{"product_id":"carrier-ph3znb030000aa-control-board-15t5bk","title":"OEM Carrier Defrost Control Board HK32EA007 for PH3ZNB030000AA","description":"\u003ch1\u003eOEM Carrier Defrost Control Board HK32EA007 for Model PH3ZNB030000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM defrost control board for the \u003cstrong\u003eCarrier PH3ZNB030000AA\u003c\/strong\u003e heat pump. The defrost control board monitors outdoor coil temperature and ambient conditions, initiating timed or demand-based defrost cycles to prevent ice buildup on the outdoor unit. When this board fails, you'll typically experience a heavily iced outdoor coil, a heat pump stuck in defrost mode, no defrost cycle initiating at all, or a system lockout with a flashing fault code on the thermostat or control board itself.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM Part Number HK32EA007 | Factory-matched defrost timing and temperature thresholds | Compatible with 24V control circuit | Designed for R-410A heat pump systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM board uses factory-programmed logic for defrost initiation and termination intervals. Aftermarket boards may use generic timing that leads to over-defrosting (efficiency loss) or under-defrosting (coil icing), shortening compressor life significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting low-voltage control wiring and documenting all terminal positions before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera for wiring photos, multimeter to verify 24V supply. Always disconnect power at the disconnect box before servicing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed by 3 PM ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for \u003cstrong\u003eCarrier model PH3ZNB030000AA\u003c\/strong\u003e heat pump condensers. Confirm OEM part number HK32EA007 against your unit's data plate or existing board label prior to ordering. Our fitment team is available to verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641339728243,"sku":"CARRIE-PH3ZNB030000AA-CONTROL_BOARD-HK32EA007","price":181.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641339761011,"sku":"CARRIE-PH3ZNB030000AA-CONTROL_BOARD-HK32EA007-GEN","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-HK32EA007_26a70811-a487-4193-bb31-03bfa90276ea.jpg?v=1775027006","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3znb030000aa-control-board-15t5bk","provider":"National HVAC Parts","version":"1.0","type":"link"}