AC capacitor replacement cost
Replacing an AC capacitor costs $250 to $400 with a technician, about $300 on average. The capacitor itself costs just $15 to $80; most of the bill is the service call and labor.
Quick answer
$250 – $400parts and labor
Most homeowners pay $250 to $400. If the capacitor is replaced during a tune-up or other repair, it can be as low as $100; emergency calls run up to about $500.
What you pay
| Item | Cost |
|---|---|
| Capacitor part (run or dual-run) | $15 – $80 |
| Hard start kit | $100 – $270 installed |
| Service call | $75 – $200 |
| Labor rate | $75 – $150 per hour |
- Service call and labor$150–$30083%
- Capacitor part$15–$8017%
Share of a typical project, using the middle of each range.
Signs of a bad capacitor
- The outdoor unit hums but the fan or compressor doesn't start.
- The fan starts only if pushed with a stick (don't do this).
- The AC clicks on and off or blows warm air.
- The capacitor top is swollen, bulging or leaking.
Capacitors often fail in summer heat. They're the most common AC repair.
Can you replace it yourself?
Capacitors store a dangerous charge even with the power off and must be discharged safely. Many homeowners pay a pro because the diagnosis also matters: a failing capacitor can be a symptom of a struggling compressor. If your AC is under warranty, DIY work may also void it.
How to get a fair quote
- Get at least three written quotes that list the brand, model number, size (tons or BTU) and efficiency rating.
- Ask whether the price includes permits, removal of the old unit, refrigerant, a new thermostat and any duct or electrical work.
- Ask for a load calculation (Manual J) instead of matching the old unit's size by default.
- Compare labor warranties (1 to 10 years) as well as the manufacturer's parts warranty, and register the equipment.
- Schedule non-urgent work in spring or fall, when contractors are less busy and more willing to discount.
Frequently asked questions
How much does it cost to replace an AC capacitor?
About $250 to $400 with professional labor; the part alone costs $15 to $80.
How long do AC capacitors last?
Usually 10 to 20 years, but heat, power surges and an undersized part can shorten their life.
Can a bad capacitor damage my AC?
Yes. Running with a weak capacitor makes the compressor and fan motor strain and overheat, which can lead to more expensive failures.
Sources
Prices are national averages and typical ranges from published cost data. Your price depends on your home, region, equipment and contractor, so get several written quotes. Heat & Air Costs is not an HVAC contractor; read our disclaimer.