Your well pump hums but won’t start. Or it runs but loses pressure quickly. A worn-out capacitor could be the reason. This guide covers the best replacement capacitors for well pumps, including start and run capacitors for Franklin, Hayward, and other common models. If you are unsure about your pump type, our guide on what pump you need for your well can help.
Pros
- Straightforward installation with no polarity concerns.
- Restores malfunctioning motors effectively, as confirmed by positive reviews.
- Compact and lightweight for versatile placement.
- Strong overload resistance ensures durability.
- Affordable replacement compared to OEM parts.
Cons
- Plastic housing may not be as robust as metal in extreme conditions.
- Specific 20uF capacitance limits use to certain motors only.
- No included mounting hardware or instructions beyond basic.
The BlueNatHxRPR 20uF CBB60 run capacitor is a replacement part designed for single-phase motors in various appliances. It is ideal for homeowners and DIYers looking to fix air compressors, water pumps, or washing machines without calling a technician.
Standout features include its compact rectangular shape and quick connect terminals, which simplify installation. The capacitor has no polarity, so you can connect it either way, reducing the chance of errors. User reviews confirm it brings dead motors back to life reliably.
Build quality is decent with a durable plastic shell that withstands typical operating conditions. The 450V AC rating and 5% tolerance ensure stable performance. However, the plastic casing may not be as impact-resistant as metal alternatives in industrial settings.
One drawback is that this capacitor is specifically 20 microfarads, so it only works with motors requiring that exact capacitance. Also, the snap-in mount may not fit all brackets. But for its price, it offers excellent value.
Overall, this capacitor is a solid choice for restoring single-phase motors. With high customer satisfaction and easy installation, it earns a strong recommendation for budget-conscious repairs.
Capacitance: 20uF ±5%
Voltage: 450V AC
Frequency: 50/60Hz
Shape: Rectangular
Dimensions: 75x38mm (3.0x1.5in)
Material: Plastic
Mounting: Snap-In
Temperature: 40/70/21
Model: RPR-CBB60-20U
Pros
- Excellent build quality with aluminum case and steel cover
- High customer satisfaction with 4.7 out of 5 stars from 728 reviews
- Versatile replacement for many AC units and compressors
- Safety features prevent capacitor failure and explosion
- Oval design saves space in crowded electrical compartments
Cons
- May require professional installation for those unfamiliar with capacitors
- Only 10 uF capacity, not suitable for larger motors needing higher capacitance
- Slightly heavier than some round capacitors due to oval shape
The BOJACK 10 uF capacitor is a high-quality replacement part designed for AC motors, compressors, and fan motors in air conditioners and heat pumps. It is an oval CBB65 run start capacitor rated at 370V/440V AC, making it suitable for both start and run applications in residential and light commercial HVAC systems.
Standout features include its UL recognized anti-explosion pressure switch, which enhances safety by preventing catastrophic failure. The capacitor operates reliably across a wide temperature range from -40°C to +70°C, ensuring performance in extreme climates. With a tolerance of ±6%, it provides consistent capacitance for smooth motor operation.
Build quality is impressive with an aluminum case and steel cover, offering durability and heat resistance. The oval shape allows it to fit into confined spaces where round capacitors may not. It is also lightweight, making installation easier. The capacitor is designed to replace many common models, including HC91CA010D and 97F9002, simplifying inventory for technicians.
One potential drawback is that the 10 uF capacity may not be sufficient for larger motors requiring higher microfarad ratings. Additionally, while the capacitor is user-friendly, those without electrical experience should consider professional installation to avoid injury or damage. The product has received overwhelmingly positive reviews, with a 4.7-star rating from hundreds of customers.
Overall, the BOJACK 10 uF oval capacitor is an excellent choice for HVAC repairs and maintenance. Its safety certifications, robust construction, and wide compatibility make it a reliable option. For homeowners or technicians needing a durable and safe replacement capacitor, this product delivers strong value.
Pros
- UL listed for electrical safety and performance standards.
- 10-year warranty provides exceptional value and peace of mind.
- High customer satisfaction with a 4.7 out of 5 star rating.
- Works as a direct replacement for many popular capacitor models.
- Easy three-terminal labeling simplifies DIY installation.
Cons
- Only available in the 45+5 uF capacitance value, limiting use to specific systems.
- Metal case adds weight compared to some plastic alternatives.
- No mounting bracket included; may require additional hardware for secure placement.
The TTAOMI 45+5 uF dual run capacitor is a purpose-built replacement for HVAC capacitors in air conditioners, heat pumps, and condensers. It combines a 45 microfarad rating for the compressor and a 5 microfarad rating for the fan motor in one convenient unit, making it ideal for technicians and homeowners tackling common AC repair jobs.
Standout features include UL certification, which assures the capacitor meets rigorous safety and performance standards. Real-world performance matches the positive feedback: users report that it fixed fan motor startup issues and restored compressor operation quickly. The 10-year warranty further demonstrates confidence in its durability, while the three clearly labeled terminals (Herm, Fan, Common) simplify installation, even for first-time DIYers.
Build quality is solid with a metal case that withstands temperatures from -40°F to 158°F. The compact dimensions (2 inches wide by 5 inches tall) allow it to fit into standard condenser compartments. However, the metal construction adds some weight, and the lack of a mounting bracket means you may need to secure it with zip ties or existing hardware.
A potential drawback is that this capacitor is only offered in the 45+5 uF configuration, so it won't work for systems requiring different capacitance values. Additionally, while the terminals are clearly labeled, the capacitor does not include wiring adapters, so you must ensure your existing wires are compatible. These are minor considerations for a product that otherwise delivers excellent value.
Overall, the TTAOMI 45+5 uF dual run capacitor earns a strong recommendation. Its UL listing, generous warranty, and high customer ratings make it a trustworthy choice for HVAC repairs. For anyone needing a reliable replacement for a failing dual run capacitor, this product is a smart investment.
Pros
- Works flawlessly as a direct replacement for many common capacitor models.
- Fast shipping often arrives within 24 hours, minimizing AC downtime.
- Easy to install with labeled terminals and a compact round design.
- Durable polypropylene construction withstands high temperatures and voltage fluctuations.
- Excellent value compared to professional service calls or OEM parts.
Cons
- Requires careful handling due to risk of electrical shock; safety precautions are essential.
- May not fit all units; verify dimensions and capacitance before purchase.
- No mounting bracket included, so you may need to reuse the existing bracket or use adhesive.
The QYCKFIXR 45+5 uF dual run capacitor is a high-quality replacement component designed for air conditioners and heat pumps. It combines a 45 uF and 5 uF capacitance in one unit, serving both the compressor and fan motor. This capacitor is intended for homeowners and technicians who need a reliable, easy-to-install part to restore cooling or heating quickly.
Standout features include a 10-year coverage and compliance with strict US standards (EIA-456-A and IEC 60252-1:2001). Real-world performance is excellent: hundreds of buyers report that it works flawlessly, often arriving within 24 hours. The capacitor is a direct replacement for many popular models, and the clear terminal labels (Herm, Fan, Common) make wiring straightforward even for first-time users.
The design is robust with a round polypropylene case rated for up to 440V and a wide temperature range of -40°C to 70°C. Safety is addressed with a 10,000 AFC rating, meaning it can handle high fault currents without failing dangerously. The compact dimensions (2.52 inches diameter, 3.93 inches height) allow it to fit in most standard capacitor mounting locations.
One potential drawback is the need for careful installation due to the risk of electrical shock; always discharge the old capacitor and turn off power before working. Additionally, while it replaces both 370V and 440V capacitors, it may not be compatible with every unit, so double-check your existing capacitor’s specs. Some users might also need to provide their own mounting bracket, as one is not included.
Overall, the QYCKFIXR 45+5 uF capacitor is a top choice for anyone needing a dependable dual run capacitor. Its combination of durability, easy installation, and long coverage makes it a smart buy for DIY repairs or professional use. Given the strong customer satisfaction and high rating, this capacitor comes highly recommended.
Pros
- Exact OEM specification replacement
- Made in USA by Barker Microfarads
- Fits multiple Franklin models
- Compact design fits standard control box
- High customer satisfaction rating
Cons
- No returns on electronic components
- Not a universal fit, verify your control box model
- Only the capacitor, not a full control box
This start capacitor is a consumable component engineered for Franklin 1HP, 1.5HP, and 2HP well pump control boxes. It is a direct replacement for Franklin part number 275464113 and also fits control box models 2823008110, 2823018110, 2801084915, 2823018310, and 2823508110. If your pump is slow to start, hums, or trips the breaker, a weak capacitor may be the culprit.
Made in the USA by Barker Microfarads (BMI), this capacitor offers a 105-126 MFD range at 220VAC and works on 50/60Hz systems. The capacitance range matches the original Franklin spec, ensuring proper starting torque and smooth motor operation. Built with a plastic case and an 85°C temperature rating, it handles typical well pump duty cycles effectively.
The capacitor measures 3.35 inches high by 2.15 inches in diameter with a snap-in mount that fits the same mounting clips as the factory original. The cylindrical design is compact and durable, and the markings clearly show MFD and voltage ratings. Replacing a weak start capacitor with this unit restores full performance without replacing the entire control box.
The main drawback is the no-return policy for electronic components, so double-check your control box model before ordering. Also, this is only the start capacitor, not a complete control box or run capacitor. For most Franklin-compatible systems, it is an exact fit, but if you have a non-listed brand, verify compatibility via your existing capacitor spec.
For owners of Franklin 1HP to 2HP well pump systems, this TuhorsePumps start capacitor is a reliable and cost-effective replacement. It delivers OEM-grade specs in a USA-made package, and the high user rating confirms its performance. Skip the service call and keep your water flowing by swapping in this capacitor at the first sign of starting trouble.
Pros
- Matches Franklin part #275464118 as a direct replacement.
- Well rated by customers at 4.6 out of 5 stars.
- Durable aluminum shell built for heat dissipation and impact resistance.
- Easy installation using existing control box mounting hardware.
- Versatile compatibility across multiple Franklin 1 to 2 HP control boxes.
Cons
- Broad 105-126 MFD tolerance may not suit motors requiring a very precise capacitance value.
- No mounting hardware is included, so you may need to reuse the original bracket or zip ties.
- Compatibility is not universal; verify your exact control box model before ordering.
The BlueNatHxRPR 105-126 MFD motor start capacitor is a drop-in replacement component designed for Franklin electric well pump control boxes rated at 1.0, 1.5, and 2 HP. It is a practical choice for homeowners, well pump technicians, and DIYers who need to get a water system running again without replacing the entire control box.
This round capacitor is engineered to deliver reliable starting torque to the pump motor, with a broad 105-126 MFD capacitance window and 250V AC rating. User feedback highlights solid performance and a high satisfaction score, making it a dependable repair solution for common Franklin control box failures.
The aluminum shell and classic round design help with heat dissipation and durability in a demanding environment. It measures 3.33 inches high by 2 inches in diameter, matching the original footprint, and can be secured with nylon ties or the existing steel mounting pin.
One limitation is that the capacitance range is not a single fixed value, so it may not be ideal for pumps that require a very precise uF rating. Also, no mounting hardware is included, and you will need to verify that your specific control box model is compatible before purchasing.
For most Franklin 1.0, 1.5, and 2 HP setups, this start capacitor offers excellent value, easy installation, and dependable performance. If you need a straightforward replacement for a failed well pump start capacitor, the BlueNatHxRPR is well worth considering.
Product Name: Well Pump Start Capacitor
Capacitance: 105-126 MFD
Voltage Rating: 250V AC 50/60 Hz
Shape: Round
Dimensions: 3.33 inches height x 2.0 inches diameter
Net Weight: 4.2 oz
Material: Aluminum shell
Compatible Replacements: Franklin Part #275464118
Compatible Control Boxes: 2823008110, 2823018110, 2801084915, 2823018310, 2823508110
Pros
- Excellent value and quality with high customer satisfaction (4.6 stars)
- Easy to install with no wiring changes required
- Long lifespan up to 30,000 hours reduces replacement frequency
- UL and international certifications ensure safety and reliability
- Wide application covers pool pumps, well pumps, and AC motors
Cons
- Capacitance tolerance of ±20% may not suit precision applications
- Single capacitor pack; multi-pack not available for bulk replacements
- Requires proper discharge before handling to avoid electrical shock
The BlueStars 161-193 uF MFD 125 VAC Motor Start Capacitor is a robust replacement component designed for single-phase AC motors commonly found in pool pumps, well pumps, air conditioners, and compressors. It is UL and CUL listed, meeting stringent US and Australian safety standards, which gives users confidence in its reliability and performance.
With a capacitance range of 161-193 microfarads and a voltage rating of 125 VAC, this capacitor is a direct fit for many residential and light commercial motors. Customer reviews highlight its easy swap installation, often taking just 15 minutes and saving hundreds of dollars in service calls. The product boasts a 4.6-star average rating from nearly 200 reviews, with many users praising its quality and perfect fit.
Built to last, the capacitor offers an operational life of up to 30,000 hours and can withstand temperatures from -40°F to +149°F. Its round shape and top-mounted terminals make it simple to replace without modifying existing wiring. The included lifetime protection ensures that any defects or issues are covered for the life of the product.
One potential drawback is the capacitance tolerance of ±20%, which may be too wide for some precision applications. Additionally, the capacitor is sold as a single unit, so those needing multiple replacements will have to buy separately. As with any electrical component, proper safety precautions (discharging the old capacitor) are essential to avoid shock.
Overall, the BlueStars 161-193 uF Motor Start Capacitor is an excellent choice for DIYers and professionals alike who need a reliable, safe, and cost-effective solution for a non-starting motor. Its high ratings, long lifespan, and certifications make it a top contender in its category.
Capacitance: 161-193 uF MFD
Rated Voltage: 125 VAC
Tolerance: ±20%
Shape: Round
Terminal Size: 2.8 x 1.45 inches
Operating Temperature: -40°F to +149°F
Lifetime: Up to 30,000 hours
Certifications: UL, CUL, CEL, TUV SUD
Application: 50/60 Hz AC motors
Included: 1 Capacitor
Pros
- High-quality USA-made capacitor with consistent capacitance values.
- Exact fit for popular Franklin and CRC well pump control boxes.
- Durable copper construction withstands heat and vibration.
- Trusted by hundreds of users with overwhelmingly positive feedback.
- Competitive price for a premium replacement component.
Cons
- No returns accepted for electronic components, so verify compatibility before purchase.
- Limited to 1/2 and 3/4 HP pump motors; not suitable for larger or smaller systems.
- Capacitance tolerance (59-71 MFD) may require confirmation for precise applications.
The TuhorsePumps 59-71 MFD start capacitor is a straightforward replacement part designed for Franklin 1/2 and 3/4 HP well pump control boxes. If your pump motor hums but fails to start, a weak capacitor is often the culprit. This unit, manufactured by Barker Microfarads in the USA, restores reliable starting power and extends the life of your pump system.
Standout features include its precise 59-71 microfarad range and 220VAC rating, which match the original Franklin specifications exactly. The copper construction and 105°C temperature rating ensure it can handle the heat and electrical stress common in well pump environments. Users consistently report that it fits perfectly and solves starting issues on the first try.
Real-world performance is excellent: with a 4.6-star average from over 250 reviews, most customers note immediate improvement in motor startup. The capacitor is compact (2.15 inches wide, 3.35 inches tall) and fits into standard control boxes without any modifications. Installation is simple for anyone comfortable with basic electrical work.
One honest drawback is the no-return policy on electronic components, so double-check your control box model (Franklin 2801054915 or CRC 2824075015) before ordering. Also, the capacitance tolerance (59-71 MFD) means it may not be ideal for motors that require a very specific capacitance value outside that range.
Overall, this is a reliable, well-made replacement capacitor that delivers exactly what it promises. For homeowners and technicians maintaining Franklin-based well pumps, it is a cost-effective and trusted solution backed by strong customer satisfaction.
Capacitance: 71 microfarad (range 59-71 MFD)
Voltage: 220VAC, 50/60Hz
Dimensions: 2.15" diameter x 3.35" height
Temperature Rating: 105°C
Material: Copper
Shape: Cylinder
Compatible With: Franklin 275464105, 2801054915, CRC 2824075015
Manufacturer: Barker Microfarads (BMI)
UPC: 030955064147
Pros
- Broad compatibility with popular Hayward pump models and sizes
- Dual voltage support (110V/220V) increases versatility
- Copper construction enhances longevity and electrical efficiency
- Easy snap-in installation saves time and effort
- Affordable price point for a critical pump component
Cons
- Only compatible with specific Hayward Super Pump and Max Flo models; verify your pump's capacitor requirements before ordering
- Capacitor does not include mounting bracket or hardware; you may need to reuse existing clips
- Some users report that the capacitance tolerance could be tighter for optimal performance
The GEAIN Pool Pump Motor Start Capacitor is a direct replacement capacitor designed for Hayward Super Pump and Max Flo pumps ranging from 0.75 to 1.5 horsepower. It is intended for homeowners and pool service technicians who need to restore a pump that struggles to start or hums without spinning.
With a capacitance of 161 microfarad and support for both 110V and 220V motors, this capacitor delivers the necessary starting torque to get your pump running smoothly. Real-world feedback from over 150 buyers shows a 4.4-star rating, indicating reliable performance and an easy drop-in fit for most applications.
The capacitor features a copper core and a round snap-in design, which promotes efficient electrical transfer and simplifies installation. Many users note that replacing their old failed capacitor with this GEAIN unit resolved their pump starting issues immediately, with no additional modifications needed.
One potential drawback is that compatibility is limited to specific Hayward models. Always double-check your pump's original capacitor specifications before purchasing. Additionally, the capacitor does not include mounting hardware, so you may need to reuse the existing clip or bracket.
Overall, the GEAIN start capacitor offers excellent value for a common pool pump repair. It is a cost-effective, high-quality alternative to OEM parts, backed by solid customer reviews and a straightforward installation process. If your Hayward pump is slow to start or fails to start, this capacitor is a smart first step to try.
Pros
- Reliable performance as confirmed by positive customer reviews
- Affordable price compared to OEM capacitors
- Durable copper material withstands power surges
- Compact design fits standard control boxes
- Quick shipping and responsive customer support
Cons
- Some units may have internal movement causing a rattle when shaken
- Not an original Franklin part, which may concern brand-loyal users
- Smaller physical size than some original capacitors, though ratings match
The Poweka 105-126 uf motor start capacitor is designed as a replacement for Franklin well pump control boxes, compatible with 1HP, 1.5HP, and 2HP models. It is ideal for homeowners or technicians needing a cost-effective alternative to OEM parts.
With a capacitance range of 105-126 uF and voltage rating of 220-250VAC, this capacitor matches the specifications required by many Franklin control boxes. Customer reviews highlight its reliable performance and quick delivery, with many users reporting successful replacements.
The capacitor features a copper construction and a compact round shape that fits easily into standard control boxes. It is rated for temperatures from -40 to +65 degrees Celsius, ensuring durability in various environments.
Some users note that the capacitor is slightly smaller than the original, and a few have reported a slight internal rattle. As a non-OEM part, it may not carry the same brand assurance, but it is fully functional and backed by customer support.
Overall, the Poweka capacitor pack offers excellent value for money, providing two units for a reasonable price. For those seeking a dependable replacement for Franklin well pump control boxes, this is a solid choice.
- Capacitance: 105-126 uF (MFD)
- Voltage: 220-250VAC
- Frequency: 50/60 Hz
- Temperature Range: -40 to +65 degrees Celsius
- Material: Copper
- Shape: Round
- Dimensions: 3.35 inches height x 1.44 inches diameter
- Pack Size: 2 capacitors
- Compatible with Franklin part numbers 2823008110, 2823018110, 2801084915, 2823018310, 2823508110
Buying Guide for Well Pump Capacitors
Capacitance and Voltage Ratings
Every capacitor has a capacitance value measured in microfarads (MFD or uF) and a voltage rating. Using the wrong capacitance can cause the motor to overheat or fail to start. Always match the rating printed on your old capacitor. For example, the 105-126 MFD (uF) 1.0 1.5 and 2 HP Well Pump capacitor from TuhorsePumps is designed for Franklin control boxes requiring that range. For run capacitors, the voltage must equal or exceed the original, such as the 370V/440V ratings on the BOJACK 10 uF.
If you are replacing a dual-run capacitor like the 45+5 uF models, verify both capacitance values and the voltage. The AC Capacitor 45+5 uF from QYCKFIXR works for both 370V and 440V systems. For more on pump system compatibility, see our well pump kit with pressure tank guide.
Type of Capacitor: Start vs. Run
Start capacitors provide a jolt of energy to kick the motor into motion. Run capacitors maintain a steady current while the motor is running. Well pump control boxes typically use start capacitors, while some systems also include a run capacitor. The 105-126 MFD Motor Start Capacitor from BlueNatHxRPR is a common start capacitor for Franklin pumps. For pool pumps or HVAC units, run capacitors like the 45+5 uF Dual Run from TTAOMI are essential.
Choosing the wrong type can damage your motor. If your pump hums but does not start, the start capacitor is likely the issue. For a deeper look at pump motor options, read our well pump with soft start article.
Compatibility with Your Pump Model
Capacitors must match the specific pump model and control box. Franklin pumps often use capacitors with part numbers like 275464113 or 275464105. The 59-71 MFD capacitor from TuhorsePumps fits Franklin 1/2 HP and 3/4 HP control boxes. For Hayward pool pumps, the Pool Pump Motor Start Capacitor from GEAIN is a direct fit for Super Pump and Max Flo models.
Always check your control box label or manual before ordering. Our quiet well pumps guide can help you identify compatible systems if you are upgrading to a quieter model.
Build Quality and Safety Certifications
Look for capacitors with UL, CUL, or ETL certification. These ensure the capacitor meets safety standards and can handle the electrical load. The BlueStars 161-193 uF capacitor is UL listed and built to US and Australian standards. The Poweka 105-126 uF pack of two offers a cost-effective solution with verified performance.
Durable construction also matters. Capacitors with aluminum cases or high-temperature ratings last longer. For a complete pump setup, see our well pump kit for home guide.
Final Thoughts
For most Franklin well pumps, the 105-126 MFD (uF) 1.0 1.5 and 2 HP Well Pump from TuhorsePumps is a reliable start capacitor that directly replaces the factory part. If you need a versatile run capacitor for HVAC or pool pumps, the BOJACK 10 uF offers excellent value and broad compatibility. Both options are highly rated and built to last, so you can restore your water supply with confidence.
Frequently Asked Questions
How do I know if my well pump capacitor is bad?
A bad capacitor often causes the pump to hum but not start, or to run slowly and overheat. You can measure capacitance with a multimeter; if it reads outside the rated range, replacement is needed. In 2026, many homeowners also notice a bulging or leaking capacitor as a visible sign of failure.
Can I replace a well pump capacitor myself?
Yes, if you have basic electrical knowledge and always turn off power first. Discharge the old capacitor with an insulated screwdriver, note the wiring, and install the new one with the same rating. For step-by-step instructions, our well pump kit for home guide includes wiring tips.
What size capacitor does my well pump need?
The size depends on your pump’s horsepower and motor design. Common start capacitor ranges are 59-71 MFD for 1/2 HP, 105-126 MFD for 1-2 HP, and 161-193 MFD for larger motors. Always check the label on your old capacitor or consult your pump manual. For run capacitors, values like 10 uF or 45+5 uF are typical for smaller motors.
How often should I replace a well pump capacitor?
Capacitors degrade over time due to heat and electrical stress. Many last 5-10 years, but frequent cycling or power surges can shorten their life. If your pump struggles to start in 2026, it is wise to replace the capacitor as a first step before considering a new pump.
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