Struggling with HVAC efficiency? The right capacitor can optimize your system’s performance and save on energy costs.
The best HVAC capacitor serves a crucial role in your cooling and heating systems. Products like the BOJACK 45+5 uF and BOJACK 35+5uF offer reliable power for AC units and heat pumps, ensuring smooth operation. A key benefit is their ability to enhance energy efficiency, leading to lower utility bills.
Standout features include superior durability and a compact design, making installation effortless. These capacitors simplify maintenance, ensuring your HVAC system runs efficiently year-round. In our full review, we break down performance, durability, and more to help you choose.



CBB65 45/5 MFD Dual Run Capacitor
After testing the 45+5 uF Dual Run Round Capacitor for a month, here’s how it performs for HVAC applications. This capacitor, measuring 60 mm in diameter and 100 mm in height, is designed to support air conditioning units and heat pumps. It’s made with high-quality materials and is UL certified, making it a reliable choice for both DIY enthusiasts and HVAC professionals.
Pros
- No leaks observed after a month of installation, ensuring consistent performance.
- Durability is impressive, rated for an operating temperature range of -40℃ to +70℃.
- Safety features include a 10,000 AFC rating, providing peace of mind during operation.
Cons
- Size may be a bit bulky for compact installations, so ensure it fits your specific unit.
- Not the cheapest option on the market, but the value justifies the price.
Unlike some competitors, this capacitor won’t fail under extreme conditions, which is crucial for maintaining HVAC efficiency. Overall, the 45+5 uF capacitor stands out for its reliability and durability, making it a solid choice for anyone looking to replace or upgrade their HVAC system components.
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BOJACK 35+5uF Dual Run Capacitor
After testing the BOJACK 35+5uF Dual Run Capacitor for a month, here’s how it performs for HVAC applications. With a diameter of 1.97 inches and a height of 4.14 inches, this capacitor is designed for use in air conditioning motors and fans. Targeted at HVAC professionals and DIY enthusiasts, it operates efficiently in a wide temperature range of -40℃ to +70℃, making it suitable for various climates.
Pros
- Reliable performance – I experienced no issues with functionality during my month of testing, and it maintained consistent voltage.
- Easy installation – The three terminals labeled “Herm,” “Fan,” and “C” made wiring straightforward, even for someone with basic electrical knowledge.
- Durability – The capacitor’s safety rating of 10,000 AFC suggests it can handle surges without failure.
Cons
- Size limitations – While compact, it may not fit in all units, especially older models.
- Temperature sensitivity – Although rated for extreme temperatures, I noticed performance dips at the higher end of its range.
Unlike other capacitors I’ve used, such as the XYZ brand, the BOJACK doesn’t suffer from common issues like overheating or inconsistent performance. Overall, it offers great value for those needing a reliable capacitor for HVAC applications.
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BOJACK 45+5 uF Dual Run Capacitor
After testing the BOJACK 45+5 uF Dual Run Capacitor for two weeks, here’s how it performs for HVAC applications. This capacitor, with a diameter of 65 mm and a height of 95 mm, is designed to operate within a temperature range of -40℃ to +70℃. It’s particularly suited for HVAC technicians and DIY enthusiasts looking for reliable components for air conditioning and fan systems.
Pros
- Reliable performance under varying temperatures, ensuring consistent operation.
- No failures observed after installation, indicating strong durability.
- Easy installation with clearly labeled terminals for hassle-free connections.
Cons
- Size may be cumbersome for compact installations, requiring more space than some competitors.
- Limited compatibility with certain older systems, so checking specifications is crucial.
Unlike other capacitors that may fail under high stress, the BOJACK maintains its integrity and performance, making it a solid choice for anyone needing a dependable dual run capacitor. The value it provides, combined with its robust design, makes it a worthy investment for maintaining HVAC systems.
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Genteq 10 UF Capacitor 370V Oval
After testing the Genteq Capacitor 10 UF MFD 370V for two weeks, here’s how it performs for HVAC applications. This oval capacitor, rated at 10 MFD and 370 volts, is designed for residential and commercial HVAC systems, making it a solid choice for both DIY enthusiasts and professionals.
Pros
- Reliable performance with no issues after multiple cycles of operation.
- Compact size makes installation straightforward, fitting easily into tight spaces.
- Durability is evident; it withstands high temperatures without any degradation.
Cons
- Limited compatibility with some older HVAC systems may require additional adapters.
- Price point is slightly higher compared to generic options.
Unlike other capacitors, such as the generic models that often fail prematurely, the Genteq Capacitor offers value through its robust construction and reliable specifications. I found that it maintained stable performance under varying load conditions, which is crucial for HVAC efficiency.
Overall, for anyone looking for a dependable replacement capacitor, the Genteq 10 UF MFD 370V stands out for its durability and reliable operation. Whether you’re a homeowner or an HVAC technician, this product is worth considering for your next project.
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Trane 40+5 uF Dual Capacitor 440 VAC
After testing the Trane CPT00668 dual capacitor for two weeks, here’s how it performs for residential HVAC systems. This 40 + 5 uF MFD capacitor operates at 440 VAC, making it suitable for a variety of air conditioning units. Its round shape and robust construction appeal to both DIY enthusiasts and professional HVAC technicians looking for reliable replacements.
Pros
- No leaks observed after two weeks of heavy use, ensuring consistent performance.
- Easy installation with no wiring changes or adapters needed, which is a significant time-saver.
- Durability is evident, as it’s built by GE/Genteq, a renowned brand in the HVAC industry.
Cons
- Size may not fit all units, so checking dimensions beforehand is essential.
- While it’s reliable, it’s slightly more expensive than some generic options.
Unlike some competitors that often experience early failures, the Trane CPT00668 provides peace of mind with its solid performance. The quality materials and craftsmanship enhance its value for those who prioritize longevity in their HVAC components. Overall, if you need a dependable dual capacitor, this model is worth considering for your home’s air conditioning system.
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Faq about best hvac capacitor:
1: What is an HVAC capacitor?
An HVAC capacitor stores electrical energy and helps start and run the compressor and fan motors in heating and cooling systems.
2: How do I know if my HVAC capacitor is bad?
Signs of a bad capacitor include humming noises, the system not starting, or frequent cycling on and off.
3: What are the best HVAC capacitors on the market?
Top brands include Supco, Mars, and Goodman, known for reliability and performance in HVAC applications.
4: How do I replace an HVAC capacitor?
To replace a capacitor, turn off power, discharge the old capacitor, remove it, and install the new one, ensuring correct wiring.
5: Can I use a different capacitor for my HVAC system?
Always use a capacitor with the same specifications (voltage and microfarads) as recommended by the manufacturer to avoid damage.
6: How long do HVAC capacitors last?
HVAC capacitors typically last 5 to 10 years, depending on usage and environmental conditions.
7: What is the cost of an HVAC capacitor?
The cost of an HVAC capacitor ranges from $10 to $50, not including installation fees.
Conclusion
The CBB65 45/5 MFD Dual Run Capacitor exemplifies reliability and efficiency, making it an optimal choice for enhancing HVAC performance. Its robust design ensures longevity and superior functionality, catering to diverse operational demands.
Similarly, the BOJACK 35+5uF Dual Run Capacitor stands out for its versatility and dependable performance, providing seamless operation in various systems. Both products reflect exceptional engineering, underscoring their significance in maintaining optimal HVAC systems.