How Much Does It Cost to Replace an AC Capacitor?
If you need AC capacitor replacement service, it likely means your unit is more than a decade old. In most situations, AC capacitor replacement costs will total less than $400, but a broken capacitor can lead to other problems.
If your capacitor starts to fail, it can put extra pressure on the compressor and fan motor, adding to the wear and tear. In this article, we'll explore:
When you need a new capacitor, it may also mean you need a new AC unit. Have an HVAC professional take a look at your system to determine the best solution for your malfunctioning AC.
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What an AC Capacitor Does
The AC capacitor is the powerhouse of your air conditioner. It stores the power needed to get the motor running and provides ongoing power for the compressor and fan motor. Essentially, it regulates the amount of power needed for each type of operation. A start capacitor gives the initial surge of high voltage needed to start the motor, and then the run capacitor delivers continuous, lower-voltage energy for regular operation.
Your AC unit may have both a start and run capacitor or a combined dual-run capacitor that handles both functions. Dual-run capacitors are more common in newer units since they save space and reduce the need for complex wiring. When the capacitor is working properly, it helps keep energy costs down and prolongs the life of some of the most expensive parts of the unit, such as the compressor and fan motor.
Signs of a Faulty AC Capacitor
There are many signs that your AC capacitor could be failing. Some are early warning signs that allow you to avoid total AC failure, while others may only become obvious once your home starts warming up.
- No cold air. Since the capacitor controls power to the compressor, a failing capacitor may result in shortened or failed cycles. If you feel warm air coming from the vents, the capacitor is a possible source of the fault.
- The AC won't turn on. A completely dead capacitor often means the unit won't even try to start. After all, the capacitor controls power to the motor, so if there's no power, it won't start.
- Humming sounds. If your capacitor is still working but not storing enough power for the initial surge, you may notice a humming sound when the unit tries to start.
- Delayed start. If your capacitor can't store enough for the initial surge but still has some storage capacity, it may simply slow down the start process.
- AC randomly shuts off. The capacitor creates a steady supply of power, but if it's failing, it may not provide a smooth flow. If the power get interrupted or drops off, it can cause the unit to unexpectedly shut down.
AC Capacitor Replacement Costs
If you've noticed one or more of the issues mentioned above, it could mean you need an AC capacitor replacement as soon as possible. An AC capacitor costs somewhere between $10 and $50 for the part, but the labor is what drives the cost of the repair. Expect to pay about $200-$400 when replacing an AC capacitor.
AC capacitor replacement costs may vary based on the size of your unit and the make and model, so get an estimate upfront.
When to Invest in a New AC System
The AC capacitor replacement cost is nominal when compared to major repairs, but capacitors are designed to last as long as your AC unit. So, if your capacitor starts to fail, it may be a sign of other part failures headed your way.
The general rule of thumb for AC units is to replace an aging system any time the repair cost exceeds half of the cost of a new unit. The extra money you spend on installation is often repaid by more efficient cooling, and you avoid the inconvenience of an air conditioning system breakdown.
Call Us for Reliable, Same-Day AC Repair Service
If you need an AC repair, let Phoenix's most-trusted HVAC company — George Brazil Heating & Cooling — take a look. All of our repairs are backed by a 90-day labor warranty. Plus, we can typically get your AC up and running in a single visit. We also offer free estimates on new installations and convenient financing options.
Justin Stevens is a 17-year veteran of the trades and one of the masterminds behind George Brazil’s world-class training lab for technical expertise and sales training. Justin has held several titles during his tenure at George Brazil ranging from Lead Installer and Installation Manager to QA Manager and Field Operations Manager. Today, Justin is the Director of Field Operations and plays a pivotal role overseeing all of George Brazil’s field departments.
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