The average cost to replace an AC capacitor is $250. Prices usually range from $200 to $400 depending on the type of capacitor and system you have.
The AC capacitor stores electric energy to power the compressor and fan motors when you start your air conditioner.
AC capacitor replacement is a minor repair, and it’s often diagnosed if your AC won’t start, takes too long to cool, shuts off without warning, or acts strangely.
The cost of AC capacitor replacement depends on unit type, labor rates, and more.
Replacement is not DIY-friendly because of the risk of injury and damage to your AC unit.
Replacing an AC capacitor costs $250 on average, including the price of the capacitor plus labor to install it. However, the total cost could be as low as $200 or as high as $400, depending on the type of AC capacitor and the complexity of the replacement. AC capacitor replacement costs mostly consist of labor because the capacitor itself rarely exceeds $45.
AC capacitors typically last about 10–20 years. Your AC capacitor replacement cost will depend on the exact type of unit you need. Run, start, and blower capacitors tend to be the least expensive, while dual-run and heat capacitors could cost an extra $20 or more. If you’re unsure what type of capacitor you have, an HVAC technician can help.
Here’s a breakdown of AC capacitor costs by type:
AC Capacitor Type | Average Cost Range | Description |
---|---|---|
Run capacitor | $8–$30 | Helps the motor run smoothly and efficiently |
Dual-run capacitor | $15–$45 | Handles the compressor and the outdoor fan motor |
Start capacitor | $9–$25 | Provides a large initial burst of energy when the motor turns on |
Blower capacitor | $9–$12 | Helps the indoor blower motor run efficiently |
Heat pump capacitor | $15–$25 | Found in a heat pump system |
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A local HVAC expert will charge between $200 and $400 in labor alone to replace your capacitor. Keep in mind that many professionals charge a flat rate for an AC capacitor replacement, which includes the cost of the capacitor itself. This all-inclusive flat rate will often be between $300 and $600. If the fix is an emergency or requires the contractor to come to your house on a weekend or holiday, you’ll pay an additional fee.
Each HVAC pro sets the rate for replacing an AC capacitor. Some contractors include a diagnostic fee to assess the problem, while others only charge for the labor to replace the part. When contacting pros for quotes, ask them if they charge a diagnostic fee and what that service includes.
HVAC Repair Fee Type | Average Cost Range |
---|---|
Diagnostic | $100–$150 |
Labor | $60–$250 |
Once you hire an HVAC pro near you, their work will consist of:
Inspecting and diagnosing the AC unit
Removal and disposal of the old, faulty capacitor
Installing and testing the new capacitor
Plus, an HVAC technician can point out any other issues they might notice with your AC system.
You’ll pay for the AC capacitor and the labor to install it, but the exact costs will vary based on a few important factors.
HVAC technicians may charge extra if the air conditioner unit is in a particularly hard-to-reach spot. This isn’t often a concern for residential homes, but you may encounter extra fees if the pros need to clear away bushes or move aside clutter. Ensure your AC units are clear before a technician visits to avoid extra charges.
When the weather warms up during the summer months, many homeowners turn on their AC and discover they have problems. This leads to a higher demand for HVAC technicians, who increase their maintenance and repair rates in response. Call an AC repair company in the spring before demand increases to catch problems early and save on labor.
During heat waves, the demand for HVAC services also spikes as more people experience AC issues. To stay cool during a heat wave, you may need emergency service to restore your cooling system quickly. Emergency repairs often come with additional fees.
Some air conditioner brands cost more than others based on quality, materials, and other factors. For example, Trane and Lennox units tend to be most expensive, while Goodman and York are more budget-friendly picks. Capacitors for higher-cost brands will be more expensive as a result.
If you have an older AC unit, especially an outdated model, it may be more difficult to source a replacement part for it, which can raise prices. It’s also common for a pro to find other issues while replacing the capacitor in an older AC unit.
Location tends to affect labor costs, as well as unit costs to a lesser extent due to factors like shipping and availability. Your home’s location will impact component costs like new capacitors, too. Get a few different quotes from contractors in your region to compare fees.
Capacitors are relatively affordable and usually don't have their own warranty. However, the manufacturer's warranty for your entire AC unit might cover capacitor replacement. Alternatively, if you have a home warranty that covers your AC unit, it may be less costly to submit a claim than to pay for the replacement yourself.
If your AC capacitor has problems, it won't be long before other parts in your AC unit begin to fail as well. HVAC repairs cost much more when multiple parts must be repaired or replaced. Some common AC repairs include:
Damaged compressor: $750–$2,000
Thermostat replacement: $150–$350
Fan coil replacement: $600–$2,000
Burnt-out motor: $200–$700
Have your HVAC system inspected regularly and replace a damaged capacitor right away to avoid the higher costs of additional repairs.
If you pride yourself on being handy, you can test an AC capacitor and replace it yourself for around $60 to $100, including the cost of the unit and the tools you’ll need for installation. This can save you $200 to $400 in labor costs, but taking matters into your own hands requires preparation and extreme caution.
If you DIY without proper HVAC and electrical knowledge, you risk leaving your home without heating or cooling. Plus, you could get seriously injured or electrocuted. The AC capacitor could also leak toxic liquids or burst, potentially causing more serious injury. Contact a local air conditioning repair specialist to save time and eliminate possible risks.
It’s important to note that this isn’t one of those DIY tasks that you can figure out as you go. You should not attempt it unless you’ve done your homework, are fully equipped with the proper safety gear, and understand electrical best practices and the inner workings of an AC unit.
HVAC capacitor replacement costs are relatively inexpensive. Still, there are some ways to minimize costs:
Buy the capacitor yourself: If you’re a bit handy, you can buy the replacement capacitor on your own. Just make sure it matches your AC unit’s specifications and have it ready for the technician.
Keep up with regular maintenance: Scheduling regular check-ups for your AC can catch capacitor issues early, potentially avoiding emergency service charges.
Plan for off-season repairs: If you can, try to schedule the replacement during the spring or fall when HVAC services are usually less busy.
Join a maintenance plan: Many companies offer HVAC maintenance plans that include regular check-ups and discounted repairs. Joining one of these plans can save you money over time and keep your system running smoothly.
Get multiple quotes: Get quotes from at least three contractors to find the best rate in your area.
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When the capacitor fails, the AC unit can’t operate at all. The most common sign is the thermostat forcing the blower to turn on, but it only circulates room-temperature air. The AC unit also won’t make any noise or indication that it’s on. Sometimes, the compressor might hum as it attempts to work, but without any results.
Before a full shutdown, a faulty capacitor can cause your AC to struggle while turning on. The unit might also shut down in the middle of a cooling cycle.
AC capacitors last between five and 15 years, with an average lifespan of 10 years. Most people only need to replace a capacitor once during an AC unit’s lifetime. You don’t need to replace the capacitor unless something is wrong with it, which an HVAC repair pro can diagnose.
Yes, you can potentially save $60 to $200 by handling your own air conditioner capacitor installation. However, capacitor replacement comes with the risk of electric shock. Only attempt this if you have the knowledge and protective gear to carry it out safely. Otherwise, we recommend hiring an HVAC pro with the experience to properly diagnose the issue and avoid damaging other parts of your AC unit.
Your AC capacitor should last throughout the lifespan of your HVAC system, but a few factors can cause it to fail prematurely. For example, if the capacitor's voltage rating doesn’t match the AC’s needs, it’ll likely be kaput before its time. It also helps to keep outdoor units out of direct sunlight, as prolonged heat exposure might cut your capacitor’s lifespan short. Stay proactive with an annual tune-up from an HVAC company for the health of your entire system.
A trained HVAC professional with experience takes about an hour to replace the capacitor on an AC unit. If you're attempting to replace your AC capacitor as a DIY project, especially for the first time, expect it to take longer. Remember that you won’t be able to use your AC to cool your house during this time.
The safest option is to let a technician conduct the inspection. However, if you are certain that the capacitor failed and you take all precautions to avoid electric shock, you can take a look yourself. Usually, you can open the front panel of the unit and use a flashlight to find the small capacitor cylinder. It should have a sticker on it that provides its product number, capacity, and similar information that you can note when talking to a contractor.