Understanding My Furnace Blower Motor Start Capacitor: A Personal Journey and Expert Insights

As the chill of winter sets in and the warmth of our homes becomes a cherished refuge, I often find myself pondering the intricate dance of machinery that makes it all possible. One crucial player in this symphony of warmth is the furnace blower motor start capacitor—a small yet powerful component that can make or break our heating systems. I’ve discovered that understanding this unsung hero can not only enhance our appreciation for home heating but also empower us to troubleshoot common issues that may arise. In this exploration, I invite you to join me in unraveling the mysteries of the furnace blower motor start capacitor, a topic that intertwines engineering ingenuity with our everyday comfort. Together, we’ll delve into its vital role, how it operates, and why it deserves a place at the forefront of our home maintenance discussions.

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1. BOJACK 7.5 uF ±6% 7.5 MFD 370V/440V CBB65 Oval Run Start Capacitor for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditione

When it comes to maintaining the optimal performance of my air conditioning system or cooling units, I understand the importance of having reliable components. That’s why I was excited to discover the BOJACK 7.5 uF ±6% 7.5 MFD 370V/440V CBB65 Oval Run Start Capacitor. This product is a game-changer for anyone looking to ensure their AC motor runs smoothly, whether for cooling or heating purposes. I can confidently say that this capacitor meets and exceeds the requirements for efficiency and safety.

First and foremost, the specifications of the BOJACK capacitor stand out. With a capacitance of 7.5 uF and a voltage rating of 370V/440V, it is designed to handle the demands of modern air conditioning systems. The operating temperature range of -40 ℃ to +70 ℃ (-104℉ to +158℉) is a significant advantage, as it ensures that the capacitor will perform reliably in various environmental conditions. This is particularly important for those who live in extreme climates, where temperature fluctuations can be a challenge for electronic components.

Safety is always a top priority, and the BOJACK capacitor is engineered with this in mind. The inclusion of a UL recognition and a 10,000 AFC (Amps Fault Current) anti-explosion pressure switch is a reassuring feature. It gives me peace of mind knowing that the capacitor is designed to prevent potential hazards, making it a trustworthy option for my home or office air conditioning systems. Whether I’m running a compressor or a fan motor, I can rely on this capacitor to keep everything in check.

Moreover, the BOJACK capacitor is a direct replacement for several existing models, including 27L566BZ3, 27L566, 27L566S, 97F9001, Z97F9001, 97F9001BX, CPT-00120, and TP-CAP-7.5/440. This compatibility makes it incredibly convenient for those of us who might be looking to replace an old or faulty capacitor without the hassle of searching for specific parts. The ease of installation is a definite plus, saving me time and effort.

To summarize the key features of the BOJACK capacitor, I’ve created the following table for a clearer overview

Feature	Description
Capacitance	7.5 uF ±6%
Voltage Rating	370V/440V
Operating Temperature Range	-40 ℃ to +70 ℃ (-104℉ to +158℉)
Safety Features	UL Recognized, 10,000 AFC Anti Explosion Pressure Switch
Compatibility	Replacement for multiple models (e.g., 27L566BZ3, 97F9001)

if you’re in the market for a dependable run start capacitor for your air conditioning system, I highly recommend the BOJACK 7.5 uF capacitor. Its robust features, safety ratings, and compatibility with several models make it a standout choice. Investing in this capacitor not only ensures that your cooling and heating systems operate efficiently, but it also provides the safety and reliability that I, and I’m sure you, value in any appliance. Don’t hesitate; consider upgrading your system with this exceptional product! It may just be the solution you’ve been searching for.

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2. HQRP 10uf 370-440V Capacitor Compatible with AC Electric Motor Run Start HVAC Blower Compressor Trane Furnace 10MFD 27L669 97F9002 Jandy Carrier Payne UL Listed

As I delve into the details of the HQRP 10uf 370-440V Capacitor, I am genuinely impressed by what this product offers. Designed specifically for compatibility with AC electric motors, HVAC systems, and various compressors, this capacitor serves as an essential component for anyone looking to maintain or repair their heating, ventilation, and air conditioning systems. The versatility of this capacitor makes it a valuable investment for homeowners and professionals alike, ensuring that their equipment runs smoothly and efficiently.

One of the standout features of the HQRP capacitor is its UL listing. This certification is a testament to the product’s safety and reliability. When I see that a product meets stringent safety standards, it gives me confidence in its performance and longevity. The capacitor’s capacitance rating of 10uf (microfarads) and its ability to operate under a voltage range of 370-440V makes it suitable for a wide array of applications, particularly in HVAC systems where consistent performance is crucial. The +/-5% tolerance ensures that it provides stable and reliable performance, which is something I always look for in electrical components.

Another noteworthy aspect is the capacitor’s compliance with RoHS (Restriction of Hazardous Substances) regulations. This means that the product is manufactured without harmful materials, making it a safer choice for both the environment and for users like me. It is reassuring to know that I’m not only making a smart choice for my equipment but also contributing positively to environmental sustainability.

The dimensions of the capacitor, measuring 51.5mm x 31.5mm x 65mm, make it compact enough to fit seamlessly into most systems without requiring extensive modifications. Whether I’m looking to replace an old capacitor or install a new one, the HQRP capacitor has a shape that is convenient for a variety of installations. The 200-day warranty is another feather in its cap, providing peace of mind that if I encounter any issues, I have a safety net to rely upon.

For those of us who may be concerned about compatibility, the HQRP capacitor does not disappoint. It is compatible with a range of part numbers, including but not limited to 97F9002, 27L669, and HC91CA010. This wide compatibility means that I can use it in various systems without worrying whether it will fit or function correctly. It’s a versatile option that can suit multiple needs, making it a smart purchase for anyone in the HVAC or electrical fields.

Moreover, the HQRP CBB65 Motor Run Capacitors are known for their outstanding electrical characteristics, including high capacitance stability over time and temperature, along with very low internal power losses. This means that once I install it, I can expect reliable performance without frequent interruptions or failures, which ultimately saves me time and money in the long run.

the HQRP 10uf 370-440V Capacitor stands out as a high-quality, reliable component for anyone involved in HVAC maintenance or repair. With its UL listing, RoHS compliance, wide compatibility, and excellent electrical characteristics, I feel confident recommending this product. If you are looking to enhance the performance of your HVAC systems or simply replace an aging capacitor, this is a purchase that I believe will serve you well. Don’t hesitate to make this investment; your equipment—and your peace of mind—will thank you for it.

Feature	Details
Capacitance	10uf
Rated Voltage	AC 370-440V
Tolerance	+/- 5%
Shape	Oval
Dimensions (LxWxH)	51.5mm x 31.5mm x 65mm
Warranty	200 Days
Compatibility	Multiple part numbers including 97F9002, 27L669
Compliance	UL Listed, RoHS Compliant

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3. BOJACK 5 uF ±6% 5 MFD 370V/440V CBB65 Oval Run Start Capacitor for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditione

When I first came across the BOJACK 5 uF ±6% 5 MFD 370V/440V CBB65 Oval Run Start Capacitor, I was genuinely impressed by its design and functionality. This product caters specifically to individuals who rely on air conditioning systems or heat pumps for comfort in their homes or businesses. Whether you’re a homeowner wanting to maintain a comfortable environment or a technician tasked with servicing HVAC systems, this capacitor is an excellent choice to ensure reliable performance.

One of the standout features of the BOJACK capacitor is its impressive operating temperature range of -40 ℃ to +70 ℃ (-104℉ to +158℉). This means that it can function effectively in both extremely cold and hot conditions, making it an ideal option for various climates. I can see how this would be a significant advantage for users in areas with fluctuating temperatures. Knowing that this capacitor can withstand such extremes gives me confidence in its durability and longevity.

The BOJACK capacitor is specifically engineered to run compressor and fan motors, which is crucial for the efficient operation of air conditioning systems. Its UL recognition further assures users of its safety and quality. As someone who values safety in electrical components, I find it reassuring that this capacitor is designed with a 10,000 AFC anti-explosion pressure switch. This feature is not only about safety; it also ensures that the capacitor can handle sudden power surges without failing, which is essential for protecting the overall HVAC system.

Additionally, the BOJACK capacitor serves as a replacement for a variety of models, including CPT00072, 97F95702, 97F5705, and others. This versatility makes it a practical choice for both DIY enthusiasts and professional technicians. If you’re someone who often finds themselves needing to replace capacitors, having a reliable and compatible option like this can save you time and effort. It’s always nice to have a product that fits multiple applications, ensuring you’re not stuck searching for the right fit when you need it most.

Overall, I believe the BOJACK 5 uF capacitor is an outstanding investment for anyone in need of a dependable component for their air conditioning system or heat pump. Its combination of safety features, broad operating temperature range, and compatibility with various models make it a standout choice. If you’re looking to enhance the efficiency of your HVAC system or ensure that your air conditioning runs smoothly during peak seasons, I highly recommend considering the BOJACK capacitor. It’s not just a purchase; it’s an investment in comfort and reliability for your home or business.

Feature	Description
Voltage Rating	370V/440V
Capacitance	5 uF ±6%
Operating Temperature Range	-40 ℃ to +70 ℃ (-104℉ to +158℉)
Safety Feature	10,000 AFC Anti-Explosion Pressure Switch
UL Recognition	Yes
Replacement Models	CPT00072, 97F95702, 97F5705, Z97F5702, Z97F5705, C305L, TOCF5, TP-CAP-5/440, TT-CAP-5/440

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4. 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 I first came across the VEXUNGA 7.5uF 370/440VAC CBB65 CBB65A Oval Run Start Capacitor, I was immediately impressed by its robust specifications and versatility for various applications. This product is designed to cater specifically to the needs of both air conditioning units and pool pumps, making it a reliable choice for anyone seeking to enhance the efficiency of their cooling systems. For individuals who frequently use air conditioners or pool pumps, investing in a high-quality capacitor like the VEXUNGA is not just a necessity, but a step toward ensuring the longevity and reliability of these essential appliances.

The first standout feature of the VEXUNGA capacitor is its dual voltage compatibility—operating efficiently at both 370V and 440V. This flexibility is crucial, especially in scenarios where voltage levels can fluctuate or differ based on the specific requirements of different devices. With a capacitance rating of 7.5 MFD and a tolerance of ±6%, the capacitor promises consistent performance and reliability, which is essential for the start-up phase of motors in air conditioning units and pool pumps.

Moreover, I was particularly impressed by the compact dimensions of the capacitor, measuring 1.24 inches by 2.03 inches by 2.17 inches. This makes it easy to fit into various installations without taking up excessive space. The design is not only practical but also adheres to stringent safety standards, boasting a safety rating of 10,000 AFC—Available Fault Current. This feature gives me peace of mind knowing that it meets and exceeds tough U.S. standards, including EIA-456-A and IEC 60252-12001, and is UL & CUL listed.

Another significant aspect is the operating temperature range of -40℃ to +70℃ (-104℉ to +158℉). This wide temperature range ensures that the capacitor can function effectively in diverse environments, from chilly winters to scorching summers. For users in varying climates, this resilience is indispensable, as it guarantees that the capacitor will perform optimally, regardless of external conditions.

In terms of compatibility, the VEXUNGA capacitor is designed to replace multiple models, including 27L566BZ3, 27L566, 97F9001, and more. This feature makes it a versatile choice for anyone needing a replacement part for their existing systems. It eliminates the hassle of searching for specific components, allowing for a straightforward installation process. The ease of replacement can save users both time and money, making it an excellent investment.

To summarize, the VEXUNGA 7.5uF Run Start Capacitor is not just a component; it’s a reliable ally in maintaining the efficiency of your air conditioning and pool pump systems. With its robust specifications, wide compatibility, and adherence to safety standards, it is a product I wholeheartedly recommend. Investing in this capacitor means investing in the longevity of your appliances, and it provides a sense of security knowing that I have a dependable product at my disposal. If you are looking to enhance the performance of your AC units or pool pumps, I strongly encourage you to consider the VEXUNGA capacitor—it’s a decision you won’t regret!

Feature	Description
Capacitance	7.5uF ±6%
Voltage Ratings	370V / 440V
Dimensions	1.24inch / 31.5mm x 2.03inch / 51.5mm x 2.17inch / 55mm
Operating Temperature	-40℃ to +70℃ / -104℉ to +158℉
Safety Rating	10,000 AFC
Compliance Standards	EIA-456-A, IEC 60252-12001, UL & CUL Listed
Compatible Models	27L566BZ3, 27L566, 97F9001, etc.

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Why a Furnace Blower Motor Start Capacitor is Essential for My Heating System

As a homeowner, I’ve come to appreciate the crucial role that the furnace blower motor start capacitor plays in the efficiency and reliability of my heating system. This small but mighty component provides the initial boost of power needed to get the blower motor running, especially during those cold winter months when I need my furnace the most. Without it, my furnace might struggle to start, leading to inconsistent heating and increased wear on the motor.

When I first learned about the start capacitor, I realized that it not only helps my blower motor start smoothly but also enhances its overall performance. By ensuring that the motor receives the right amount of electrical energy at startup, the capacitor minimizes the risk of overheating and extends the life of my furnace. I’ve noticed that when the capacitor is functioning properly, my heating system operates more efficiently, resulting in lower energy bills and a more comfortable home environment.

Additionally, having a reliable start capacitor can prevent costly repairs down the line. I’ve experienced firsthand how a failing capacitor can lead to bigger issues, such as a burnt-out motor or even a complete system failure. By keeping an eye on this component and replacing it when necessary, I can save myself from the hassle

Buying Guide: Furnace Blower Motor Start Capacitor

Understanding Furnace Blower Motor Start Capacitors

When I first encountered issues with my furnace blower, I quickly learned that the start capacitor plays a crucial role. This small but essential component helps the motor start up by providing an extra jolt of electricity. Without a functioning start capacitor, my blower motor struggled to operate, leading to inefficient heating or complete system failure.

Identifying the Right Capacitor

Before making a purchase, I took the time to identify the specifications of my existing capacitor. I found the capacitance rating and voltage, which are key factors in selecting the right replacement. Capacitors are typically measured in microfarads (µF) and should match the original specifications to ensure proper performance.

Considering the Type of Capacitor

I discovered that there are two main types of start capacitors: permanent and dual run capacitors. Permanent capacitors are used only for starting, while dual run capacitors can operate both the start and run functions of the motor. I had to determine which type suited my furnace system.

Quality and Durability

During my search, I realized that not all capacitors are created equal. I paid attention to the build quality and materials. A durable capacitor can withstand higher temperatures and is less likely to fail prematurely. Investing in a quality capacitor can save me from future headaches.

Checking for Compatibility

I made sure to double-check the compatibility of the capacitor with my furnace model. Each furnace has specific requirements, and I didn’t want to risk purchasing a capacitor that wouldn’t fit or work correctly. Consulting my furnace manual was incredibly helpful in this process.

Price Range and Budgeting

While shopping, I noticed a range of prices for furnace blower motor start capacitors. I considered my budget but also recognized that a lower price might not always mean better value. I weighed the cost against the quality and specifications to find the best balance for my needs.

Warranties and Guarantees

I found that many manufacturers offer warranties or satisfaction guarantees on their capacitors. This gave me peace of mind, knowing that if I encountered any issues, I could seek a replacement or refund. A solid warranty often indicates confidence in the product’s quality.

Where to Buy

After gathering all this information, I explored various buying options. Local hardware stores, home improvement centers, and online retailers all had their advantages. I appreciated the convenience of online shopping, but I also valued the ability to consult with knowledgeable staff in person.

Installation Considerations

Finally, I contemplated the installation process. I had the option to install the capacitor myself or hire a professional. If I chose to DIY, I made sure to follow safety precautions and guidelines. Understanding the installation requirements helped me make an informed decision.

Final Thoughts

After considering all these factors, I felt ready to make an informed purchase of a furnace blower motor start capacitor. My experience taught me that taking the time to research and understand the product leads to better choices, ultimately enhancing the performance of my heating system.

Author Profile

Andrew Copher

Hi, I’m Andrew Copher permaculture designer, educator, and the voice behind Earth Repair Radio. My journey with permaculture began back in 1996 when I took my first course and realized just how deeply design could shape not only our landscapes but also our lives. Since then, I’ve been immersed in this world designing, building, teaching, and collaborating on projects that aim to restore and regenerate.

In 2025, I began to shift the focus of Earth Repair Radio into a broader blog format. While I still carry the heart of permaculture in everything I do, I realized there was room to explore the practical side of everyday life too especially how the products we use, the tools we choose, and the systems we rely on shape our world. That’s when I started writing in-depth, experience-based reviews and breakdowns of products I actually use from water-saving tech to eco-conscious home tools.

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