How much does it cost to replace a capacitor in an air conditioner?

Author: Juanita Toy  |  Last update: Tuesday, August 26, 2025

For AC capacitor replacement, anticipate spending between $150 and $400, depending on the capacitor's type and accessibility. A bad AC capacitor is a fairly minor repair, and most HVAC technicians will recommend a repair rather than replacing the unit when the capacitor is the problem.

Is it worth replacing the capacitor on an AC unit?

All AC and heat pump capacitors fail eventually.

Capacitors are one of the most common parts that need to be replaced on residential air conditioning systems. They typically provide several years of service, but you'll need to replace them at least once if you keep the same air conditioner for more than ten years.

How much should it cost to replace an AC capacitor?

The average cost to replace an AC capacitor is $180. Prices usually range from $100 to $250 depending on the type of capacitor and system you have.

What are the signs of a bad AC capacitor?

Most common first signs of a bad AC capacitor:
  • Vents Not Blowing Cold Air. ...
  • Higher Than Usual Energy Bills. ...
  • Unusual Compressor Humming Noises. ...
  • Older HVAC System. ...
  • Independent Shutdown. ...
  • Sluggish Turn On and Operation. ...
  • AC is Inoperable.

What is the lifespan of a capacitor in an AC unit?

On average, an AC capacitor might last between 5-20 years. However, some factors can affect the lifespan of your AC capacitor. For example, living in an area with high humidity levels like Florida can cause your capacitor to rust and break down more quickly.

How much does it cost to replace an AC capacitor?

Is it OK to run AC with bad capacitor?

While your AC will still work with a bad capacitor, it will struggle to function correctly. Eventually, the system will stop working altogether. Extended use can cause further damage internally. We recommend contacting a professional to handle the repairs so that you don't risk any damage to your air conditioning.

What kills an AC capacitor?

These are some of the factors that may be affecting the lifespan of AC capacitors: Heat exposure: Heat may be one of the most damaging elements for air conditioner capacitors. Exposing these units to high heat for extended periods shortens their lives and can cause significant damage to your unit.

Can I replace an AC capacitor myself?

Since AC capacitors are high-voltage components that might cause significant injury to you even if the power is out, it is strongly recommended against changing them yourself. Follow any instructions provided with your new unit purchase if you're thinking about replacing your own AC capacitor filter.

Will the fan work if the capacitor is bad?

Now, you know the answer to, “Will an AC fan run if the capacitor is bad?” It will run for a while (although not with the appropriate energy efficiency or cooling capacity) but will eventually keep your unit from turning on and functioning altogether.

What causes a capacitor to go out on an AC unit?

Power Surge or Overload

Minor power surges or other fluctuations in power also overload the capacitor and may cause it to fail. Your AC capacitor may also fail if the fan motor burns out or is somehow impeded from spinning freely.

How long does it take to replace capacitor on AC unit?

In most cases, replacing an AC capacitor will take between 1 and 2 hours. However, some more complex cases could take up to 4 hours.

How do I know if I need a new AC capacitor?

How To Recognize a Failing AC Capacitor
  1. Loud humming sounds coming from the AC condenser.
  2. Having your air conditioning shut off without warning.
  3. Burnt odors or smoke coming from the outdoor condenser.

How often do AC capacitors go out?

Air conditioner capacitors are important to keeping your house cool. Capacitors provide the power that certain A/C parts need to do their job. The average capacitor can last around 20 years, but in places like Arizona, things can be a little different, thanks to extreme heat.

How much do HVAC companies charge to replace a capacitor?

For AC capacitor replacement, anticipate spending between $150 and $400, depending on the capacitor's type and accessibility. A bad AC capacitor is a fairly minor repair, and most HVAC technicians will recommend a repair rather than replacing the unit when the capacitor is the problem.

What to do after replacing an AC capacitor?

Return the breaker to the breaker box, turn the main power on, and turn on the thermostat. Ensure the AC unit is working normally again. If you replaced the capacitor properly and the AC unit is still running slow or not dispensing cool air, there may be another problem.

What are the 2 typical signs that a capacitor is bad or has failed?

Bad AC Capacitor Symptoms Checklist
  • Smoke or a burning smell from exterior air conditioning components.
  • A humming noise from your air conditioner.
  • Your air conditioner takes some time to start a cooling cycle once you turn it on.
  • The air conditioning system shuts off at random.

Can I run my AC without a capacitor?

These components are essential for powering your air conditioner, enabling it to operate efficiently. Without capacitors, your system simply couldn't function. There are two main types of capacitors within your AC unit: start and run capacitors.

What is the life expectancy of a fan capacitor?

How long does a ceiling fan capacitor usually last? Typically, a ceiling fan capacitor ranges from 5 to 12 years. This timeframe might fluctuate depending on the make of the capacitor, how often it's used, and its exposure to elements like consistent power fluctuations.

Can I bypass a bad capacitor?

The simple answer is “No.” There are two types of capacitors–the start capacitor that signals the AC motors to start up, and the run capacitor that keeps those motors running through each cooling cycle.

How do you reset an AC capacitor?

It's a small, red button usually located on or around the unit. The button should have a clear 'reset' label. Once you find the button, press it for around three seconds and observe the AC. Check whether the AC kicks on immediately and if it doesn't, press the button again for another three seconds.

How many capacitors are in an AC unit?

Depending on how your HVAC system is built, there may be two single capacitors or one dual capacitor in your outdoor unit. Systems requiring two single capacitors need a start capacitor and run capacitor to function properly.

Will an AC fan run if the capacitor is bad?

Will AC fans run if the capacitor is bad? The answer is a resounding no. An air conditioning unit will stop working with a faulty capacitor unless you get hold of Coral Springs' air conditioning repair experts. In Florida's hot and muggy climate, the air conditioner needs to be in top condition.

What is the lifespan of an AC capacitor?

On average, AC capacitors last 10 years, but their life span can range anywhere from five years to 20.

Can a dirty filter cause a capacitor to go bad?

Dirty Filters

Clogged air filters reduce airflow from the return ducts to your evaporator coil. If you ignore the dirty filters long enough, the capacitor will overheat.

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