{"product_id":"carrier-ph3znb036000aa-contactor-1iwxlq","title":"OEM Carrier Contactor 1-Pole 24V 30A for PH3ZNB036000AA","description":"\u003ch1\u003eOEM Carrier 1-Pole Contactor 24V 30A — HN51KC024 for Model PH3ZNB036000AA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier contactor (part# \u003cstrong\u003eHN51KC024\u003c\/strong\u003e), the factory-specified high-voltage relay for the \u003cstrong\u003eCarrier PH3ZNB036000AA\u003c\/strong\u003e heat pump system. The contactor is the critical switching component that receives a 24V signal from the thermostat and closes to deliver line voltage to the compressor and\/or condenser fan motor. When the contactor fails — through burned contacts, a welded-shut coil, or a failed coil — you'll typically experience symptoms such as: the outdoor unit not energizing at all, the system humming without the compressor starting, or the unit running continuously without shutting off.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 1-Pole (single-pole) | 24 VAC coil voltage | 30 Amps FLA | 150 Amps LRA | 50\/60 Hz | Factory OEM part number HN51KC024\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Carrier contactors are manufactured to exact factory tolerances with silver-alloy contacts rated for the full 30A load. Generic aftermarket contactors frequently use lower-grade contact materials that pit and burn prematurely, leading to repeat failures within a single season.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph existing wiring before disconnecting any leads. After installation, verify contactor pull-in by confirming 24V across coil terminals on a thermostat call.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Backed by a 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-specified for the \u003cstrong\u003eCarrier PH3ZNB036000AA\u003c\/strong\u003e heat pump system. Also cross-references to Carrier Bryant and Payne units listing HN51KC024 in their official parts list. Verify your unit's wiring diagram and data plate before ordering — our team is available to confirm fitment prior to purchase.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641337106803,"sku":"CARRIE-PH3ZNB036000AA-CONTACTOR-HN51KC024","price":65.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641337139571,"sku":"CARRIE-PH3ZNB036000AA-CONTACTOR-HN51KC024-GEN","price":57.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN51KC024_de269c54-487e-4fa8-b6bd-a1728fdee02d.jpg?v=1775021330","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3znb036000aa-contactor-1iwxlq","provider":"National HVAC Parts","version":"1.0","type":"link"}