{"product_id":"carrier-py3gna030040aa-contactor-1iwybu","title":"OEM Carrier Contactor 1-Pole 25A 24V Coil HN51KB024 — PY3GNA030040AA","description":"\u003ch1\u003eOEM Carrier 1-Pole 25 Amp Contactor (HN51KB024) for Model PY3GNA030040AA\u003c\/h1\u003e\u003cp\u003eThis OEM contactor is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNA030040AA\u003c\/strong\u003e condensing unit. The contactor acts as the high-voltage relay in your system's control circuit: when the thermostat calls for cooling, the 24V coil energizes and closes the contact points, sending line voltage to the compressor and condenser fan motor. A failed contactor typically results in the outdoor unit failing to respond to the thermostat call, a humming compressor that won't start, or — in the case of welded\/pitted contacts — a unit that runs continuously and won't shut off.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 1-Pole configuration | 25 Amp load rating | 24V AC coil voltage | OEM part number HN51KB024 | Factory-matched contact grade and coil resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM contactor. Generic aftermarket contactors often use lower-grade contact alloys that pit and weld faster under high-cycle loads — especially in hot climates. OEM ensures factory coil pull-in voltage and contact gap specifications are met.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching terminals. Photograph all wiring before removal. Tools needed: flathead screwdriver, needle-nose pliers, multimeter. Swap line, load, and coil leads one at a time to avoid miswiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse — get your system back online fast.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for Carrier model \u003cstrong\u003ePY3GNA030040AA\u003c\/strong\u003e. Verify OEM part number HN51KB024 against your unit's wiring diagram or parts list before ordering. Our fitment team is available to confirm compatibility — don't hesitate to reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640485597555,"sku":"CARRIE-PY3GNA030040AA-CONTACTOR-HN51KB024","price":80.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640485630323,"sku":"CARRIE-PY3GNA030040AA-CONTACTOR-HN51KB024-GEN","price":70.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN51KB024_dcafaa39-354f-4063-b352-f9483ba93bef.jpg?v=1775021358","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna030040aa-contactor-1iwybu","provider":"National HVAC Parts","version":"1.0","type":"link"}