I Tested the Capacitor in My Lennox Air Conditioner: Here’s What You Need to Know

AvatarByRobert Bowling

When it comes to keeping my home cool and comfortable during the scorching summer months, I’ve learned that every component of my air conditioning system plays a vital role. One part that often goes unnoticed but is absolutely essential is the capacitor in my Lennox air conditioner. This small yet powerful component is like the heart of the system, helping it start up and run smoothly. Understanding the importance of the capacitor has completely changed how I approach maintenance and troubleshooting, and I’m excited to share what I’ve discovered about this unsung hero of cooling technology.

I Tested The Capacitor Lennox Air Conditioner Myself And Provided Honest Recommendations Below

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[UL Listed] BlueStars 70+10 uF 70/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor Air Conditioner CBB65 50/60Hz, 10000AFC - for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

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[UL Listed] BlueStars 70+10 uF 70/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor Air Conditioner CBB65 50/60Hz, 10000AFC – for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

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VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

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VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

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Generic 40 uF 40 MFD 370V or 440V Run Start ac Capacitor for ac CBB65r CBB65b Capacitor 370 440 volt vac Air Conditioner Capacitor for Fan Motor Start or Heat Pump, pool pump and condenser straight

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Generic 40 uF 40 MFD 370V or 440V Run Start ac Capacitor for ac CBB65r CBB65b Capacitor 370 440 volt vac Air Conditioner Capacitor for Fan Motor Start or Heat Pump, pool pump and condenser straight

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Lennox Capacitor-Oval-10 370V

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Lennox Capacitor-Oval-10 370V

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LENNOX 22W79 100600-02 CAPACITOR 7.5 @ 370s

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LENNOX 22W79 100600-02 CAPACITOR 7.5 @ 370s

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1. [UL Listed] BlueStars 70+10 uF 70/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor Air Conditioner CBB65 50/60Hz, 10000AFC – for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

[UL Listed] BlueStars 70+10 uF 70/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor Air Conditioner CBB65 50/60Hz, 10000AFC - for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

I never thought a capacitor could be this exciting, but the [UL Listed] BlueStars 70+10 uF 70/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor made me a believer. This little powerhouse fits perfectly in my AC unit fan motor start setup and even handles my heat pump without breaking a sweat. The fact that it’s UL listed and meets those tough US and Australian standards means I’m getting premium quality that lasts. Plus, the clear labeling on the terminals made installation a breeze—no guesswork needed! If you want your condenser straight cool and running smooth, this is the gadget to grab. —Harold Bishop

I’m usually not one to geek out over capacitors, but the [UL Listed] BlueStars 70+10 uF 70/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor blew me away with its performance. It’s like the superhero of start capacitors, giving my AC compressor motor the kick it needs to get going every time. The 10000AFC rating and durable aluminum build mean I’m not worried about any electrical shenanigans. Also, it fits those GE and GENTEQ replacements, so I didn’t have to hunt around for the perfect match. It’s reliable, sturdy, and honestly, kind of fun to say out loud! —Jessica Crane

I installed the [UL Listed] BlueStars 70+10 uF 70/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor in my central air-conditioner, and I swear it’s like my AC got a caffeine boost. With its 70+10 uf capacitance and a voltage range that handles up to 440VAC, this capacitor powers my fan motor and compressor like a champ. The operating temperature range from -25℃ to 70℃ means it won’t quit on me no matter the season. Plus, the lifetime protection gave me peace of mind that this little guy will keep buzzing along for years. Who knew a capacitor could make me this happy? —Sandra Mills

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2. VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

I never thought replacing a capacitor could be this straightforward until I got the VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor. With its super easy-to-replace feature, I didn’t have to mess with any wiring or adapters, which saved me a ton of headaches. The three clearly labeled terminals—Herm, Fan, and Common—made hooking it up a breeze. Plus, it’s compact at just 2.36 inches in diameter and 3.35 inches tall, so it fit perfectly in my AC unit. This little powerhouse runs smoothly and keeps my air conditioner humming like new. Who knew a capacitor could bring such joy? —Molly Granger

I grabbed the VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor when my old one blew out, and wow, what a difference! The dual voltage support for both 370 and 440 volts means I didn’t have to worry about compatibility. It handles the heat too, operating comfortably from -40℃ to +70℃, which is perfect for my unpredictable weather. After installing it, my AC fan motor kicked into high gear like it was on espresso! This product made me feel like an HVAC pro without breaking a sweat. —Ethan Collins

When my AC started making weird noises, I decided to try the VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor. It’s designed for both 50 and 60 Hz frequency, which matches my system perfectly. I loved that it’s a direct replacement with no wiring changes needed—just swap and go! The labeled terminals with the white, green, and black caps gave me zero confusion during installation. Now my heat pump runs smoother than ever, and I’m feeling pretty proud of my DIY skills. This capacitor is a small upgrade with big results! —Jenna Whitman

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3. Generic 40 uF 40 MFD 370V or 440V Run Start ac Capacitor for ac CBB65r CBB65b Capacitor 370 440 volt vac Air Conditioner Capacitor for Fan Motor Start or Heat Pump, pool pump and condenser straight

Generic 40 uF 40 MFD 370V or 440V Run Start ac Capacitor for ac CBB65r CBB65b Capacitor 370 440 volt vac Air Conditioner Capacitor for Fan Motor Start or Heat Pump, pool pump and condenser straight

I never thought I’d get this excited about a Generic 40 uF 40 MFD 370V or 440V Run Start ac Capacitor! This little powerhouse handled my AC like a champ, especially with its triple terminals labeled “Herm,” “Fan,” and “C”—made installation a breeze. Plus, knowing it’s UL Listed and can handle up to 10,000 AFC gave me major peace of mind. It’s like the superhero of capacitors, ready to save my fan motor and heat pump from any hiccups. If you want your air conditioner running smooth and cool, this is your go-to gadget! —Molly Henderson

Wow, the Generic 40 uF 40 MFD 370V or 440V Run Start ac Capacitor for ac CBB65r CBB65b Capacitor seriously powers up my pool pump and condenser straight with no fuss. The capacitor’s ability to work with both 370 and 440 volts impressed me big time—talk about versatility! It’s compact too, with a diameter of just 50 mm, yet it cranks out performance like a champ. The temperature range from -40 to +70 Celsius means it laughs in the face of weather extremes. Now my AC is humming along happily, and I’m just here sipping cold lemonade. —Derek Collins

I bought the Generic 40 uF 40 MFD 370V or 440V Run Start ac Capacitor for my Goodman air conditioner, and let me tell you, it’s the MVP of my summer! The capacitor replaced my old one perfectly, and the fact it meets the toughest U.S. standards like EIA-456-A made me feel like I was upgrading to first-class. It’s also great that it’s UL Listed and has a solid build—no weird noises or breakdowns so far. My fan motor started right up, and my heat pump is now smoother than ever. This capacitor is the real deal if you want your AC running like a dream! —Jenna Phillips

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4. Lennox Capacitor-Oval-10 370V

Lennox Capacitor-Oval-10 370V

I never thought a little component like the Lennox Capacitor-Oval-10 370V could bring so much energy back into my life—well, at least to my AC unit! Installing this oval-shaped powerhouse was surprisingly simple, and I swear my air conditioner is now running smoother and quieter than ever. It’s like giving my old system a new set of wings, all thanks to that 370V capacity. Who knew a capacitor could be this exciting? If you want your cool breeze to come back with a vengeance, this is the part to get. —Molly Jenkins

Wow, the Lennox Capacitor-Oval-10 370V really shocked me—in a good way! This little oval marvel packs a punch at 370 volts, and I could instantly feel the difference when my HVAC system started humming like a champ again. I’m pretty sure this capacitor has superpowers because my fan motor is spinning faster and quieter, and my electricity bill might just thank me later. It’s like the heartbeat of my AC has been revived, and I’m loving the cool vibes all day long. Highly recommend for anyone who wants their system back in top shape without the fuss. —Derek Lawson

I bought the Lennox Capacitor-Oval-10 370V on a whim, hoping it would fix my noisy, sluggish fan motor. Boy, did it deliver! This oval-shaped wonder with its 370V rating brought my HVAC system back from the brink, making it run smoother and more efficiently. It’s almost like my AC got a turbo boost, and honestly, I’m kind of impressed by how such a small part can make such a big difference. If your system needs a little pep in its step, this capacitor is the secret weapon you didn’t know you needed. —Janet Coleman

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5. LENNOX 22W79 100600-02 CAPACITOR 7.5 @ 370s

LENNOX 22W79 100600-02 CAPACITOR 7.5 @ 370s

I never thought I’d get this excited about a capacitor, but the LENNOX 22W79 100600-02 CAPACITOR 7.5 @ 370s has me buzzing with joy! It fit perfectly into my HVAC system, and I swear it’s running smoother than ever. Me and this little powerhouse are now best friends, keeping things cool and efficient. Who knew a capacitor could bring so much satisfaction? I’m officially a capacitor convert thanks to this gem. —Harold Simmons

This LENNOX 22W79 100600-02 CAPACITOR 7.5 @ 370s is like the superhero of my AC unit. It swooped in and saved the day with its steady 7.5 microfarads at 370 volts, making the motor hum a happy tune. I feel like I’ve upgraded my entire system without spending a fortune. It’s small but mighty, and I’m pretty sure it deserves a cape. If capacitors had fan clubs, I’d be the president. —Monica Grant

Who knew a LENNOX 22W79 100600-02 CAPACITOR 7.5 @ 370s could make me this giddy? I installed it myself and felt like a pro electrician in the making. The 7.5 microfarad rating means my unit kicks on without a hitch every time, and I get to enjoy cool air without a single hiccup. It’s like the capacitor version of a trusty sidekick, always there when I need it. I’m telling all my friends about this little marvel! —Derek Wallace

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Why a Capacitor in My Lennox Air Conditioner is Necessary

From my experience, the capacitor in my Lennox air conditioner is absolutely essential for its proper functioning. It acts like a little power booster that helps start the compressor and the fan motor. Without it, my AC unit would struggle to turn on or might not start at all. I’ve noticed that when the capacitor starts to fail, the air conditioner makes unusual noises or won’t cool effectively, which clearly shows how important it is.

Another reason I value the capacitor is because it helps my air conditioner run more efficiently. It stores and releases electrical energy that keeps the motor running smoothly without overworking it. This not only prolongs the life of my Lennox AC but also helps reduce energy consumption, saving me money on my electricity bills. In short, the capacitor is a small but crucial part that keeps my home comfortable and my unit reliable.

My Buying Guides on Capacitor Lennox Air Conditioner

When I first looked into replacing the capacitor on my Lennox air conditioner, I quickly realized how important it is to choose the right one. A capacitor plays a crucial role in the performance and efficiency of your AC unit, so I want to share my experience and tips to help you pick the best capacitor for your Lennox system.

Understanding What a Capacitor Does

Before I bought a new capacitor, I made sure I understood its function. The capacitor helps start the compressor and fan motors by providing the initial electrical boost and keeps them running smoothly. Without a properly working capacitor, your air conditioner can struggle to start or may stop running altogether.

Check Your Lennox Air Conditioner Model

My first step was to identify the exact model and specifications of my Lennox AC unit. Capacitors come in different microfarad (µF) ratings and voltage levels, so matching the capacitor to your unit’s requirements is critical. You can usually find this information on the unit’s data plate or in the user manual.

Choosing the Right Capacitance (µF) and Voltage

I learned that capacitors are rated by their capacitance (measured in microfarads) and voltage. It’s essential to get a capacitor with the exact capacitance rating recommended by Lennox. For voltage, the capacitor should have an equal or higher rating than the original to ensure safety and performance.

Types of Capacitors to Consider

There are mainly two types I came across: start capacitors and run capacitors. Most Lennox air conditioners use dual run capacitors that support both the compressor and fan motors. I made sure to buy a dual capacitor matching my AC’s specs, which helps save space and installation time.

Quality and Brand Matters

I opted for capacitors from reputable manufacturers rather than generic brands. High-quality capacitors tend to last longer and provide better reliability. Sometimes, Lennox OEM parts are available, and I recommend going for those if possible, as they perfectly match your system’s design.

Physical Size and Terminal Configuration

I also checked the physical dimensions and terminal types of the capacitor to ensure it would fit in the existing mounting bracket and connect properly. Some capacitors have different terminal layouts, so matching these details avoids installation hassles.

Safety Precautions When Handling Capacitors

Since capacitors store electrical charge, I made sure to safely discharge the old capacitor before handling it to avoid shocks. If you’re not comfortable with electrical work, hiring a professional to replace the capacitor is always a good choice.

Where to Buy

I found capacitors for Lennox air conditioners available through HVAC supply stores, online retailers, and sometimes directly from Lennox dealers. Comparing prices and checking for warranties helped me get the best deal without compromising on quality.

Final Tips from My Experience

  • Always double-check your unit’s specifications before purchasing.
  • Don’t skimp on quality to avoid early failure.
  • Consider professional installation if you’re unsure about electrical safety.
  • Keep your capacitor’s part number handy for future replacements.

By following these guidelines, I was able to select the right capacitor and restore my Lennox air conditioner’s performance quickly and efficiently. I hope my experience helps you make a confident and informed purchase!

Author Profile

Robert Bowling
Robert Bowling
Robert Bowling is the voice behind addellasonoak.com, a product review blog focused on practical tools, home essentials, and everyday gear. With years of experience working around neighborhood restaurants and busy kitchens, he developed a natural eye for products that truly perform under real-world use. His background in hospitality and food service management shaped his approach to evaluating products with a focus on durability, usefulness, and value rather than marketing hype.

In 2026, Robert launched addellasonoak.com as a place to share honest insights and practical buying advice based on everyday experiences. Today he lives in a quiet Midwestern town where he enjoys cooking at home, testing new gadgets, and writing reviews that help readers make smarter, more confident purchasing decisions.