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Description
5-2-1 CSR-U1 Hard Start Capacitor Kit for 1 to 3 Ton AC Units5 2 1 CSR U1 Hard Start Capacitor Kit Key Features Two wire hard start kit for single phase compressors Includes a potential relay and start capacitor Reduces compressor start up time and energy consumption Assists older or tight compressors with starting Installs in series with the compressor run winding Replaces Cross Reference Part Numbers CSRU1 SPP6 SPP5 RCO410 RCO810 RCO410D 88 5440 HN61PC005 HN61KA023 CKFU1 Compatibility & Fitment Designed for 1
5-2-1 CSR-U1 Hard Start Capacitor Kit
Key Features
- Two-wire hard start kit for single-phase compressors
- Includes a potential relay and start capacitor
- Reduces compressor start-up time and energy consumption
- Assists older or tight compressors with starting
- Installs in series with the compressor run winding
Replaces / Cross-Reference Part Numbers
- CSRU1
- SPP6
- SPP5
- RCO410
- RCO810
- RCO410D
- 88-5440
- HN61PC005
- HN61KA023
- CKFU1
Compatibility & Fitment
- Designed for 1 to 3 Ton (12,000 to 36,000 BTU) air conditioning and heat pump units
- Compatible with single-phase 115V to 288V systems
When to Replace
- Compressor hums but struggles or fails to start
- A/C system causes significant dimming of lights on start-up
- Circuit breaker trips when the compressor attempts to start
- Proactive installation on older units to extend compressor life
Installation Tips
- Disconnect all electrical power to the A/C unit before installation.
- Safely discharge any existing capacitors in the system.
- Connect the two wires from the kit to the compressor's "Run" and "Common" terminals.
- Mount the device securely inside the electrical control panel.
- Professional installation by a qualified HVAC technician is recommended.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
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Product Reviews
★★★★★ 5
Excellent dog balls — safe design and very durable
Style: Fetch Balls (Pack of 3), Size: 2.5 inch
These fetch balls from Amazon Basics are fantastic, and my dog absolutely loves them. One of the biggest reasons I prefer these over other brands is the hole that runs through the center of the ball. This is a very important safety feature: if a dog were to accidentally get the ball stuck in the back of the throat, the hole allows air to pass through. That small detail could literally make a life-saving difference.
Aside from the safety benefit, they bounce well, are easy to clean, and hold up to a lot of playtime. They’re firm but not rock-hard, and my dog goes crazy for them. Great value, great quality, and a thoughtful design.
Highly recommended for dog owners who want a safer alternative to standard solid rubber balls.
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Reviewed in the United States on December 1, 2025
★★★★★ 5
Great ball for heavy chewers
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Great toy for my Doberman. She chews through tennis balls in about 15 minutes but these are very durable. She likes to chase them but also just chew on them.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Durable
Style: Fetch Balls (Pack of 2), Size: 3 inch
Very bouncy. I like the noise it makes when you throw it. Pretty durable. Good size. Dog loves to play with them. Good material. Easy to use.
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Reviewed in the United States on April 5, 2026
★★★★★ 4
My dog loves glowing fetch at night!
Style: Glow Balls (Pack of 3), Size: 2.5 inch
Fantastic. Sturdy. My dog loves them
Glow in the dark is great for fetch at night. I keep a flashlight with me because the glow doesn't last really long. But they charge very quickly and are really bright.
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Indestructible
Style: Fetch Balls (Pack of 2), Size: 3 inch
These balls are indestructible! We have a lab and a lab mix and they CANNOT damage these balls. They love them for fetch and to just chew on them (slightly squishy, but NO damage). Best toys we have bought for them.
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Reviewed in the United States on April 19, 2026