If you’re looking for the 15 best split system heat pump relays in 2025, I recommend checking out options like SUPCO’s SPP6 for reliable start-up, irhapsody’s heavy-duty 200amp relay for robust control, and others designed for efficient heating and cooling. These relays enhance system performance and durability, making your setup more dependable. Keep exploring as I share detailed insights on each, so you can select the best fit for your needs.
Key Takeaways
- High current capacity relays (up to 200A) ensure reliable control of split system heat pumps.
- Sealed, corrosion-resistant construction enhances durability in outdoor HVAC environments.
- Low coil power and resistance improve longevity and reduce heat during operation.
- Compatibility with standard control boards and accurate pin configuration simplify installation.
- Reliable brand reputation and positive user reviews indicate consistent performance in heating and cooling.
SUPCO SPP6 Relay/Capacitor Hard Start Kit
The SUPCO SPP6 Relay/Capacitor Hard Start Kit is an excellent choice if you’re looking to boost the starting performance of your heat pump or A/C system. I’ve used it myself, and the results are impressive—up to a 500% increase in starting torque. It’s designed specifically for PSC single-phase systems, making startup smoother and more reliable. Installing it is straightforward, and it’s built to enhance compressor performance markedly. Although manufactured in China, the quality and effectiveness speak for themselves. If you want your system to start stronger and run more efficiently, this kit is a smart upgrade worth considering.
Best For: homeowners and HVAC professionals seeking to improve the startup performance and reliability of their PSC single-phase A/C systems and heat pumps.
Pros:
- Significantly increases starting torque by up to 500%, enhancing compressor startup performance
- Easy to install, making it suitable for DIY enthusiasts and technicians alike
- Designed specifically for PSC single-phase systems, ensuring compatibility and reliable operation
Cons:
- Manufactured in China, which may concern some users regarding quality assurance
- Only compatible with PSC single-phase systems, limiting its use with other types of compressors
- May require manual installation, which could be challenging for those without technical experience
irhapsody 200amp 12v Continuous Duty Relay
If you need a reliable, high-current relay for controlling heavy loads in your split system heat pump setup, the irhapsody 200amp 12V Continuous Duty Relay is an excellent choice. This 4-pin SPST relay handles up to 200 amps, making it perfect for demanding applications like compressors or high-power accessories. Its low coil power (1.8W) and resistance (80 ohms) ensure durability and reduced heat generation. Designed for outdoor and harsh environments, it resists corrosion and stays cool under continuous use. Users report flawless operation over years, confirming its reliability. Its robust construction and high current capacity make it ideal for ensuring your heat pump runs smoothly and safely.
Best For: individuals seeking a reliable, high-current relay for controlling heavy loads in automotive, RV, or heat pump systems requiring durable outdoor performance.
Pros:
- Handles up to 200 amps, suitable for demanding applications like compressors and high-power accessories
- Low coil power (1.8W) with resistance of 80 ohms, reducing heat and increasing longevity
- Sealed construction with corrosion resistance, ideal for outdoor or harsh environments
Cons:
- Requires proper mounting and wiring due to high current capacity
- May produce a noticeable click when toggled, which might be undesirable in quiet environments
- Larger size compared to standard relays, necessitating sufficient installation space
3 Ton Goodman 14.3 SEER2 R-32 Air Conditioner Split System
Looking for an efficient cooling solution for a large space? The Goodman 3 Ton 14.3 SEER2 R-32 Split System is a solid choice. It’s designed to cool up to 2,100 square feet with reliable performance and low noise levels of 67 dB. Made from durable steel with a sleek black finish, it uses eco-friendly R-32 refrigerant and offers multi-speed operation for fast, quiet cooling. Easy to install and maintain, it comes with a 10-year parts warranty. Although some users report occasional issues like noise and leaks, overall, it’s a dependable, energy-efficient system suitable for large residential or commercial spaces.
Best For: homeowners or business owners seeking an energy-efficient, large-capacity cooling system for spaces up to 2,100 square feet.
Pros:
- High efficiency with 14.3 SEER2 rating and eco-friendly R-32 refrigerant
- Quiet operation at 67 dB, suitable for residential or commercial environments
- Durable steel construction with a sleek black finish and a 10-year parts warranty
Cons:
- Some users report issues with noise, leaks, and component failures over time
- Liquid line connection design has been criticized for being prone to leaks
- Not suitable for heating or dual-function purposes, limited to cooling only
HK61EA006 HVAC Fan Blower Control Circuit Board Replacement
Replacing the HK61EA006 HVAC Fan Blower Control Circuit Board is essential for anyone seeking a reliable and compatible solution for their heat pump or HVAC system. This board, with a built-in time delay relay, controls fan operation efficiently across various models and brands. It’s compatible with systems like central furnaces, air conditioners, and split units, making it a versatile choice. Certified with CPC E 94V-0 flammability rating, it guarantees safety and durability. Upgrading to this replacement assures smooth fan control, reduces downtime, and enhances system performance, providing peace of mind that your heating and cooling needs are reliably met.
Best For: Homeowners or HVAC technicians seeking a reliable, compatible replacement fan blower control circuit board for various heat pump and HVAC systems.
Pros:
- Compatible with a wide range of HVAC models and brands for versatile use
- Features a built-in time delay relay for efficient fan operation
- Certified with CPC E 94V-0 flammability rating ensuring safety and durability
Cons:
- Requires technical knowledge for proper installation and replacement
- May need specific model matching to ensure full compatibility
- Limited to applications within its specified voltage and amperage ratings
Non-Programmable Digital Thermostat for Home
The Non-Programmable Digital Thermostat for Home, like the Miuputake STN601, is an excellent choice for those seeking a straightforward, reliable control solution for single-stage heating and cooling systems. It features an LCD display with backlight, simple push-button and touch controls, and supports both 24VAC power and 2 AAA batteries, eliminating the need for a C-wire in most setups. Compatible with forced air, electric furnace, hot water, and heat pumps without auxiliary heat, it offers easy DIY installation within 30 minutes. Its adjustable features include temperature swing, calibration, and units switching, making it a practical, user-friendly option for maintaining comfortable home temperatures.
Best For: homeowners seeking a simple, reliable, non-programmable thermostat for single-stage heating and cooling systems that value easy DIY installation and straightforward operation.
Pros:
- Easy DIY installation with universal terminal blocks and clear instructions
- Supports both 24VAC power and battery operation, no C-wire needed in most cases
- User-friendly LCD backlight display with manual controls and adjustable settings
Cons:
- Limited compatibility, not suitable for heat pumps with auxiliary/emergency heat or multi-stage systems
- Non-programmable, which may not suit users seeking automated scheduling features
- Limited to single-stage heating/cooling applications, restricting advanced system support
BOJACK SPP5 Hard Start Capacitor Relay Replacement
The BOJACK SPP5 Hard Start Capacitor Relay is an ideal choice for technicians and homeowners seeking to improve compressor start-up performance, especially in systems with high starting current. It boosts starting torque by 300%, helping compressors start more reliably and reducing wear. Compatible with a wide range of refrigeration compressors, heat pumps, and heavy-duty motors, it’s easy to install with a simple parallel wiring setup. Designed for voltages from 115 to 288V, it’s suitable for various system sizes, from small window units to large commercial units. This relay guarantees smoother startups, prolongs compressor life, and enhances overall system reliability.
Best For: HVAC technicians and homeowners seeking to improve compressor startup reliability and extend the lifespan of air conditioning and refrigeration systems.
Pros:
- Boosts starting torque by 300%, ensuring more reliable compressor startups
- Compatible with a wide range of systems from small window units to large commercial units
- Easy to install with straightforward parallel wiring, reducing installation time and complexity
Cons:
- Limited to systems operating within 115-288V AC, not suitable for higher voltage applications
- Requires proper wiring knowledge to ensure correct installation and operation
- May not be compatible with all compressor models; verification needed before installation
Antoble Hard Start Kit SPP6 Relay for AC Compressors
If you’re looking to improve your air conditioning system’s startup performance, the Antoble Hard Start Kit SPP6 Relay is an excellent choice, especially for compressors that need a boost in torque. It enhances compressor starting power by increasing torque by 500%, making startup smoother and more reliable. Compatible with a wide range of units from 4000 BTU window ACs to large 120,000 BTU commercial systems, it’s easy to install—just connect it in parallel with the run capacitor. Built from high-quality materials, the relay is durable and tested for long-lasting performance. Plus, their responsive customer service guarantees you get support whenever needed.
Best For: homeowners and HVAC professionals seeking to improve startup reliability and torque performance of air conditioning compressors ranging from small window units to large commercial systems.
Pros:
- Significantly increases compressor starting torque by 500%, ensuring smoother startups
- Compatible with a wide range of AC units and compressor models for versatile use
- Easy installation with straightforward wiring, no loose parts or complex setup required
Cons:
- May require technical knowledge for proper installation in some systems
- Compatibility might vary with certain proprietary or specialized compressor models
- The effectiveness depends on correct wiring and installation; improper setup could reduce performance
Upgraded Digital Non-Programmable Thermostat with LCD Display
An upgraded digital non-programmable thermostat with an LCD display is an excellent choice for homeowners seeking straightforward, reliable temperature control for single-stage systems. It features a large blue LCD screen with easy-to-read characters, making it simple to monitor temperature and humidity at a glance. Designed for single-stage heat and cool setups, it’s compatible with electric or gas/oil systems and doesn’t require a C-wire for installation. With precise control within ±1°F/°C, quick response, and built-in features like calibration and compressor delay protection, it offers dependable comfort. Its simple push-button operation and clear instructions make setup and daily use hassle-free.
Best For: homeowners with single-stage heating and cooling systems seeking an easy-to-install, reliable thermostat with a clear display.
Pros:
- Large, easy-to-read blue LCD display with clear characters for quick monitoring
- Simple push-button controls and straightforward setup, no C-wire needed
- Accurate temperature control within ±1°F/°C and built-in features like calibration and compressor delay protection
Cons:
- Not compatible with multistage, heat pump, or hydronic heating systems
- Requires manual operation without programmable scheduling features
- Installation may require some basic wiring knowledge despite clear instructions
Endurance Pro 90-T40F3 Class 2 Transformers Thermostat
For those replacing old or failing transformers in HVAC systems, the Endurance Pro 90-T40F3 Class 2 Transformer stands out as a reliable choice thanks to its energy-limiting design and versatile compatibility. It works with 24V, 12V, or 2.5V AC control systems, including thermostats, air conditioning, and gas valves, supporting primary voltages of 120V, 208V, or 240V. Easy to install with color-coded leads and a foot mount, it provides approximately 28VAC output at no load. Rated 4.4 stars, users appreciate its durability, ease of wiring, and effectiveness in replacing old transformers, making it a dependable component for HVAC control systems.
Best For: homeowners and HVAC professionals seeking a reliable, easy-to-install transformer replacement for controlling thermostats, air conditioning, and gas valves in residential or industrial systems.
Pros:
- Easy installation with color-coded wiring and foot mount design
- Durable construction and good performance under load
- Compatible with multiple primary voltages (120V, 208V, 240V) and various control systems
Cons:
- Some units may vary in quality, requiring careful testing
- A few users reported high voltage readings (~27-28VAC) during operation
- Limited to 40VA ratings, which may not suit higher power requirements
BOJACK SPP6 Hard Start Capacitor for Air Conditioning Units
The BOJACK SPP6 Hard Start Capacitor is an excellent choice for those looking to enhance compressor performance in air conditioning units, especially when dealing with high starting torque demands. It increases compressor torque by 500%, helping prevent compressor aging, reduce startup stress, and extend lifespan. Suitable for units from 4,000 to 120,000 BTU and motors from 1/2 HP to 10 HP, it’s compatible with various AC systems, including window units and commercial HVAC. Easy to install, it connects in parallel with existing capacitors and features a simple wiring setup, making it a reliable upgrade for improved compressor startup and longevity.
Best For: HVAC professionals and homeowners seeking to improve the starting performance and longevity of air conditioning compressors, especially in high-demand or aging units.
Pros:
- Significantly increases compressor starting torque by 500%, reducing startup stress.
- Compatible with a wide range of air conditioning units from 4,000 to 120,000 BTU and motors from 1/2 HP to 10 HP.
- Easy to install with a simple wiring setup, connecting in parallel with existing capacitors without complex modifications.
Cons:
- May require some technical knowledge for proper installation in certain HVAC systems.
- Not suitable for units outside the specified voltage range of 115V-288VAC.
- Potential compatibility issues with very old or non-standard compressor models.
Senville LETO Series Mini Split Air Conditioner Heat Pump
Are you searching for an energy-efficient heating and cooling solution suitable for medium-sized spaces? The Senville LETO Series Mini Split offers 18,000 BTU, perfect for up to 1000 sq ft. It’s a versatile 4-in-1 system with cooling, heating down to 5°F, dehumidifying, and fan modes. Its inverter technology guarantees high efficiency with a SEER2 rating of 19. It’s Wi-Fi enabled, compatible with Alexa and a smartphone app for remote control and scheduling. Quiet at around 30 dB, it combines performance with a sleek design suitable for homes, offices, or retail spaces. Professional installation is recommended to maximize warranty and efficiency.
Best For: those seeking an energy-efficient, versatile heating and cooling solution for medium-sized spaces up to 1000 sq ft, with remote control and smart home compatibility.
Pros:
- High energy efficiency with a SEER2 rating of 19 and inverter technology
- Quiet operation at approximately 30 dB, ideal for residential or office environments
- All-season 4-in-1 system providing cooling, heating down to 5°F, dehumidifying, and fan modes
Cons:
- Professional installation recommended to ensure warranty and optimal performance
- Complex DIY setup involving refrigerant piping, pressure testing, and electrical wiring
- Higher upfront cost compared to basic window air conditioners or standalone units
MRCOOL DIY 18k BTU Ductless Mini Split AC & Heat Pump
If you’re looking for an energy-efficient and easy-to-install solution for heating and cooling a single room up to 750 square feet, the MRCOOL DIY 18k BTU Ductless Mini Split AC & Heat Pump stands out. It boasts up to 22.7 SEER2 efficiency thanks to its variable speed DC inverter compressor, which ensures *ideal* energy savings. Its DIY-friendly design includes a pre-charged 25-ft line set, requiring no special tools or training. With a 7-year compressor and 5-year parts warranty, plus Energy Star certification, it offers reliable performance and peace of mind. Perfect for year-round comfort, it’s an excellent choice for homeowners seeking simplicity and efficiency.
Best For: homeowners seeking an energy-efficient, easy-to-install heating and cooling solution for a single room up to 750 square feet.
Pros:
- Achieves up to 22.7 SEER2 efficiency with variable speed DC inverter compressor technology for optimal energy savings
- DIY installation with pre-charged 25-ft line set, requiring no special tools or training
- Comes with comprehensive warranties including a 7-year compressor and 5-year parts, plus Energy Star certification
Cons:
- Designed primarily for single-room applications; not suitable for large or multi-zone spaces
- Limited to 750 sq ft, so may not meet the needs of larger areas
- Installation may still be challenging for those uncomfortable with DIY projects despite the simplified process
YITAHOME 18000 BTU Mini Split Air Conditioner Heat Pump System
For homeowners seeking an energy-efficient and versatile heating and cooling solution, the YITAHOME 18000 BTU Mini Split Air Conditioner Heat Pump System stands out. It boasts a 21 SEER2 rating and inverter technology, saving up to 25% on energy compared to lower-SEER models. Designed for ductless installation, it can efficiently heat or cool a 1250 sq. ft. space from 5°F to 118°F. With multiple operational modes, Wi-Fi and Alexa compatibility, and quiet performance under 49 dB, it offers convenience and reliability. The system includes indoor/outdoor units, a complete installation kit, and a 5-year warranty—making it a strong choice for year-round comfort.
Best For: homeowners seeking an energy-efficient, versatile, and quiet heating and cooling solution for spaces up to 1250 sq. ft.
Pros:
- High energy efficiency with 21 SEER2 rating and inverter technology, saving up to 25% on energy costs
- Quiet operation under 49 dB, suitable for bedrooms and living areas
- Complete kit included with indoor/outdoor units and smart features like Wi-Fi and Alexa compatibility
Cons:
- Installation requires a licensed HVAC professional, which may add to overall cost and complexity
- Limited to specific power supply (208-230V), not suitable for all homes
- Excludes some installation accessories like shut-off valves and side protection grille
Albott Mini Split Air Conditioner Heat Pump (12000 BTU, 18.5 SEER2, 230V)
The Albott Mini Split Air Conditioner Heat Pump stands out as an ideal choice for those seeking reliable, energy-efficient climate control in small to medium-sized rooms up to 750 square feet. With a 12,000 BTU capacity and 18.5 SEER2 rating, it ensures efficient cooling and heating using inverter technology on 230V power. This versatile 4-in-1 system provides cooling, dehumidifying, heating, and fan modes, plus features like sleep, turbo, and timer functions for customized comfort. Easy to maintain with washable filters and eco-friendly R32 refrigerant, it operates dependably across a wide temperature range from 5℉ to 122℉.
Best For: homeowners or small business owners seeking energy-efficient, versatile climate control solutions for spaces up to 750 sq. ft.
Pros:
- High energy efficiency with 18.5 SEER2 rating and eco-friendly R32 refrigerant
- Versatile 4-in-1 system offering cooling, heating, dehumidifying, and fan modes
- Easy maintenance with washable filters and modular components
Cons:
- Requires 230V power supply, which may not be available in all locations
- Installation may need professional assistance despite the included kit
- Performance may decline in extreme temperatures outside the 5℉ to 122℉ range
PPSPP6 Relay and Hard Start Capacitor for Air Conditioners
The PPSPP6 Relay and Hard Start Capacitor is an ideal choice for anyone looking to improve the startup performance of single-phase PSC air conditioners. It’s compatible with SUPCO OEM SPP6 and various other brands, including RV rooftop units. Installation is simple—connect it directly to the existing run capacitor without complicated wiring. Made from high-quality materials, it’s built for durability and long-term use. This device reduces high amp start-up times, boosting compressor efficiency and system longevity. Customers praise its easy setup, reliable performance, and cost savings, making it a valuable addition for those seeking a dependable solution to enhance their AC’s startup and overall efficiency.
Best For: homeowners and technicians seeking an easy-to-install solution to enhance single-phase PSC air conditioner startup performance and efficiency.
Pros:
- Easy to install with straightforward wiring, saving time and effort
- Made from durable, high-quality materials for long-term reliability
- Improves compressor startup, reducing energy consumption and extending system lifespan
Cons:
- Only compatible with specific models like SUPCO OEM SPP6 and certain brands
- May require technical knowledge for proper installation in some setups
- Not suitable for multi-phase or inverter air conditioning systems
Factors to Consider When Choosing a Split System Heat Pump Relay
When choosing a split system heat pump relay, I focus on key factors like compatibility with my system and its electrical capacity needs. I also consider how durable it is in different environments and how easy it is to install. Ultimately, I look at the brand’s reputation to guarantee reliability and quality.
Compatibility With System
Choosing the right relay for your split system heat pump hinges on confirming compatibility with your existing setup. First, check that the relay’s voltage and amperage ratings match your system’s requirements to avoid electrical issues. Next, verify that the connection type and pin configuration are compatible with your control board or wiring setup. It’s also important to confirm the relay’s physical size and mounting method fit within your unit’s designated space. Additionally, consider system-specific needs, such as compatibility with inverter technology or particular control protocols, to ensure proper operation. Finally, review the relay’s environmental resistance features like corrosion protection and temperature tolerance, especially for outdoor installations. Proper compatibility guarantees reliable performance and prevents unnecessary system problems down the line.
Electrical Capacity Needs
Ensuring your relay can handle your heat pump’s electrical demands is crucial for reliable operation. You need to match or exceed the relay’s amperage rating with your system’s maximum current draw to avoid overloads and potential failures. Voltage compatibility is equally important; most HVAC controls run at 24V, so verify the relay supports this voltage. Consider the relay’s duty cycle and continuous operation ratings to ensure it performs reliably during extended use. Additionally, match the contact configuration—like SPST or DPDT—to your system’s switching needs for proper control. Finally, check the relay’s thermal and environmental ratings, especially if it’s installed outdoors or in harsh conditions, to guarantee durability and consistent performance over time.
Environmental Durability
Environmental durability is vital for split system heat pump relays because outdoor conditions can be harsh and unpredictable. A relay must resist moisture, dust, and salt spray to guarantee long-term reliability. Choosing one with an enclosure rated IP65 or higher provides protection against water ingress and environmental corrosion. Relays made with corrosion-resistant materials, like plated contacts and sealed housings, withstand tough weather conditions. It’s also imperative that the relay operates within a wide temperature range, typically from -40°F to 185°F, to perform consistently in extreme temperatures. Proper environmental durability minimizes the risk of failure caused by environmental stressors, reducing maintenance needs and system downtime. Investing in a relay with these features guarantees more dependable operation in challenging outdoor environments.
Ease of Installation
When selecting a split system heat pump relay, ease of installation can save you time and prevent headaches. A relay with straightforward wiring and minimal connections makes setup quicker and reduces the chance of errors. Clear, detailed instructions or diagrams are invaluable, helping you install correctly without needing professional help. Look for relays with plug-and-play features or compatible connectors to further speed up the process. Durability matters too; a sealed, weatherproof design simplifies outdoor installation and minimizes maintenance. Additionally, choosing a relay compatible with your existing system components and offering user-friendly wiring options prevents common installation challenges. Overall, prioritizing ease of installation ensures a smoother setup, saving you time and frustration right from the start.
Brand Reputation
How can you tell if a split system heat pump relay comes from a trustworthy brand? I look for positive customer reviews and a proven track record of reliable performance in HVAC components. Well-known brands usually meet industry standards and hold relevant certifications, which reassures me about product quality. An established manufacturer often offers better warranty support and responsive customer service, giving peace of mind. I also consider how long the brand has maintained consistent quality; a history of durability reduces the risk of frequent failures. Choosing a relay from a reputable brand often means better access to compatible replacement parts and technical assistance, which can extend the lifespan of my system. Overall, brand reputation is a key factor in ensuring long-term reliability.
Frequently Asked Questions
How Do Relay Failures Impact Heat Pump Performance?
Relay failures can seriously affect a heat pump’s performance. When a relay malfunctions, it might prevent the system from turning on or off correctly, leading to inconsistent heating or cooling. I’ve seen how a faulty relay can cause the compressor to run continuously or not at all, which wastes energy and risks damaging the system. Regular maintenance and prompt replacements keep the heat pump running smoothly and efficiently.
What Safety Precautions Are Needed When Installing Relays?
When installing relays, I always prioritize safety. I make sure to turn off the power supply before starting, use insulated tools, and wear protective gear to prevent shocks. I double-check wiring connections against the manufacturer’s diagram to avoid faults. Handling relays carefully and following proper procedures guarantees safe installation and reliable operation. Always consult a professional if you’re unsure—safety first when working with electrical components.
Are Compatible Relays Available for Older Heat Pump Models?
I understand you’re wondering if compatible relays are available for older heat pump models. The good news is, many manufacturers offer universal or adaptable relays that can work with older systems. I recommend checking your heat pump’s specifications and consulting with a professional to guarantee proper fit and function. It’s essential to choose the right relay to maintain efficiency and avoid potential damage.
How Often Should Split System Relays Be Replaced?
I recommend checking your relay every few years, especially if your system shows signs of trouble like inconsistent heating or cooling. Generally, relays last around 5 to 10 years, but this can vary based on usage and environmental conditions. I suggest having a professional inspect your system regularly so they can replace the relay promptly before it causes bigger issues. Staying proactive keeps your system running smoothly!
Can Relays Improve Energy Efficiency in Heat Pumps?
I get it—you’re wondering if relays can really boost your heat pump’s energy efficiency. The truth is, yes! When relays function properly, they guarantee the system runs smoothly and avoids unnecessary energy use. A faulty relay can cause your heat pump to work harder, wasting energy. So, keeping relays in top shape or upgrading them can make a noticeable difference in your system’s efficiency and your energy bills.
Conclusion
Choosing the right split system heat pump relay is like finding the perfect steed for a modern-day knight—crucial for reliable heating and cooling. With options ranging from the SUPCO SPP6 to the YITAHOME mini split, you’ll find one that fits your needs and budget. Remember, a good relay keeps your system running smoothly—think of it as the magic wand of HVAC. Trust me, with the right choice, you’ll stay cozy through any weather, no DeLorean required.
