{"product_id":"carrier-ph12na03600gacaa-transformer-h4oyjb","title":"OEM Carrier Control Transformer 40VA 120V\/24V for PH12NA03600GACAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model PH12NA03600GACAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH12NA03600GACAA\u003c\/strong\u003e heat pump system. The transformer steps down 120V line voltage to the 24V signal voltage required to power the control board, thermostat circuit, and all low-voltage switching components. When this transformer fails, the entire control circuit goes dead — the thermostat will appear unresponsive, no contactor will pull in, and the system will not heat or cool regardless of demand.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 transformer | OEM part number HT01AW229 | Factory-matched output tolerance for reliable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer, wound to exact factory VA and voltage specifications. Generic transformers may be under-rated in VA, causing premature burnout under full low-voltage load — especially on systems with zone controls or communicating thermostats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all 24V wiring connections before removal. Verify output voltage with a multimeter after installation before reassembling the unit.\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 the Carrier \u003cstrong\u003ePH12NA03600GACAA\u003c\/strong\u003e heat pump. Always verify the VA rating and primary\/secondary voltages on your unit's data plate or wiring diagram before ordering to ensure correct fitment. Our technical team is available to confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641954816371,"sku":"CARRIE-PH12NA03600GACAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641954849139,"sku":"CARRIE-PH12NA03600GACAA-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_ece9c6b4-914f-4f66-88dc-706459d19861.jpg?v=1775025387","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na03600gacaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}