A Carrier air conditioner capacitor is a critical component that ensures your HVAC system starts and runs efficiently. Acting like a battery, it stores and releases electrical energy to power the compressor and fan motors. Over time, capacitors can degrade due to heat, voltage fluctuations, or age—leading to weak cooling, humming noises, or complete system failure. Replacing a faulty capacitor is one of the most cost-effective fixes for restoring your AC’s performance, and choosing the right replacement ensures long-term reliability and safety.
Quick Product Comparison
Our Top 5 Carrier Air Conditioner Capacitor Reviews – Expert Tested & Recommended
1. Universal 10 uF Oval Run Capacitor for Single Phase Air Conditioner and Heat Pump Motors
This universal 10 uF oval run capacitor is designed for single-phase air conditioners and heat pump motors, offering reliable performance at an affordable price. Built with a rugged bakelite case, it resists moisture and heat, making it ideal for outdoor condenser units. Whether you’re fixing your home AC or an RV unit, this capacitor delivers consistent power delivery.
Key Features That Stand Out
✓ 10 uF MFD rating compatible with 370/440VAC systems
✓ Works with 50/60 Hz AC electric motors
✓ Oval shape fits standard mounting brackets
✓ Durable bakelite housing resists corrosion and heat
✓ Ideal for motor start-up and power factor correction
Why We Recommend It
We picked this as our top choice because it strikes the perfect balance between affordability, durability, and compatibility. It’s widely used in Carrier-compatible systems and other major brands, making it a versatile fix for homeowners and DIYers alike.
Best For
Homeowners with older Carrier units or RVs needing a reliable single-run capacitor replacement without overspending.
Pros and Cons
Pros:
- Easy to install with clearly marked terminals
- Excellent value for money
- Sturdy construction withstands harsh weather
- Compatible with most single-phase AC motors
Cons:
- Not suitable for dual-motor systems (requires dual-run capacitor)
- Limited warranty compared to premium brands
Customer Reviews
Customer Review: “Used this capacity in my RV AC and now the motor kicks in quick. It function is better than I expected for the value of money. And easy to install, has good thick electrical lugs. Be sure that the old capacitor is properly discharged before removal. Do not cross the leads or lugs to discharge as th”
Customer Review: “This capacitor was a lifesaver—both for my air conditioning unit and my wallet. When my condenser stopped working, I diagnosed it down to the capacitor. Instead of spending $300+ on a service call for something that takes five minutes to fix, I ordered this replacement, popped the cover, unplugged t”
2. 45+5 MFD Dual Run Round Capacitor for Condenser and Heat Pump Air Conditioners
This dual-run capacitor powers both the compressor and fan motor in Carrier and other brand heat pumps and air conditioners. With a 45+5 MFD rating and 440VAC compatibility, it replaces both 370V and 440V units, offering flexibility and peace of mind. Its compact round design fits most standard enclosures.
Key Features That Stand Out
✓ Dual-run design supports compressor and fan motor
✓ 45+5 MFD ±6% tolerance for precise performance
✓ Compatible with 370V and 440V systems
✓ Operating range: -40°F to 158°F
✓ Meets strict USA standards (EIA-456-A, IEC 60252-1)
Why We Recommend It
We named this our Editor’s Choice due to its proven reliability, wide compatibility, and strong warranty. It’s a go-to for HVAC technicians and DIYers who want a hassle-free replacement that lasts.
Best For
Homeowners with Carrier heat pumps or dual-motor AC systems looking for a durable, technician-approved capacitor.
Pros and Cons
Pros:
- Replaces two capacitors in one (compressor + fan)
- 5-year warranty for added confidence
- Robust build handles extreme temperatures
- Clear labeling simplifies installation
Cons:
- Slightly larger than some OEM caps—check fitment
- May require basic electrical knowledge to install safely
Customer Reviews
Customer Review: “Works and fits exactly as it should qt q great price, and with a 5 year warranty.”
Customer Review: “Simple install working as expected I Replaced the original with a cheaper one that only lasted me 5 months so I am hoping that the extra money spent will pay off .”
3. 45/5 uF Dual Run Capacitor for AC Unit Fan Motor and Heat Pump Condenser
VEXUNGA’s 45/5 uF dual-run capacitor is a budget-friendly yet high-performing option for Carrier-compatible systems. It supports both compressor and fan operations, works across 370/440VAC, and features a compact CBB65 design. Great for DIY repairs when you need quality without the premium price tag.
Key Features That Stand Out
✓ Dual-run functionality for compressor and fan
✓ 45+5 uF ±6% accuracy
✓ Works with 370V and 440V systems
✓ Size: 2.36″ diameter x 3.35″ height
✓ Wide operating temperature: -40°C to +70°C
Why We Recommend It
This capacitor earns our “Best Budget” title because it delivers reliable performance at a fraction of the cost of OEM parts. It’s perfect for cost-conscious homeowners who still want safety and efficiency.
Best For
Budget-minded users needing a quick, reliable fix for their Carrier AC or heat pump without sacrificing essential performance.
Pros and Cons
Pros:
- Very affordable compared to branded alternatives
- Easy drop-in replacement for most units
- Clear terminal markings reduce installation errors
- Solid build quality for the price
Cons:
- Shorter warranty period (typically 1–2 years)
- Less brand recognition than major OEMs
Customer Reviews
Customer Review: “This A/C capacitor was clearly and accurately described, exact equivalent replacement part, good quality, very easy to install, works perfect! Very reasonable price, very fast shipping.”
Customer Review: “Watched a YouTube video of the most common Central Air not working fixes. I went out and checked mine as it has not worked a couple of years. Sure enough, the main fan was working, but touching the compressor tube, you could feel it pulling every second or so, but not starting. Removing the old p”
4. BOJACK 35+5 uF Dual Run Capacitor for AC Motor and Condenser Fan Start
BOJACK’s 35+5 uF dual-run capacitor is a reliable mid-range option for Carrier and other brand AC units. It efficiently powers both the compressor and condenser fan, features clear terminal labeling, and is built to withstand harsh outdoor conditions. Ideal for homeowners who want trusted performance without overspending.
Key Features That Stand Out
✓ 35+5 uF dual-run design
✓ Compatible with 370V/440V systems
✓ Compact size: 1.97″ diameter x 4.14″ height
✓ Operating range: -40°C to +70°C
✓ CBB65 aluminum casing for durability
Why We Recommend It
We recommend this capacitor for its consistent performance, ease of installation, and strong customer feedback. It’s a favorite among DIYers who’ve been quoted high service fees for simple capacitor swaps.
Best For
Homeowners with mid-sized Carrier units looking for a balance of price, performance, and brand reliability.
Pros and Cons
Pros:
- Affordable alternative to expensive service calls
- Terminals clearly marked (C, HERM, FAN)
- Quick startup and stable operation
- Compact fit for tight spaces
Cons:
- Not ideal for larger commercial units
- Warranty details not always clearly stated
Customer Reviews
Customer Review: “This BOJACK 35+5uF dual run capacitor was exactly what I needed to get my AC unit running again. It replaced the old capacitor perfectly — same specs, solid build, and the terminals were clearly marked. Installed in just a few minutes and my fan and compressor kicked on immediately.I like that it su”
Customer Review: “I was initially told that replacing the capacitor for my system would cost me over $60, but I decided to give the BOJACK 35+5uF Dual Run Capacitor a try, and I’m so glad I did. Not only did I get it for a much lower price, but it’s been working flawlessly since I installed it.The capacitor arrived w”
5. 45+5 uF Dual Run Capacitor with 10-Year Coverage for Heat Pump Air Conditioners
Backed by an impressive 10-year coverage, this QYCKFIXR dual-run capacitor is built for long-term reliability in Carrier heat pumps and air conditioners. With a 45+5 uF rating and compatibility across 370/440VAC systems, it’s engineered to meet the toughest USA standards. Perfect for those who want peace of mind and durability.
Key Features That Stand Out
✓ 10-year manufacturer coverage
✓ 45+5 uF dual-run design
✓ Replaces both 370V and 440V capacitors
✓ Meets EIA-456-A and IEC 60252-1 standards
✓ Robust construction for extreme climates
Why We Recommend It
The decade-long warranty sets this apart from competitors. If you’re investing in your home’s cooling system for the long haul, this capacitor offers unmatched confidence and performance.
Best For
Homeowners planning to stay in their homes long-term or those with high-end Carrier systems who prioritize longevity and warranty protection.
Pros and Cons
Pros:
- Industry-leading 10-year coverage
- Premium build quality
- Excellent for heat pumps and dual-motor systems
- Clear installation instructions included
Cons:
- Higher upfront cost than budget options
- Overkill for temporary or rental properties
Customer Reviews
Customer Review: “Standard replacement if you know what you’re buying. I slapped it onto my unit and she fired right up. So far so good after a week of operation.”
Customer Review: “Excellent. Worked perfectly. Hopefully i won’t need another one for a while.”
Complete Buying Guide for Carrier Air Conditioner Capacitor
Essential Factors We Consider
When choosing a Carrier air conditioner capacitor, we prioritize compatibility, voltage rating, capacitance (measured in microfarads or MFD/uF), physical size, and safety certifications. Always match the uF rating and voltage (370V or 440V) of your original capacitor. Dual-run capacitors power both the compressor and fan, while single-run types handle one motor. Check dimensions to ensure it fits your unit’s housing, and look for units meeting EIA or IEC standards for safety.
Budget Planning
Capacitors range from under $15 for basic models to over $40 for premium, long-warranty options. While it’s tempting to go cheap, investing in a quality capacitor can prevent repeat failures and costly service calls. We recommend spending a little more for dual-run capacitors with clear labeling and at least a 2–5 year warranty—especially if you’re not an experienced DIYer.
Final Thoughts
Replacing a faulty capacitor is one of the simplest and most effective ways to restore your Carrier AC’s performance. Whether you choose our Best Choice for universal use or the 10-year covered model for long-term reliability, always prioritize safety: turn off power at the breaker, discharge the old capacitor, and double-check wiring. With the right part, your system will run smoothly for seasons to come.
Frequently Asked Questions
Q: How do I know if my Carrier AC capacitor is bad?
A: Common signs include the AC unit humming but not starting, weak airflow, frequent cycling, or the compressor overheating. You can also use a multimeter to test capacitance or visually inspect for bulging, leaking, or burnt terminals.
Q: Can I replace a capacitor myself?
A: Yes—if you have basic electrical knowledge and tools. Always turn off power at the breaker, discharge the old capacitor safely (using an insulated screwdriver across terminals), and match the uF and voltage ratings exactly. When in doubt, consult a licensed technician.
Q: What’s the difference between a run capacitor and a start capacitor?
A: A run capacitor stays connected during operation to maintain motor efficiency, while a start capacitor provides a boost only during startup and disengages afterward. Most modern Carrier units use dual-run capacitors that handle both functions.
Q: Are all capacitors compatible with Carrier systems?
A: Not necessarily. While many universal capacitors work with Carrier units, always verify the uF rating, voltage, and physical size against your original. Using the wrong capacitor can damage your motor or void your warranty.
Q: How long do AC capacitors last?
A: Typically 10–15 years, but heat, power surges, and humidity can shorten lifespan. If your AC is over 10 years old and struggling, a capacitor replacement is often the first fix to try.
Don’t let a failing capacitor leave you sweating this summer. Whether you’re fixing a Carrier heat pump or central AC, our top-rated picks offer reliable performance, easy installation, and great value. Click any “Check Price” button above to find the right capacitor for your system—and get your cool air flowing again fast!