{"product_id":"carrier-ph3gna042000aa-control-board-hxunht","title":"OEM Carrier Defrost Control Board CESO130076-00 for PH3GNA042000AA","description":"\u003ch1\u003eOEM Carrier Defrost Control Board CESO130076-00 \/ HK660003 for Model PH3GNA042000AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier defrost control circuit board is the factory-specified replacement for the \u003cstrong\u003eCarrier PH3GNA042000AA\u003c\/strong\u003e heat pump. The defrost control board serves as the operational brain of your heat pump's defrost system — continuously monitoring sensors and safety switches, coordinating compressor operation, reversing valve sequencing, and executing timed defrost cycles to prevent coil icing. When this board fails, symptoms typically include the unit failing to enter or exit defrost mode, the system locking out entirely, erratic short-cycling, or a complete loss of heating and cooling function.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Numbers:\u003c\/strong\u003e CESO130076-00 (primary) | HK660003 (cross-reference) | Also cross-references: CEPL130492-01, HK50AA041 | Factory-direct Carrier replacement — not a third-party substitute\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM boards are programmed with the exact defrost timing intervals, sensor thresholds, and fault-code logic specified by Carrier engineering. Aftermarket boards may use generalized firmware that can cause premature defrost cycling, missed fault codes, or compressor over-run — shortening the life of your system significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting 24V control wiring and line-voltage harnesses. Always disconnect power at the breaker before beginning. Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, multimeter (to verify 24VAC to board), and a phone camera to document wiring positions before removal. Transfer any jumper settings from the old board to the new one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our warehouse in original Carrier factory packaging.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier PH3GNA042000AA\u003c\/strong\u003e packaged heat pump. This board is also compatible with select Bryant and Payne heat pump models sharing the same control platform — verify your unit's data plate and existing part number before ordering. Our team is available to confirm fitment. \u003cstrong\u003eOrder now — in stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641381704051,"sku":"CARRIE-PH3GNA042000AA-CONTROL_BOARD-CESO130076-00","price":206.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641381736819,"sku":"CARRIE-PH3GNA042000AA-CONTROL_BOARD-CESO130076-00-GEN","price":181.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-CESO130076-00_fd73b70f-45c0-4418-8b96-84e63ba3bfaf.jpg?v=1775026292","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3gna042000aa-control-board-hxunht","provider":"National HVAC Parts","version":"1.0","type":"link"}