Ever experienced your RV’s lights dimming when the air conditioner kicks on? Or perhaps your generator struggles to get your AC compressor going? You’re not alone! These are classic signs that your RV air conditioner could benefit from a hard start kit for RV air conditioner. These clever little devices are a game-changer for many RVers, helping your AC compressor start up more efficiently, especially when shore power is limited or you’re relying on a smaller generator.
In this article, we’ll dive into why a hard start kit is a smart investment for your RV’s cooling system, how it works, and review seven top-notch options available on the market. We’ll help you find the perfect hard start kit for RV air conditioner to ensure your travels are always cool and comfortable, no matter where the road takes you.
Why Your RV Air Conditioner Needs a Hard Start Kit
RV air conditioners, especially older models or larger BTU units, can draw a significant amount of power, often called LRA (Locked Rotor Amperage), during startup. This initial power surge can cause several headaches:
- Tripped Breakers: Your RV’s shore power connection or a small generator might not handle the sudden demand, leading to tripped breakers.
- Dimming Lights: The voltage drop during startup can cause lights and other appliances to flicker or dim.
- Generator Struggles: Smaller generators (like a 2000W or 2200W inverter generator) often can’t handle the high starting current, preventing your AC from ever getting started.
- Reduced AC Lifespan: The stress of hard starts can shorten the life of your compressor.
A hard start kit (also known as a start capacitor kit or compressor hard start booster) essentially gives your compressor an extra “kick” of power during its initial milliseconds of operation. This boosts its starting torque, allowing it to overcome inertia and start spinning much faster and more efficiently, thus reducing the initial power draw and making your AC much easier to start. It’s a fantastic upgrade for anyone looking to improve their RV air conditioner’s efficiency and reliability.
Our Top 7 Hard Start Kits for RV Air Conditioners
Let’s take a closer look at some of the best options to get your RV AC running smoothly.
1. 8333A9021 Air Conditioner Hard Start Kit by AMI PARTS
This hard start kit from AMI PARTS is a comprehensive solution designed to tackle those annoying low voltage issues and frequent AC cycling. It’s a perfect combination of components aimed at accelerating your AC’s starting speed and stabilizing its temperature changes, ensuring your RV stays cool without interruption. Many RV owners find this kit to be a lifesaver for older or struggling Coleman Mach units.
Key Features:
– Includes (1) start capacitor, (1) PTCR start device, (1) installation bracket, (1) connecting wires
– Fits all 8000 series 13500 BTU and 11,000 BTU air conditioners
– Extends AC lifespan by solving frequent starting/shutting down due to low voltage
– Accelerates AC starting speed and stabilizes temperature changes
– Compatible with numerous Coleman Mach AC model and series numbers (e.g., 48203-866 MACH 3, 6633 SERIES PARK MODEL, etc.)
Pros:
– Complete kit with all necessary components for installation
– Specifically designed for Coleman Mach RV ACs, ensuring good compatibility
– Helps prevent voltage sags and extends compressor life
– Addresses common AC problems like indirect working or frequent cycling
Cons:
– Compatibility is specific to Coleman Mach 8000 series and listed models
– Installation requires disconnecting power, which might deter beginners
User Impressions: Customers frequently praise this kit for its ability to revive older Coleman Mach units that were struggling to start. Many report a noticeable improvement in startup efficiency and a reduction in power draw, allowing their ACs to run reliably even on less stable power sources. It’s often described as a cost-effective alternative to a full AC replacement.
2. SPP6 Hard Start Capacitor Replacement 115V Thru 288VAC Hard
The SPP6 Compressor Hard Start Booster Capacitor is a popular choice for its broad applicability and impressive performance. It’s designed to give your compressor an incredible 500% boost in starting torque, effectively saving stuck or hesitant compressors. What’s more, its solid-state relay and straightforward wiring across your run capacitor make it a surprisingly simple fix that can save you a hefty service fee.
Key Features:
– Replaces various part numbers including SPP6, TJ90HS6, AP4502872, DST-6, etc.
– Increases compressor’s starting torque by 500%
– Solid-state relay design for no loose parts or complicated wiring
– Works with 115V through 288VAC systems
– Made from high-quality, manufacturer-tested materials
– Comes with a professional feedback team for after-sales support
Pros:
– Highly effective at boosting compressor startup power
– Universal design fits many different AC systems
– Simple “wire it across your run capacitor” installation
– Cost-effective solution for compressor issues
Cons:
– May not come with all installation hardware (like brackets) that specific kits offer
– Requires careful handling as it deals with capacitors and electrical components
User Impressions: Users love the SPP6 for its universal appeal and ease of installation. Many have successfully used it to fix refrigerators, freezers, and a variety of AC units, praising its immediate impact on startup performance. The claim of saving a stuck compressor often rings true for satisfied customers, making it a go-to for DIY repairs.
3. 8333A9021 Air Conditioner Capacitor Replacement for Cole-man Ma-ch RV
This 8333A9021 hard start kit for RV air conditioner is specifically tailored for Coleman Mach RV air conditioners, offering a comprehensive solution to common cooling problems. If you’re experiencing hot air, humming noises, or sudden shutdowns, this kit aims to restore your RV’s cooling system to smooth, efficient operation. It’s built for reliability, ensuring your AC operates effectively under various conditions.
Key Features:
– Complete kit includes (1) start capacitor, (1) PTCR start device, (1) installation bracket, (1) connecting wires
– Ideal for improving startup reliability and efficiency in RVs
– Helps solve hot air, humming noises, and sudden shutdowns caused by capacitor malfunction
– Fit for various Coleman Mach models and series (e.g., 46413, 8333 SERIES, etc.)
– Rated 88-108 MFD for strong starting power
– Emphasizes professional support and dedication from the brand Fetechmate
Pros:
– Designed explicitly for Coleman Mach RV ACs, ensuring compatibility
– Comprehensive kit with all necessary parts
– Addresses multiple common AC issues related to starting and operation
– Focus on quality and customer support from the manufacturer
Cons:
– Specific to Coleman Mach units, so not universally compatible
– Requires electrical work; safety precautions (power disconnection, capacitor discharge) are crucial
User Impressions: Reviewers appreciate that this kit provides everything needed for the repair, especially for their Coleman Mach units. They often highlight the significant improvement in their AC’s starting behavior, noting quieter operation and consistent cooling after installation. The strong focus on compatibility and problem-solving resonates well with RVers.
4. FRIOCASA SPP6 Hard Start Kit for Air Conditioner
The FRIOCASA SPP6 hard start capacitor is a versatile and robust solution for various air conditioning compressors, extending its utility beyond just RVs. It’s designed to provide that critical power boost to motors, preventing low voltage starting problems and adding new life to heavy-duty appliances. Its ease of installation, requiring only two wires connected across your run capacitor, makes it a convenient choice for DIY enthusiasts.
Key Features:
– SPP6 hard start capacitor, suitable for 115 to 288 VAC systems
– Increases compressor’s starting torque by 500%
– Multiple compatibility: suitable for 4000 BTU to 120000 BTU AC units, refrigeration compressors, heat pumps, etc.
– Easy and convenient two-wire installation across the run capacitor
– Made from high-quality, manufacturer-tested materials for durability
– Helps with “hard start” issues where AC struggles to connect or shuts off quickly
Pros:
– Extremely broad compatibility with various AC and motor sizes
– Simple two-wire installation process
– Significantly boosts starting torque, enhancing motor longevity
– Durable construction promises long-lasting performance
Cons:
– May not include specific mounting hardware
– General-purpose nature means it isn’t specifically optimized for RV ACs like some other kits
User Impressions: Customers often praise the FRIOCASA SPP6 for its widespread compatibility, successfully using it in everything from window AC units to larger commercial compressors. The “set it and forget it” simplicity of installation is a major plus, and many report immediate improvements in their appliance’s startup behavior, making it a reliable problem-solver.
5. SPP6 Relay/Capacitor Hard Start Kit with 500% Increase
This SPP6 hard start kit stands out for its premium quality and user-friendly installation, making it an excellent choice for anyone looking to improve their AC’s starting performance. With its ability to boost starting torque by 500%, it ensures reliable operation for a wide range of AC compressors, from small window units to large commercial systems. The design integrates a motor start capacitor and PTC thermistor, simplifying wiring and saving you time and potential maintenance costs.
Key Features:
– Model number SPP6, replaces TJ90HS6, AP4502872, and other common parts
– Compatible with various AC compressors from 4000 BTU to 120000 BTU
– Premium quality, durable, and well-tested materials
– Easy to install: simply connects in parallel with the run capacitor
– Features a motor start capacitor and PTC thermistor in series for simplified wiring
– Includes a 30-day return window and customer service support
Pros:
– Versatile compatibility for a wide range of AC units
– High-quality construction for long-lasting performance
– Simplified wiring and installation process
– Offers a significant boost in compressor starting power
– Manufacturer offers a satisfaction guarantee for peace of mind
Cons:
– Lacks specific RV-focused features or instructions
– While easy, installation still requires basic electrical knowledge
User Impressions: Users frequently commend this SPP6 kit for its straightforward installation and universal compatibility. Many have used it across different AC systems and appliances, consistently reporting smoother, quicker starts and an end to circuit breaker trips. The confidence-inspiring 30-day return policy is also a bonus for those hesitant about DIY electrical work.
6. AMI PARTS 8333A9021 Fits for Coleman Hard Start Capacitor Kit
Similar to its counterpart reviewed earlier, this AMI PARTS 8333A9021 hard start kit for RV air conditioner is a specialized solution for Coleman Mach RV AC units. It addresses issues like frequent starting/shutting down due to low voltage and aims to stabilize your AC’s temperature changes. This kit provides all the essential components to restore optimal performance, ensuring your AC runs reliably and efficiently, extending its overall lifespan.
Key Features:
– Perfect combination of (1) start capacitor, (1) PTCR start device, (1) installation bracket, (1) connecting wires
– Fits all 8000 series 13500 BTU and 11,000 BTU air conditioners
– Extends life span by solving frequent starting/shutting down due to extremely low voltage
– Accelerates the starting speed of AC and stabilizes temperature changes
– Compatible with an extensive list of Coleman Mach model and series numbers
– Addresses situations where your air conditioner appears to be “indirectly not working”
Pros:
– Comprehensive kit tailored for specific Coleman Mach RV ACs
– Significantly reduces stress on the compressor during startup
– Helps maintain stable cooling temperatures
– Offers a cost-effective repair rather than full AC replacement
Cons:
– Requires careful attention to compatibility with specific Coleman Mach models
– Electrical safety precautions are essential during installation
User Impressions: This kit garners positive feedback from Coleman Mach owners who struggled with power issues. They often note that the kit makes a dramatic difference, allowing their ACs to start smoothly even on limited amperage. Many appreciate that it’s a complete package, simplifying the repair process for those familiar with basic electrical tasks.
7. SoftStartRV Soft Start for RV Air Conditioner, RV AC Soft
While the term “hard start kit” is common, SoftStartRV actually offers a soft start solution, which is a significant advancement. This technology drastically reduces the initial power spike of your RV AC compressor, allowing you to run your AC on smaller generators (like a 2200W unit) or even two ACs on a 30-amp hookup. What sets it apart is its compact, waterproof design and its ability to reduce compressor noise and vibrations, providing a quieter and more efficient cooling experience.
Key Features:
– 40% smaller design to fit all Low-Profile RV A/C units
– Enables starting two ACs on 30-amp, one on a small generator, or 15-amp
– 100% waterproof construction for durability
– Reduces compressor noise and vibrations for a quieter RV experience
– Works with a 2200W generator, powering up to 36,000 BTUs (including 15,000 BTU rooftop AC)
– Offers easy guides, tutorials, live support, and free assistance from certified technicians
– Backed by a 30-day satisfaction guarantee
Pros:
– True soft start technology for minimal power draw
– Exceptional compatibility with small generators and limited shore power
– Reduces AC noise, improving comfort
– Robust, waterproof design
– Comprehensive customer support and installation assistance
– Risk-free purchase with a satisfaction guarantee
Cons:
– Generally a higher price point than traditional hard start kits
– Installation might be perceived as more involved due to advanced technology
User Impressions: SoftStartRV is a true game-changer for many RVers, especially those who boondock or rely on small generators. Users rave about the ability to run their AC without tripping breakers or needing a massive generator. The reduction in noise is a frequently highlighted benefit, contributing to a more peaceful RV environment. The excellent customer support is also a huge plus for those needing installation guidance.
FAQ: Hard Start Kits for RV Air Conditioners
Q1: What is a hard start kit for an RV air conditioner, and how does it work?
A hard start kit, or start capacitor kit, is an electrical device designed to give your RV AC compressor an extra surge of power during startup. It temporarily boosts the starting torque of the compressor motor, helping it overcome initial resistance and get up to speed much quicker. This reduces the high inrush current (LRA) that an AC typically draws, making it easier to start on limited power sources like smaller generators or 30-amp hookups.
Q2: Why would my RV air conditioner need a hard start kit?
Your RV AC might need a hard start kit if you experience issues like:
* Circuit breakers tripping when the AC starts.
* Lights dimming significantly when the AC turns on.
* Your generator struggling or failing to start the AC.
* The AC compressor making a loud hum but not starting.
* Frequent AC cycling or inconsistent cooling, especially in hot weather or low voltage conditions.
Q3: Is there a difference between a “hard start kit” and a “soft start kit”?
Yes, there’s a significant difference! A traditional hard start kit provides a quick, powerful jolt of energy at startup. A soft start kit, like the SoftStartRV, uses more advanced technology to gradually ramp up the voltage and current to the compressor. This results in a much lower and smoother power draw over a longer period, making it even easier to start your AC on very small generators or multiple ACs on limited power. Soft start kits are generally more expensive but offer superior performance in power reduction.
Q4: Can a hard start kit extend the life of my RV air conditioner?
Yes, absolutely! By reducing the high electrical and mechanical stress on the compressor during startup, a hard start kit helps to extend its lifespan. The compressor doesn’t have to work as hard to get going, leading to less wear and tear over time. This can prevent costly repairs or replacements down the road.
Q5: Is it difficult to install a hard start kit on an RV air conditioner?
For most hard start kits, installation is generally considered a DIY-friendly task for anyone with basic electrical knowledge and comfort working with wires. It typically involves connecting two or three wires to your AC’s run capacitor. However, it’s crucial to always disconnect all power to your RV AC before attempting any electrical work and allow capacitors to discharge fully. If you’re unsure, consulting a professional or using kits with dedicated support (like SoftStartRV) is recommended.
Q6: Will a hard start kit help my RV AC run on a smaller generator?
Yes, that’s one of the primary benefits! By significantly lowering the initial power surge required by the compressor, a hard start kit (especially a soft start kit) makes it much easier for smaller generators (e.g., 2000-2200W inverter generators) to handle the AC’s startup. This opens up more possibilities for boondocking and dry camping with comfortable cooling.
Q7: How do I know which hard start kit is compatible with my RV AC?
Compatibility is key. Check your AC unit’s model and series number. Many hard start kits specify which brands (e.g., Coleman Mach) and BTU ratings (e.g., 11,000 BTU, 13,500 BTU) they are designed for. Universal SPP6-style kits often work with a broader range of AC units, but it’s always best to verify the voltage requirements (e.g., 115V, 230V) and consult the product’s compatibility list or your AC manual if possible.
Conclusion
A hard start kit for RV air conditioner isn’t just a luxury; it’s a smart upgrade for any RVer looking for more reliable cooling and greater flexibility with power sources. Whether you’re battling low voltage, struggling with a smaller generator, or simply want to extend the life of your AC compressor, there’s a kit out there for you.
From specific Coleman Mach replacements to universal SPP6 boosters and advanced soft start technologies, we’ve covered some excellent options. Remember to consider your specific RV AC model, your power requirements, and your comfort level with DIY installation when making your choice. Investing in the right hard start kit can lead to cooler, quieter, and more worry-free adventures for years to come!