{"product_id":"carrier-control-board-fa4cnc042008aaaa","title":"OEM Carrier Control Board HK42FZ035 for Model FA4CNC042008AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Control Board HK42FZ035 for Model FA4CNC042008AAAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier control board (HK42FZ035) runs the core logic of your FA4CNC042008AAAA fan coil unit, coordinating blower timing, thermostat calls, and integrated safety functions. A failing board often shows up as a system that won't start, an unresponsive blower, flashing fault codes, or erratic on-off cycling. Built and programmed to Carrier's factory specifications, this authentic replacement is an exact match for the FA4CNC042008AAAA, so you skip the compatibility and reprogramming problems that plague universal boards. Installing the correct OEM board restores accurate fan control, proper sequencing, and the safety monitoring that safeguards your motor and heating elements. The job is rated moderate to advanced: most pros finish in 30 to 45 minutes by transferring connections one wire at a time — photograph the layout first and keep power off at the breaker. Because it's a true Carrier part, performance and fit are guaranteed straight out of the box. Place your order before 3PM CST and it ships the same day to get your system back online fast. Our team can confirm your board revision before purchase if needed.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FA4CNC042008AAAA.\u003c\/p\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping before 3 PM CST. 30-day returns on uninstalled parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":62955769758067,"sku":"carrier-control-board-fa4cnc042008aaaa","price":149.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-control-board-fa4cnc042008aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}