical repair. The outdoor unit won’t start, or it clicks or buzzes.
Outdoor fan motor$200–$700
If it needs replacing. The outdoor fan won’t spin, or it grinds before it stops.
Ask the pro
- What’s your service-call fee, and does it go toward the repair?
- What do you think is causing it, and how did you confirm it?
Cost ranges are estimates from public sources, not quotes. Your pro will give you exact pricing.