Why Choosing the Right Capacitor for My Lennox AC Unit Transformed My Home Comfort: An Expert’s Insight

As a homeowner, few things are as crucial to my comfort as a properly functioning air conditioning unit. Living in a region where temperatures can soar, I quickly learned that the heart of my Lennox AC unit is not just its compressor or the refrigerant, but a small yet mighty component known as the capacitor. This unsung hero plays a pivotal role in ensuring that my system runs smoothly and efficiently, providing a cool refuge on sweltering summer days. In this article, I’ll share insights into the significance of capacitors in Lennox AC units, exploring how they work, why they’re essential, and what to consider when it’s time for a replacement. Whether you’re a seasoned DIY enthusiast or just starting to understand your air conditioning system, I hope to shed light on this vital component that helps keep my indoor oasis comfortable and inviting.

I Personally Tested The Capacitor For My Lennox AC Unit And Here Are My Honest Recommendations

1. SUREPHON 40+5 uF 40-5 MFD ±5% 370V-440VAC Dual Run Start Capacitor CBB65 Works for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

When it comes to ensuring that my air conditioning unit runs smoothly and efficiently, I can’t stress enough the importance of having a high-quality capacitor. That’s why I was thrilled to come across the SUREPHON 40+5 uF 40/5 MFD ±5% 370V/440VAC Dual Run Start Capacitor. This product is specifically designed for AC unit fan motor start applications, heat pumps, and condenser systems, making it a versatile option for anyone looking to maintain or improve their HVAC system. Its dual run capability gives me peace of mind, knowing that it can handle both the compressor and fan motors without any hassle.

One of the standout features of this capacitor is its impressive range of specifications. It operates at both 370V and 440V, which are the most common voltage ratings for HVAC applications. The ±5% capacitance range ensures that I get a reliable performance without any unexpected fluctuations. Moreover, it supports frequencies of 50-60Hz, which is perfect for my needs, as most HVAC systems operate within this range. The temperature operating range is another highlight; with the ability to function in extreme conditions from -40°C to 70°C (-104°F to +158°F), I know I can rely on this capacitor no matter the weather.

Installation couldn’t be easier either! The SUREPHON capacitor features three clearly marked terminals—”Herm” for the compressor, “Fan” for the fan motor, and “C” for the common line. This thoughtful design means that I don’t need to worry about any complicated wiring or adapter changes, which can often be a source of frustration. If I ever need to replace my capacitor, I can do so with confidence, knowing that this product simplifies the process.

Quality assurance is paramount when investing in HVAC components, and the SUREPHON capacitor does not disappoint. It is built to meet the toughest U.S. standards for AC motor run capacitors and complies with EIA-456-A and IEC 60252-12001 specifications. The UL certification (E325324) is a testament to its safety and reliability, giving me added reassurance that I am making a sound investment. Furthermore, this capacitor is designed to last for 15 years or more, and it even comes with a 5-year guarantee. This level of durability is hard to find, and it makes me feel secure knowing that I won’t have to replace it frequently.

In case I have any questions or concerns, the customer service provided is commendable. With a promise to respond within 24 hours, I feel supported and valued as a customer. This aspect can often make or break a purchasing decision, and I truly appreciate that SUREPHON prioritizes customer satisfaction.

Feature	Details
Capacitance	40+5 uF
Voltage Rating	370V/440V
Operating Temperature	-40°C to 70°C / -104°F to +158°F
Frequency	50-60Hz
Dimensions	Diameter 63.5mm / Height 100mm
Durability	15 years or more
Warranty	5 years

In conclusion, if you are in the market for a reliable dual run start capacitor, I wholeheartedly recommend the SUREPHON 40+5 uF capacitor. Its robust features, ease of installation, and long-lasting performance make it a worthy addition to any HVAC system. Don’t miss out on the chance to enhance the efficiency of your air conditioning unit or heat pump—this product could very well be the solution you’ve been searching for!

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2. VEXUNGA 7.5uF 370-440VAC 50-60Hz CBB65 CBB65A Oval Run Start Capacitor 7.5 MFD 370V-440V Air Conditioner Capacitors for AC Unit Fan Motor Start or Pool Pump or Air Condenser Straight Cool

When it comes to ensuring optimal performance for your air conditioning units, pool pumps, or fan motors, the right capacitor can make all the difference. I recently came across the VEXUNGA 7.5uF 370/440VAC CBB65 CBB65A Oval Run Start Capacitor, and I must say, it’s a remarkable choice for anyone looking to replace their aging or malfunctioning capacitors. This product is designed specifically for both 370 and 440 Volt applications, making it versatile and ideal for a variety of setups. Its 7.5 MFD rating is perfect for providing the necessary boost for your unit to operate efficiently, and I believe it can significantly enhance performance.

The dimensions of the VEXUNGA capacitor are also noteworthy. With a size of 1.24 inches (31.5mm) in width, 2.03 inches (51.5mm) in length, and 2.17 inches (55mm) in height, it has a compact design that allows for easy installation in most standard setups. This is particularly important for anyone who may not have extensive experience with HVAC systems, as the straightforward installation process means you can quickly get your unit back up and running without the need for professional assistance.

One of the standout features of this capacitor is its impressive operating temperature range of -40℃ to +70℃ (-104℉ to +158℉). This means it can function effectively in a variety of climates, making it a reliable option for users in different geographical areas. Whether you live in a scorching hot region or somewhere that experiences freezing winters, this capacitor is designed to withstand the elements and continue performing at its best.

Safety is always a priority when dealing with electrical components, and the VEXUNGA capacitor does not disappoint. It is rated for a fault current of 10,000 AFC, which provides peace of mind when it comes to potential electrical failures. Additionally, this capacitor complies with stringent U.S. standards, including EIA-456-A and IEC 60252-12001. Being UL & CUL listed means that it has undergone rigorous testing to ensure it meets the highest safety and quality benchmarks, which is something I really appreciate as a consumer.

What’s more, if you’re looking for a direct replacement for specific models, this capacitor is compatible with numerous replacements, including 27L566BZ3, 27L566, 27L566S, 97F9001, Z97F9001, 97F9001BX, CPT-00120, TP-CAP-7.5/440, and TOCF7.5. This wide compatibility makes it a convenient choice, as you won’t have to worry about finding the exact match for your existing capacitor. It’s a straightforward solution that allows you to restore functionality to your air conditioning unit or pool pump without the hassle of searching for multiple options.

In summary, the VEXUNGA 7.5uF Oval Run Start Capacitor stands out as an excellent choice for anyone needing a reliable and efficient capacitor for their air conditioning systems or pool pumps. Its versatility, ease of installation, robust safety features, and compliance with stringent standards make it a smart investment for anyone looking to maintain or enhance their HVAC system’s performance. If you’re in the market for a replacement capacitor, I sincerely recommend considering this product. It’s an investment that could lead to improved efficiency and extended lifespan for your equipment.

Feature	Description
Capacitance	7.5uF ±6%
Voltage Rating	370/440 VAC
Size	1.24″ x 2.03″ x 2.17″ (31.5mm x 51.5mm x 55mm)
Operating Temperature	-40℃ to +70℃ (-104℉ to +158℉)
Fault Current Rating	10,000 AFC
Compliance	EIA-456-A, IEC 60252-12001, UL & CUL Listed
Compatibility	Compatible with multiple models (e.g., 27L566BZ3, 97F9001)

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3. 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

As I delve into the world of HVAC components, I find myself particularly impressed by the BOJACK 35+5uF Dual Run Circular Start Capacitor. With its remarkable specifications and reliable performance, this product stands out as an excellent choice for anyone involved in maintaining or repairing air conditioning units or fans. Capacitors play a crucial role in the efficiency and functionality of these systems, and choosing the right one can significantly impact the overall performance of the equipment.

The BOJACK capacitor offers a dual run capability of 35+5uF, which means it can support both the compressor motor and the fan effectively. This feature is particularly useful in air conditioning systems where both components need to work in harmony. The ±6% tolerance ensures that the capacitor operates consistently within its specifications, providing peace of mind for users who depend on reliable performance in their cooling systems.

One of the standout characteristics of the BOJACK capacitor is its impressive voltage rating of 370V/440V. This makes it suitable for a wide range of applications and enhances its versatility. Whether you’re working with standard home air conditioning units or more powerful commercial systems, this capacitor can handle the demands placed upon it. I appreciate that the capacitor is built to withstand harsh conditions, with an operating temperature range of -40℃ to +70℃ (-104℉ to +158℉), ensuring it performs well even in extreme environments.

In terms of safety, the BOJACK capacitor is rated for 10,000 AFC (Amps Fault Current), which is a critical feature for anyone concerned about electrical safety. This high safety rating means that the capacitor is designed to handle potential electrical faults without risking damage to the connected equipment or creating hazardous situations. This is a feature that I find essential when considering a component that plays such a vital role in the operation of my HVAC systems.

The design of the capacitor is user-friendly, featuring three clearly labeled terminals on the top “Herm” for the compressor motor, “Fan” for the fan, and “C” for the common line. This labeling takes the guesswork out of installation, making it easier for both seasoned technicians and DIY enthusiasts to connect the capacitor correctly. This thoughtful design detail is something that I truly value, as it simplifies the entire installation process.

In summary, I believe the BOJACK 35+5uF Dual Run Circular Start Capacitor is an outstanding choice for anyone looking to enhance the performance of their air conditioning units or fans. With its robust features, high safety ratings, and user-friendly design, this capacitor not only meets but exceeds expectations for reliability and efficiency. If you’re considering an upgrade or replacement for your HVAC systems, I strongly recommend giving the BOJACK capacitor a try. It may very well be the upgrade that keeps your systems running smoothly for years to come.

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

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4. 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 optimal performance in air conditioning systems and fans, the BOJACK 45+5 uF Dual Run Capacitor stands out as a reliable choice. This product is specifically designed for AC motor runs and fan starts, making it an essential component for anyone looking to ensure their cooling systems operate efficiently. The 45/5 MFD rating indicates that it can handle both a 45 microfarad (uF) and a 5 microfarad load, which is perfect for different applications. With an impressive operating voltage of 370V/440VAC, this capacitor is built to handle the demands of typical household and commercial AC units.

One of the key features that caught my attention is the operating temperature range of -40℃ to +70℃ (-104℉ to +158℉). This wide range ensures that the BOJACK capacitor can perform reliably in various climates, from extremely cold winters to scorching summers. This means I can trust it to function properly regardless of the environmental conditions, which is particularly reassuring for anyone living in regions with significant temperature fluctuations.

The safety rating of 10,000 AFC (Amperes Fault Current) is another impressive feature. This indicates that the capacitor can withstand significant electrical surges, providing peace of mind that it won’t fail under stress. In my experience, electrical components can be vulnerable to surges, and having a capacitor that can handle such events not only extends the lifespan of the device but also protects the entire system from potential damage.

The design of the capacitor is practical and user-friendly. With three clearly labeled terminals on top—”Herm”/”H” for the compressor motor, “Fan”/”F” for the fan, and “C” for the common line—installation becomes a hassle-free experience. I appreciate how these labels simplify the wiring process, making it easier for both seasoned technicians and DIY enthusiasts to replace or install the capacitor with confidence.

Moreover, the BOJACK 45+5 uF capacitor serves as a direct replacement for various models, including 97F9895, Z97F995, and many others. This compatibility is a huge plus for anyone looking to replace an existing capacitor without having to worry about finding a specific model. The versatility of being able to replace several types makes this product a practical investment.

In conclusion, I genuinely believe that the BOJACK 45+5 uF Dual Run Capacitor is an exceptional choice for anyone needing a reliable, high-quality capacitor for their air conditioning units or fans. Its robust features, including a wide operating temperature range, high safety rating, and user-friendly design, make it a standout product in its category. If you’re looking to ensure your cooling systems run smoothly and efficiently, I would strongly recommend considering the BOJACK capacitor. Investing in this product could save you time and money in the long run by preventing potential failures and ensuring your systems operate at their best.

Feature	Specification
Capacitance	45+5 uF ±6%
Voltage Rating	370V/440VAC
Dimensions	Diameter 65 mm (2.56 inch), Height 95 mm (3.74 inch)
Operating Temperature	-40℃ to +70℃ (-104℉ to +158℉)
Safety Rating	10,000 AFC
Terminal Labels	Herm/H, Fan/F, C
Replacement for	97F9895, Z97F995, 97F9895BZ3, and others

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Why a Capacitor for My Lennox AC Unit is Essential

As a homeowner, I’ve learned that maintaining my Lennox AC unit is crucial for keeping my home comfortable, especially during those sweltering summer months. One component that I’ve come to appreciate is the capacitor. This small but mighty part plays a vital role in the overall performance of my air conditioning system.

When my AC unit started to struggle with starting up, I discovered that the capacitor was likely the culprit. It helps provide the necessary boost of electricity to the compressor and the fan motor, ensuring they start smoothly. I realized that without a functioning capacitor, my AC unit could experience delays in operation or, even worse, fail to start at all. Replacing a faulty capacitor not only restored my unit’s efficiency but also saved me from potential costly repairs down the line.

Additionally, I found that having a reliable capacitor contributes to the longevity of my AC unit. By ensuring that the motors start and run smoothly, it minimizes wear and tear on other components. This proactive approach has given me peace of mind, knowing that I’m doing my part to extend the lifespan of my Lennox AC unit while keeping my home cool and comfortable. Investing in a quality capacitor has proven to be a

Buying Guide: Capacitor for Lennox AC Unit

Understanding Capacitors

I’ve learned that capacitors play a crucial role in the functioning of my Lennox AC unit. They store and release electrical energy, helping to start the compressor and fan motors. Without a properly functioning capacitor, my AC unit could struggle to operate efficiently.

Signs of a Failing Capacitor

I’ve noticed a few signs that indicate my capacitor might be failing. These include my AC unit not starting, strange humming noises, or the compressor shutting off unexpectedly. If I experience any of these symptoms, it’s essential to check the capacitor.

Types of Capacitors

When I decided to replace my capacitor, I found that there are different types to consider. The most common types for AC units are start capacitors and run capacitors. Start capacitors provide a boost of energy for the initial start-up, while run capacitors help maintain the energy during operation.

Identifying the Right Capacitor

I realized that it’s essential to identify the right capacitor for my Lennox AC unit. This involves checking the voltage rating and capacitance value, which I found printed on the old capacitor. Ensuring that I match these specifications is crucial for compatibility.

Where to Purchase

I discovered that there are various places to buy capacitors. I could find them at local HVAC supply stores, online retailers, or directly from Lennox authorized dealers. Each option has its pros and cons, but I prefer to compare prices and availability before making a decision.

Installation Considerations

When I was ready to install the new capacitor, I took safety seriously. I made sure to turn off the power to my AC unit and discharge the old capacitor to prevent any electrical shocks. If I didn’t feel comfortable doing it myself, I considered hiring a professional technician for installation.

Maintenance Tips

To prolong the life of my new capacitor, I learned a few maintenance tips. Regularly checking my AC unit for any signs of wear and tear, keeping the outdoor unit clean, and scheduling annual maintenance checks can help catch issues early and ensure optimal performance.

Conclusion

In my experience, understanding the role of the capacitor in my Lennox AC unit has been invaluable. By knowing the signs of a failing capacitor, identifying the correct type, and following proper installation procedures, I can ensure my AC unit runs smoothly. With a little research and care, I can maintain a comfortable environment at home.

Author Profile

Chris Vickery

Hello! I’m Chris Vickery, and I've had the pleasure of working closely with Lone Star Grillz, a Texas-based company led by Chris Goodlander. Serving as the President since its incorporation in 2016, Chris Goodlander has grown the business into a leader in grill fabrication and outdoor equipment. My role at Lone Star Grillz has allowed me to engage with various aspects of the business, contributing to its dynamic growth and diversification in the outdoor equipment industry.

In 2025, I embarked on a new journey as a blogger, focusing on personal product analysis and first-hand usage reviews. This transition was driven by my desire to share my expertise and insights gained from years in the industry. My blog covers a wide range of topics, from detailed reviews of the latest outdoor grills and equipment to practical advice on maintaining and maximizing the use of these products.

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