Finding the best hard start capacitor for your RV AC can be challenging. It’s crucial for optimal performance and efficiency.
A hard start capacitor helps your RV air conditioner start smoothly, especially during hot weather. Without it, the AC may struggle to start, leading to potential damage and higher energy consumption. Several options are available, including the 8333A9021 Hard Start Kit by various brands like AMI PARTS and PANDEELS.
These kits are designed to fit Coleman air conditioners and improve starting torque. SUPCO SPP6 is another reliable choice, known for its 500% increase in starting torque. Each product ensures your RV AC operates efficiently and reliably. In this post, we will review the best hard start capacitors for your RV AC to help you make an informed decision.
8333a9021 Hard Start Kit For Air Conditioner

The 8333A9021 Hard Start Kit for Air Conditioner by Howaoo is a reliable and efficient start device package designed for Coleman AC units. This replacement kit is compatible with models PKG 8335-9021 and 9333-9021. The kit is manufactured by Howaoo and boasts compact dimensions, making it an ideal solution for enhancing the performance of your air conditioning system.
Pros:
- Enhances the performance of Coleman AC units.
- Compact dimensions: Height: 3.35 inches, Width: 0.35 inches, Length: 0.35 inches.
- Easy to install and use.
- Compatible with multiple models.
Cons:
- Only compatible with specific Coleman AC models.
- Requires some technical knowledge for installation.
The 8333A9021 Hard Start Kit is an excellent addition to any Coleman air conditioner. This kit is designed to help your AC unit start more efficiently, reducing the strain on the system and potentially extending its lifespan. The compact size of the kit makes it easy to fit into tight spaces, and its compatibility with multiple models adds to its versatility.
However, it is important to note that this kit is only compatible with specific Coleman AC models, which may limit its use for some consumers. Additionally, while the installation process is straightforward, it does require a certain level of technical knowledge, which might be a challenge for those who are not familiar with AC systems. Overall, the 8333A9021 Hard Start Kit is a valuable investment for anyone looking to enhance the performance and longevity of their Coleman air conditioner.
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8333a9021 Air Conditioner Hard Start Kit Fit For Coleman

The 8333A9021 Air Conditioner Hard Start Kit is an essential component designed to enhance the performance of your Coleman air conditioning unit. This Hard Start Capacitor kit is a perfect fit for PKG 8335-9021/9333-9021/105620-10-70 models, ensuring your AC unit starts smoothly and operates efficiently. With its compact dimensions and reliable performance, this kit is a valuable addition to your AC system.
Pros:
- Improves AC startup efficiency
- Compatible with multiple Coleman models
- Compact size fits easily within the AC unit
- Durable construction ensures long-lasting performance
Cons:
- Installation may require professional assistance
- Higher initial cost compared to standard capacitors
- Limited compatibility with non-Coleman models
The 8333A9021 Air Conditioner Hard Start Kit by MIFLUS offers significant benefits for your Coleman AC unit. The improved startup efficiency means your air conditioner will require less power to start, which can extend the life of the compressor and reduce energy consumption. This kit’s durable construction ensures it will withstand the rigors of regular use, providing you with reliable performance over time.
Despite its benefits, there are a few considerations to keep in mind. The installation process may be complex for those unfamiliar with AC systems, potentially necessitating professional assistance. Additionally, the initial cost is higher compared to standard capacitors, but the investment is often justified by the long-term performance improvements. Lastly, its compatibility is limited to specific Coleman models, so it’s important to verify that it fits your unit before purchasing.
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8333a9021 Air Conditioner Hard Start Kit By Ami Parts

The 8333A9021 Air Conditioner Hard Start Kit by AMI PARTS is a reliable solution designed to fit Coleman Hard Start Capacitor kits 8333a9021, PKG 8335-9021, and 9333-9021 105620-10-70 replacement AC hard start kits. This kit is essential for enhancing the performance of your air conditioning system, ensuring a smoother and more efficient startup process.
Pros:
- Enhances the performance of your air conditioning system
- Reduces wear and tear on the compressor
- Easy to install with clear instructions
- Compatible with multiple Coleman models
Cons:
- May require professional assistance for installation
- Higher upfront cost compared to other kits
The 8333A9021 Air Conditioner Hard Start Kit by AMI PARTS offers a significant improvement in the efficiency and longevity of your air conditioning system. By reducing the initial strain on the compressor, this kit helps in maintaining the overall health of the AC unit. The easy installation process and clear instructions make it accessible even for those with minimal technical knowledge.
Although the kit may require professional assistance for installation to ensure optimal performance, its benefits far outweigh the initial investment. The reduced wear and tear on the compressor not only extends the lifespan of the AC unit but also contributes to lower maintenance costs over time. Overall, this hard start kit is a valuable addition for anyone looking to enhance the efficiency and reliability of their air conditioning system.
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Supco Spp6 Relay/capacitor Hard Start Kit

The SUPCO SPP6 Relay/Capacitor Hard Start Kit is a powerful and efficient solution designed to provide a 500% increase in starting torque. This kit is ideal for air conditioning units and refrigeration systems, enhancing their performance and longevity. Manufactured by SUPCO, a reputable brand under Sealed Unit Parts Co., Inc., the SPP6 is both reliable and robust.
Pros:
- 500% increase in starting torque
- Enhances performance of air conditioning and refrigeration systems
- Compact dimensions: Height: 6.5 inches, Width: 7.25 inches, Length: 6.5 inches
- Lightweight at just 0.3 pounds
Cons:
- May require professional installation
- Not compatible with all types of units
The SUPCO SPP6 Relay/Capacitor Hard Start Kit is an excellent addition to any HVAC system, providing a significant boost in starting torque by 500%. This feature ensures that your air conditioning and refrigeration units start up more efficiently, reducing wear and tear on the system. Additionally, its compact and lightweight design makes it easy to fit into existing setups without requiring substantial modifications.
However, it is important to note that the SUPCO SPP6 may not be compatible with all unit types, and professional installation is often recommended to ensure optimal performance and safety. Despite these minor drawbacks, the overall benefits of enhanced performance and efficiency make this hard start kit a valuable investment for maintaining and improving your HVAC systems.
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8333a9021 Air Conditioner Hard Start Kit Fit For Coleman Air Conditioner

The 8333A9021 Air Conditioner Hard Start Kit is designed to fit Coleman Air Conditioners and replace several part numbers including 8333A9021, PKG 8335-9021, 9333-9021, and 105620-10-70. This RV AC Hard Start Capacitor Kit from Edovaf helps in improving the starting performance of your air conditioning unit, ensuring a smooth and reliable operation.
Pros:
- Improves starting performance of the air conditioner
- Compatible with multiple Coleman part numbers
- Manufactured by a reliable brand, Edovaf
Cons:
- Might require professional installation
- Limited compatibility with other air conditioner brands
The 8333A9021 Air Conditioner Hard Start Kit is a valuable addition for RV owners who use Coleman air conditioners. By enhancing the starting performance, this kit ensures that your air conditioner runs smoothly and efficiently. The compatibility with multiple part numbers makes it a versatile choice for various Coleman models.
However, it’s important to note that the installation might require professional assistance, which could be an added cost. Additionally, if you have an air conditioner from a brand other than Coleman, this kit may not be suitable for your unit. Overall, this hard start capacitor kit is a reliable option for those looking to improve their air conditioner’s performance.
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8333a9021 Capacitor Hard Start Kit By Pandeels

The 8333A9021 Capacitor Hard Start Kit by PANDEELS is designed specifically to enhance the performance of Coleman Air Conditioners. This RV air conditioner AC hard start capacitor kit is a reliable solution for ensuring your air conditioning unit starts smoothly and operates efficiently.
Pros:
- Easy to install
- Increases the lifespan of your air conditioner
- Improves the efficiency of your AC unit
- Reduces the start-up time of the air conditioner
Cons:
- Only compatible with specific Coleman air conditioner models
- May require professional installation for some users
The 8333A9021 Capacitor Hard Start Kit by PANDEELS is an excellent addition to your RV air conditioning system. It is designed to make the start-up of your air conditioner more efficient, reducing the initial load on the compressor and thereby prolonging the life of your unit. This can be particularly beneficial for older air conditioners that may struggle to start up quickly.
While there are numerous advantages to using this hard start capacitor kit, it is important to note that it is specifically designed for use with Coleman air conditioners. As such, compatibility should be verified before purchase. Additionally, while the installation process is generally straightforward, some users may prefer to seek professional assistance to ensure proper setup and functionality. Overall, this kit is a valuable investment for maintaining and improving the performance of your RV’s air conditioning system.
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Air Conditioner Hard Start Kit 8333a9021

The Air Conditioner Hard Start Kit 8333A9021 by Fettechmate is designed to help your RV air conditioner start smoothly and efficiently. This kit includes a start capacitor and start relay, which work together to reduce the strain on your AC’s compressor during startup, ultimately extending the lifespan of your unit.
Pros:
- Improves AC startup performance
- Reduces strain on the compressor
- Easy to install
- Enhances the lifespan of the air conditioner
Cons:
- May not be compatible with all AC models
- Requires some technical knowledge for installation
The Air Conditioner Hard Start Kit 8333A9021 from Fettechmate is an excellent addition to your RV air conditioning system. By using this kit, you can ensure that your AC starts more smoothly, which is particularly beneficial in hot weather when your unit may be under more strain. The included start capacitor and start relay work together to provide a boost to the compressor, reducing the amount of electricity needed for startup and thereby protecting the compressor from potential damage.
Another notable feature of this hard start kit is its ease of installation. While some technical knowledge is required, the process is relatively straightforward, making it a viable option for DIY enthusiasts. However, it is important to check compatibility with your specific AC model before purchasing, as this kit may not be suitable for all units. Overall, the Fettechmate Air Conditioner Hard Start Kit is a worthy investment for those looking to enhance the performance and longevity of their RV air conditioner.
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Frequently Asked Questions
What Is A Hard Start Capacitor For Rv Ac?
A hard start capacitor helps your RV AC start smoothly. It provides an extra boost of power, reducing strain on the compressor.
How Does A Hard Start Kit Benefit Rv Air Conditioners?
A hard start kit increases the starting torque of your AC unit. This leads to quicker and more efficient starts, reducing wear and tear.
Can I Install A Hard Start Kit Myself?
Yes, you can install a hard start kit yourself. However, it’s recommended to follow the manufacturer’s instructions carefully or consult a professional.
Which Rv Ac Models Are Compatible With The 8333a9021 Kit?
The 8333A9021 kit fits Coleman AC models including PKG 8335-9021, 9333-9021, and 105620-10-70.
What Are The Signs I Need A Hard Start Capacitor?
Signs include your RV AC struggling to start, frequent tripping of circuit breakers, and unusual noises during startup.
How Long Does A Hard Start Capacitor Last?
A hard start capacitor generally lasts between 5 to 10 years. Longevity depends on usage and environmental conditions.
Conclusion
Choosing the best hard start capacitor for your rv ac can improve its efficiency and lifespan. We’ve reviewed several reliable options. Each product, like the 8333a9021 hard start kit, provides solid performance. These kits fit well with coleman air conditioners and offer easy installation.
The supco spp6 relay/capacitor hard start kit stands out for its increased starting torque. Consider your specific needs and compatibility when making a choice. A good hard start capacitor ensures your ac starts smoothly and runs efficiently. Investing in the right one can save you from costly repairs.
It also improves your comfort during travels. Remember, a well-maintained ac enhances your rv experience. Make a wise choice from these recommended options to keep your ac running smoothly. Happy traveling and enjoy the cool comfort in your rv!