{"product_id":"carrier-ph12na02400gadaa-contactor-1iwybu","title":"OEM Carrier Contactor 1-Pole 25A 24V for PH12NA02400GADAA","description":"\u003ch1\u003eOEM Carrier 1-Pole Contactor 25A 24V Coil for Model PH12NA02400GADAA (HN51KB024)\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier contactor is the factory-specified replacement part for the \u003cstrong\u003eCarrier PH12NA02400GADAA\u003c\/strong\u003e heat pump \/ condensing unit. The contactor is a high-voltage relay controlled by the 24V thermostat circuit — when your thermostat calls for cooling or heating, the contactor closes its contacts to energize the compressor and\/or condenser fan motor. A failed contactor is one of the most common causes of a system that won't turn on at all, runs continuously without shutting off, or produces a loud buzzing\/chattering noise from the electrical cabinet. Replacing it restores full high-voltage switching control to the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 1-Pole | 25A Full Load Amps (FLA) | 24V 50\/60Hz Coil | Definite Purpose Contactor | OEM Part # HN51KB024\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine OEM contactors feature precision-machined silver-alloy contact tips and factory-rated coil windings that meet exact Carrier specifications. Generic aftermarket units often use subgrade contact materials prone to pitting, welding, and premature coil burnout — costing far more in callbacks than the price difference.\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: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring terminals before disconnecting. Transfer line, load, and 24V coil leads one at a time to the new contactor to avoid miswiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct factory replacement for \u003cstrong\u003eCarrier model PH12NA02400GADAA\u003c\/strong\u003e. Also cross-references Carrier\/Bryant\/Payne family units calling for a 1-pole, 24V, 25A definite purpose contactor. Always verify amperage and coil voltage on your unit's wiring diagram or data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you're unsure.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641962353011,"sku":"CARRIE-PH12NA02400GADAA-CONTACTOR-HN51KB024","price":72.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641962385779,"sku":"CARRIE-PH12NA02400GADAA-CONTACTOR-HN51KB024-GEN","price":63.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN51KB024_d045a565-eea2-4716-a0da-891ed413ed63.jpg?v=1775021368","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na02400gadaa-contactor-1iwybu","provider":"National HVAC Parts","version":"1.0","type":"link"}