{"product_id":"carrier-ph12na024000aaaa-transformer-h4oyjb","title":"OEM Carrier 40VA Transformer HT01AW229 for PH12NA024000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01AW229 for Model PH12NA024000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PH12NA024000AAAA\u003c\/strong\u003e heat pump system. The transformer steps down 120V line voltage to the 24V AC signal that powers the control board, thermostat, and all low-voltage control circuits. When this component fails, the entire control circuit goes dead — the thermostat will appear unresponsive, the system won't call for heating or cooling, and nothing will operate despite line power being present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory OEM tolerance | Matches original mounting footprint and terminal configuration for the PH12NA024000AAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage specifications. Aftermarket units frequently run under-rated VA, causing voltage sag under load, nuisance tripping, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Always photograph or label wiring before disconnecting terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory 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 Designed for Carrier model \u003cstrong\u003ePH12NA024000AAAA\u003c\/strong\u003e. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you order — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641969168755,"sku":"CARRIE-PH12NA024000AAAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641969201523,"sku":"CARRIE-PH12NA024000AAAA-TRANSFORMER-HT01AW229-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01AW229_583f5ad1-0b94-4c15-ad06-87cb732b89ed.jpg?v=1775016501","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na024000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}