{"product_id":"carrier-control-board-fb4cnp042000aaaa","title":"OEM Carrier Control Board HK42FZ034 for Model FB4CNP042000AAAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Control Board HK42FZ034 for Model FB4CNP042000AAAA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier control board (HK42FZ034) is the brain of the Carrier FB4CNP042000AAAA fan coil unit, governing blower timing, relay sequencing, safety lockouts, and thermostat communication. A faulty board commonly shows up as a blower that won't run, intermittent operation, stored fault codes, or a system that ignores thermostat calls. This genuine Carrier replacement matches factory specifications exactly, restoring proper control logic and reliable indoor airflow. Installation is moderate difficulty and recommended for a licensed HVAC technician: shut off power at the disconnect, photograph the existing wire routing, transfer each connector to the new board, and secure it to the mounting standoffs. No special programming is needed. Choosing the OEM board avoids the compatibility headaches of universal replacements and keeps your equipment warranty intact. We stock this part and ship same-day on all orders placed before 3PM CST so your repair isn't delayed. Get dependable, quiet blower performance back in your FB4CNP042000AAAA with the genuine Carrier control board.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FB4CNP042000AAAA.\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":62950021955955,"sku":"carrier-control-board-fb4cnp042000aaaa","price":189.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-control-board-fb4cnp042000aaaa","provider":"National HVAC Parts","version":"1.0","type":"link"}