Why I Trust High-Quality Capacitors for My Lennox AC: An Expert’s Insights

When it comes to keeping my home comfortable, I’ve learned that every component of my HVAC system plays a crucial role, especially the often-overlooked capacitor in my Lennox air conditioning unit. This small but mighty component is essential for ensuring that my AC runs smoothly and efficiently. Without it, my cool sanctuary could quickly turn into a sweltering nightmare. In this article, I want to share my insights on capacitors, specifically tailored for Lennox AC units. I’ll explore why they matter, how they function, and what to look for when choosing the right one for your system. Join me as we dive into the world of capacitors, unraveling their significance in maintaining a perfectly chilled home.

I Personally Evaluated The Lennox AC Capacitor And Shared My Honest Recommendations Below

1. BOJACK 35+5uF 35 5 MFD ±6% 370V/440V CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

When it comes to maintaining or upgrading my HVAC system, I’ve learned the importance of having reliable components that can withstand the test of time. The BOJACK 35+5uF Dual Run Circular Start Capacitor stands out as a remarkable option for anyone in need of a durable, efficient, and high-performance capacitor for their air conditioning units or fans. Having a dual run capacitor means that this product effectively supports both the compressor motor and the fan, ensuring smooth operation and improved energy efficiency.

The specifications of the BOJACK capacitor are impressive, to say the least. With a capacitance rating of 35+5uF and a tolerance of ±6%, it provides reliable performance under various conditions. The ability to operate at voltages of 370V/440V makes it suitable for a wide range of applications, which is something I find particularly appealing. Whether I’m working on a residential air conditioning system or a commercial condenser, this capacitor is designed to handle the job with ease.

One of the standout features that I appreciate is its robust design. The capacitor’s dimensions—less than 1.97 inches in diameter and 4.14 inches in height—make it compact enough to fit in tight spaces, yet it doesn’t compromise on performance. Additionally, the operating temperature range of -40 ℃ to +70℃ (-104℉ to +158℉) indicates that it can handle extreme conditions without any issues. This is crucial for anyone living in areas with fluctuating temperatures, as I can trust that the capacitor will perform reliably regardless of the climate.

Safety is always a top priority for me, and the BOJACK capacitor doesn’t disappoint. With a safety rating of 10,000 AFC, I can feel confident about its ability to protect my system from electrical surges or failures. The three terminals labeled “Herm”/”H” for the compressor motor, “Fan”/”F” for the fan, and “C” for the common line make installation straightforward. Even if I’m not a professional HVAC technician, I can easily identify where to connect the wires, which simplifies the repair or replacement process.

In summary, the BOJACK 35+5uF Dual Run Circular Start Capacitor is an excellent choice for anyone looking to enhance the efficiency and reliability of their HVAC systems. Its high-quality construction, impressive specifications, and ease of installation make it a smart investment. If you’re in the market for a durable capacitor that can handle the demands of both air conditioning and fan applications, I wholeheartedly recommend considering this product. It has everything you need to ensure your systems operate at their best, and I can assure you, it’s worth every penny.

Feature	Description
Capacitance	35+5uF ±6%
Voltage Rating	370V/440V
Dimensions	Diameter < 1.97 inch, Height < 4.14 inch
Operating Temperature	-40 ℃ to +70℃ (-104℉ to +158℉)
Safety Rating	10,000 AFC
Terminal Labels	“Herm”/”H” (Compressor), “Fan”/”F” (Fan), “C” (Common)

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2. Lennox 100335-12 – 45 + 5 uf MFD 440 Volt VAC Replacement Round Dual Run Capacitor

When I first came across the Lennox 100335-12 – 45 + 5 uf MFD 440 Volt VAC Replacement Round Dual Run Capacitor, I was intrigued by its specifications and the potential benefits it could offer. As someone who values efficiency and reliability in electrical components, this capacitor caught my attention for several reasons. The features it boasts are not only impressive but also essential for anyone looking to replace or upgrade their HVAC systems, ensuring optimal performance and longevity.

First and foremost, the Lennox 100335-12 is a non-PCB capacitor, which is a crucial feature for those of us who are environmentally conscious. PCB (polychlorinated biphenyls) capacitors have been linked to environmental and health hazards, and the shift to non-PCB alternatives is a significant step forward. This ensures that I am making a responsible choice that aligns with modern safety standards.

The product is individually boxed, which speaks volumes about the care taken in its packaging. This not only helps protect the capacitor during transit but also makes it incredibly convenient for me as a user. When I need a replacement, having it pre-packaged means less hassle and more assurance that it will arrive in pristine condition.

One of the standout features for me is the ¼” quick disconnect terminals. These standard connections make installation straightforward, even for someone who may not be a professional electrician. The ease of installation means that I can spend less time troubleshooting and more time enjoying the improved efficiency of my HVAC system.

Moreover, the Lennox capacitor is UL & CSA approved, which means it has been rigorously tested for safety and performance. This is a significant reassurance for me as a consumer because it underscores the reliability of the product. Knowing that the capacitor meets these stringent safety standards gives me confidence in its durability and functionality.

The operational frequency of 50/60 Hz is another feature that aligns perfectly with my needs. This compatibility ensures that the capacitor can work seamlessly with various electrical systems, providing versatility and reliability. Additionally, the operating temperature range of -40 to +70°C indicates that this capacitor can withstand extreme conditions, making it suitable for a wide variety of environments.

What I find particularly compelling is the compatibility of this capacitor with a multitude of old and contemporary models. From GE Industrial Capacitors to various models from Lennox and Mars, this capacitor serves as a reliable replacement for numerous specifications. This compatibility makes it an ideal choice for anyone looking to replace older, potentially failing capacitors without needing to search far and wide for a specific model.

In summary, the Lennox 100335-12 – 45 + 5 uf MFD 440 Volt VAC Replacement Round Dual Run Capacitor is an impressive product that combines safety, efficiency, and reliability. For anyone in the market for a replacement capacitor, I genuinely believe that this product stands out. Its thoughtful features cater to both residential and commercial users, ensuring that it not only meets but exceeds expectations.

So if you’re contemplating a capacitor replacement, I would encourage you to consider the Lennox 100335-12. It’s not just a component; it’s an investment in the performance and reliability of your HVAC system. With its robust features and proven compatibility, you can’t go wrong with this choice!

Feature	Description
Type	Non-PCB Capacitor
Packaging	Individually Boxed
Connection Type	¼” Quick Disconnect Terminals
Approval	UL & CSA Approved
Operating Frequency	50 / 60 Hz
Operating Temperature	-40 to +70°C
Compatibility	Compatible with various old and new models

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3. BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

When it comes to maintaining or upgrading your air conditioning unit, selecting the right components is essential for optimal performance. I recently came across the BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor, and I must say, it has all the features that make it a standout choice for anyone looking to enhance their AC motor run or fan start capabilities. This capacitor is designed for efficiency, durability, and reliability, making it a smart addition to any HVAC system.

The specifications of the BOJACK capacitor are impressive. With a capacitance of 45+5uF and a voltage rating of 370V/440V, it is built to handle a variety of applications. The ±6% tolerance ensures that it operates within safe parameters, providing peace of mind. I appreciate the robust construction, as the capacitor is rated for an operating temperature range from -40°C to +70°C (-104°F to +158°F). This wide range makes it suitable for various climates, ensuring that it won’t fail in extreme weather conditions.

One of the standout features for me is the safety rating of 10,000 AFC (Amps Fault Current). This high safety rating indicates that the BOJACK capacitor can withstand potential electrical faults, significantly reducing the risk of damage to my AC unit. It’s crucial to have reliable safety features, especially when dealing with electrical components, and this capacitor delivers on that front.

The design of the capacitor also deserves a mention. With a diameter of 65 mm (2.56 inches) and a height of 95 mm (3.74 inches), it fits comfortably in most spaces where capacitors are typically installed. The three terminals on the top are clearly labeled as “Herm”/”H” for the compressor motor, “Fan”/”F” for the fan, and “C” for the common line. This labeling makes installation straightforward, even for those who may not be experts in HVAC repairs.

Compatibility is another critical factor when choosing a replacement capacitor, and the BOJACK does not disappoint. It serves as a replacement for numerous models, including 97F9895, Z97F995, and several others. This versatility makes it an excellent option for various systems, allowing me to have confidence that it will fit my specific needs without any hassle.

In summary, the BOJACK 45+5 uF capacitor is an exceptional choice for anyone looking to ensure their AC motor or fan operates efficiently and safely. Its robust safety features, wide operating temperature range, and compatibility with multiple models make it a reliable option for both DIY enthusiasts and professionals. I highly encourage anyone in need of a capacitor to consider this product. It’s not just a purchase; it’s an investment in the longevity and performance of your cooling system.

Feature	Details
Capacitance	45+5 uF
Voltage Rating	370V/440V
Tolerance	±6%
Operating Temperature	-40℃ to +70℃ (-104℉ to +158℉)
Safety Rating	10,000 AFC
Dimensions	Diameter 65 mm (2.56 in), Height 95 mm (3.74 in)
Terminal Labels	Herm/H, Fan/F, C
Compatible Models	97F9895, Z97F995, etc.

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4. SUREPHON 45+10 uF 45/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor CBB65 Works for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

As I delve into the specifics of the SUREPHON 45+10 uF Dual Run Start Capacitor, I can’t help but appreciate the thoughtful engineering and design that has gone into creating this product. With a capacitance rating of 45+10 MFD and a voltage tolerance of 370V/440VAC, this capacitor is tailored for reliable performance in various applications, including AC unit fan motors, heat pumps, and condenser systems. For anyone relying on these cooling systems, the peace of mind that comes with using a high-quality capacitor is invaluable.

One of the standout features of this capacitor is its impressive longevity. Designed to operate effectively for over 15 years, it’s a product that promises durability and reliability. I find this particularly appealing, as it means less frequent replacements and a lower total cost of ownership over time. Furthermore, the five-year guarantee adds an extra layer of confidence in its quality, which is a significant consideration for anyone making an investment in their home or business’s climate control systems.

In terms of dimensions, the capacitor is compact enough to fit into most standard installations, with a diameter of 63.5 mm (2.5 inches) and a height of 105 mm (4.13 inches). This size makes it versatile for various setups without compromising on performance. Whether I’m replacing an old capacitor or installing one for the first time, I appreciate the ease of integration this product offers.

Operating under a wide temperature range of -40 to +70 °C (-40F to 158F) ensures that this capacitor can handle extreme conditions. This feature is particularly crucial for those living in areas with fluctuating temperatures, as it guarantees consistent performance throughout the year. Knowing that the SUREPHON capacitor can withstand these extremes gives me confidence that my HVAC systems will run smoothly regardless of outside conditions.

Moreover, the capacitor is UL approved (Certificate No. E325324), which signifies that it meets stringent safety standards. This certification is essential for anyone concerned about safety and reliability in their electrical components. It reassures me that I’m investing in a product that has undergone rigorous testing and meets industry benchmarks.

if you’re on the lookout for a reliable, long-lasting capacitor to support your air conditioning or heating systems, I wholeheartedly recommend considering the SUREPHON 45+10 uF Dual Run Start Capacitor. With its excellent features, durability, and safety certifications, it’s a smart investment that can lead to enhanced performance and peace of mind. Don’t hesitate to make this purchase; it could very well be the upgrade your system needs!

Feature	Details
Capacitance	45+10 MFD
Voltage Rating	370V/440VAC
Operating Temperature Range	-40 to +70 °C (-40F to 158F)
Dimensions	Diameter 63.5 mm (2.5 inch), Height 105 mm (4.13 inch)
Durability	Designed to last over 15 years
Warranty	5 years guarantee
Safety Certification	UL approved (E325324)

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Why a Capacitor for Lennox AC is Essential for My Comfort

As someone who relies heavily on my Lennox air conditioning system, I’ve learned that the capacitor plays a crucial role in ensuring that my home stays cool and comfortable, especially during the hot summer months. The capacitor acts like a battery, providing the necessary electrical energy to start the compressor and the fan. Without it, my AC unit wouldn’t be able to function effectively, leaving me in an uncomfortable situation.

When I noticed my air conditioner struggling to start, I quickly realized that the capacitor might be the culprit. Replacing it not only helped my AC unit run more smoothly, but it also improved its overall efficiency. I found that my energy bills decreased, and my system was no longer overworking itself, which can lead to more extensive and costly repairs down the line.

In my experience, investing in a high-quality capacitor for my Lennox AC has been a game changer. It has not only extended the lifespan of my unit but has also given me peace of mind knowing that I can rely on my AC when I need it most. Regular maintenance and timely replacement of components like the capacitor have ensured that I can enjoy a cool, comfortable home without interruption.

Buying Guide for Capacitor for Lennox AC

Understanding Capacitors

When I first encountered issues with my Lennox AC, I learned that the capacitor plays a crucial role in the system. It stores electrical energy and helps start the compressor and fan motor. Without a functioning capacitor, my AC system wouldn’t operate efficiently or at all.

Identifying the Right Capacitor

Before purchasing a capacitor, I had to identify the specific type required for my Lennox AC unit. I noticed that capacitors come in different ratings, such as microfarads (µF) and voltage ratings. I made sure to check the specifications on the old capacitor or the unit’s manual to ensure compatibility.

Types of Capacitors

In my search, I discovered that there are different types of capacitors, including dual run capacitors and single run capacitors. Dual run capacitors are particularly useful for systems that require both compressor and fan motor support. Understanding the type I needed helped streamline my shopping process.

Consider the Brand Compatibility

I realized that while many capacitors might fit, choosing one that aligns with Lennox specifications was essential. During my research, I found that branded components often ensure better reliability and performance, so I kept brand compatibility in mind.

Checking the Quality

Quality is critical when it comes to HVAC components. I learned to look for capacitors that are well-reviewed for their durability and performance. I avoided off-brand options that seemed too cheap, as they might not last long and could lead to further issues down the road.

Understanding Installation Requirements

As I contemplated the installation process, I considered whether I would do it myself or hire a professional. I found that some capacitors are easier to install than others. If I opted for a DIY installation, I made sure to read guides and watch tutorial videos to familiarize myself with the process.

Price Considerations

When I started comparing prices, I noticed a range of costs depending on the brand and type of capacitor. Setting a budget helped me narrow down my options without overspending. I also kept an eye out for warranties, as these can offer additional peace of mind.

Where to Buy

I explored various purchasing options, including local HVAC supply stores, online retailers, and Lennox authorized dealers. Each option had its benefits. Local stores provided immediate availability, while online retailers often had a broader selection.

Final Thoughts

After going through this process, I felt more informed about buying a capacitor for my Lennox AC. I understood the importance of compatibility, quality, and installation. With this knowledge, I could confidently make a purchase that would help restore my AC to optimal performance.

Author Profile

Rita Lewis

Hi, I’m Rita Lewis. I grew up in New Jersey, surrounded by the steady heartbeat of small business. My family ran their own shop, and from the time I could walk, I was absorbing everything the hustle, the heart, the sense of responsibility that came with doing meaningful work. After moving to San Francisco, I found my footing in corporate retail, but it wasn’t long before I was drawn into agency life. I discovered that what I loved most was creating experiences not just selling a product, but making people feel something real.

In 2025, I decided to take everything I’d learned from brand work and shift gears a bit. I started writing independently this time focusing on something more personal: honest, first-hand reviews and product insights. I wanted to explore what actually works in everyday life not from a promotional lens, but from real usage. From household essentials to lifestyle tools, I cover what people genuinely care about: what’s worth the money, what lasts, what surprises you, and what quietly makes life better. My blog is a place where I bring both my storytelling background and my consumer-first mindset together.

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