New
Arrivals/Restock
BlueStars CSR-U2 Hard Start Capacitor Kit - Compatible for Air Conditioner 3 1/2 to 5 Ton Units
4.1 (49 items)
Limited Time SaleUntil the end
08
56
09
US$19.19 cheaper than the new price!!
Free shipping for purchases over $99 ( Details )
Free cash-on-delivery fees for purchases over $99
Free cash-on-delivery fees for purchases over $99
See all stores
Please note that the sales price and tax displayed may differ between online and in-store. Also, the product may be out of stock in-store.
Used US$12.80
Product details
| Management number | 221112440 | Release Date | 2026/05/03 | List Price | US$12.80 | Model Number | 221112440 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
- MODEL APPLICATION: CSR-U2 Hard Start Capacitor Kit designed for 3.5 to 5 ton air conditioning units. Helps provide the needed boost for AC compressors during startup, especially on older or hard-starting systems.
- BOOSTS COMPRESSOR PERFORMANCE: This part delivers powerful starting torque up to a 500% increase to help the compressor start more easily under heavy load or low-voltage conditions. By reducing startup strain and shortening the time it takes for the compressor to reach full speed, this kit supports smoother operation and may prolong compressor service life. Ideal for units that struggle to start or frequently trip breakers.
- WIDE COMPATIBILITY: Compatible with many residential HVAC systems using a standard 3.5 to 5 ton setup. Works as a replacement option for CSR-U2, CSRU2, and similar 5-2-1 style hard start kits.
- EASY INSTALLATION: Designed for straightforward installation by HVAC professionals. Clear wiring leads allow fast connection to existing terminals for immediate performance improvement.
- IMPORTANT SAFETY WARNING – PROPER INSTALLATION REQUIRED: This hard start capacitor kit must be installed correctly and according to the wiring diagram. Incorrect wiring, improper installation, or using the product outside recommended conditions may cause capacitor failure or damage to the AC system. If you are unsure about installation, please message us before installing – we’re always happy to help ensure safe and proper use.
- DURABLE, HIGH-QUALITY BUILD: Constructed with reliable components engineered to handle frequent high-load starts. Built to maintain strong, stable performance across demanding temperature conditions.
- 100% LIFETIME PROTECTION: Enjoy reliable performance with our lifetime protection, ensuring that your product will always be covered for any defects or issues that may arise.
| Brand Name | BlueStars |
|---|---|
| Item Shape | Square, Rectangle |
| Part Number | CSR-U2 |
| Manufacturer | BlueStars |
| Material Type | Aluminum, Ceramic, Plastic, Tantalum |
| Mounting Type | Snap-In Mount |
| Included Components | BlueStars 5-2-1 CSR-U2 Hard Start Capacitor Kit |
Bestseller ranking
Growth Formula
Customers who viewed this product also viewed
Capacitors
Correction of product information
If you notice any omissions or errors in the product information on this page, please use the correction request form below.
Correction Request Form