{"product_id":"5-2-1-compressor-saver-hard-start-kit-csr-u3-3-5-to-5-ton-units","title":"5-2-1 Compressor Saver Hard Start Kit CSR-U3 3.5 to 5 Ton Units","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003e5-2-1 Compressor Saver Hard Start Kit CSR-U3 3.5 to 5 Ton Units\u003c\/h2\u003e\n    \u003cp\u003eA plug-and-play compressor hard start kit for 3.5 to 5 ton residential and light commercial AC units. Reduces compressor startup time by up to 50% and lowers inrush current, extending compressor life and preventing low-voltage startup failures during peak summer demand.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eDesigned for 3.5 to 5 ton AC and heat pump compressors\u003c\/li\u003e\n\u003cli\u003eReduces startup time from 1 second to under 1\/2 second\u003c\/li\u003e\n\u003cli\u003eLowers inrush current by up to 50% — protects against brown-outs\u003c\/li\u003e\n\u003cli\u003eUniversal plug-and-play installation — no wiring modifications needed\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eTonnage: 3.5 to 5 tons\u003c\/li\u003e\n\u003cli\u003eVoltage: 187-264 VAC\u003c\/li\u003e\n\u003cli\u003eStart capacitor: Built-in\u003c\/li\u003e\n\u003cli\u003ePotential relay: Built-in\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eHard start kit with built-in relay and capacitor\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow do I know if my AC needs a hard start kit?\u003c\/h4\u003e\n\u003cp\u003eSigns include: compressor struggles to start on hot days, breaker trips on startup, lights dim when AC kicks on, or the compressor is more than 5 years old. A hard start kit is cheap insurance for compressor longevity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWill this void my compressor warranty?\u003c\/h4\u003e\n\u003cp\u003eNo, hard start kits are widely accepted by manufacturers and do not void warranties. Many manufacturers recommend them for systems in hot climates or on long line sets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow do I install it?\u003c\/h4\u003e\n\u003cp\u003eConnect the two wires to the compressor contactor's load side — one to the Start terminal and one to the Common terminal. No wiring changes to the existing system are needed. Takes about 5 minutes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between CSR-U1, U2, and U3?\u003c\/h4\u003e\n\u003cp\u003eThey cover different tonnage ranges: U1 for 1-3 tons, U2 for 2-3.5 tons (can overlap), and U3 for 3.5-5 tons. Choose based on your system's compressor size.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004087648627,"sku":"NHVAC-HARD-R89ZGL","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/51ylfbC84GL._AC_SL1500.jpg?v=1781918097","url":"https:\/\/nationalhvacparts.com\/products\/5-2-1-compressor-saver-hard-start-kit-csr-u3-3-5-to-5-ton-units","provider":"National HVAC Parts","version":"1.0","type":"link"}