{"product_id":"carrier-py3gna024040aa-contactor-1iwybu","title":"OEM Carrier Contactor 24V 2-Pole for PY3GNA024040AA — HN51KB024","description":"\u003ch1\u003eOEM Carrier Contactor 24V 2-Pole for Model PY3GNA024040AA (HN51KB024)\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM contactor for the \u003cstrong\u003eCarrier PY3GNA024040AA\u003c\/strong\u003e split-system air conditioner. The contactor is the high-voltage relay that receives the 24V signal from your thermostat and switches line-voltage power to the compressor and condenser fan motor. When it fails — due to worn contacts, pitting, or a stuck plunger — the system will either refuse to turn on at all, run continuously without cycling off, or produce a loud chattering or buzzing sound at the outdoor unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM Part # HN51KB024 | 2-Pole design | 24V AC coil voltage | Factory-matched contact rating for Carrier PY3GNA024040AA — exact replacement, no modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM contactor uses factory-spec silver-alloy contacts for maximum conductivity and arc resistance. Generic contactors often use lower-grade contact materials that pit and fail faster, especially under the high inrush current of a compressor start.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at both the breaker and the unit disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removing the old contactor — terminal labeling varies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for Carrier model \u003cstrong\u003ePY3GNA024040AA\u003c\/strong\u003e. Always confirm your unit's coil voltage and pole configuration on the existing contactor or data plate before ordering. Our parts specialists are available to verify fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640489529715,"sku":"CARRIE-PY3GNA024040AA-CONTACTOR-HN51KB024","price":68.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640489562483,"sku":"CARRIE-PY3GNA024040AA-CONTACTOR-HN51KB024-GEN","price":60.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN51KB024_4dbcbbb4-f0a8-4686-bbd0-92ac23bd1ae9.jpg?v=1775022032","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna024040aa-contactor-1iwybu","provider":"National HVAC Parts","version":"1.0","type":"link"}