{"product_id":"carrier-ph13nb03700gaaaa-transformer-h4oyjb","title":"OEM Carrier 60VA Transformer 115\/208\/230V–24V for PH13NB03700GAAAA","description":"\u003ch1\u003eOEM Carrier 60VA Control Transformer HT01AW229 for Model PH13NB03700GAAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM factory-authorized replacement control transformer for the \u003cstrong\u003eCarrier PH13NB03700GAAAA\u003c\/strong\u003e heat pump system. The transformer steps down high-voltage line power (115, 208, or 230V primary) to the 24V AC signal that powers the entire control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely unresponsive: the thermostat goes blank, the unit won't start, and no control functions operate. It is a foot-mounted design rated at \u003cstrong\u003e60 VA\u003c\/strong\u003e, making it a higher-capacity transformer suited for multi-stage or zone-controlled systems.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 60 VA rating | Primary: 115 \/ 208 \/ 230 VAC (multi-tap) | Secondary: 24 VAC | Foot-mounted configuration | OEM Part Number: HT01AW229\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a Factory Authorized Part built to Carrier's exact VA rating and insulation class. Generic transformers rated at 40VA are commonly misapplied to this unit — underrating causes thermal overload and repeat failure within months.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all wiring before disconnecting. Primary tap selection must match your supply voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse — get back up and running fast.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and factory-matched for the \u003cstrong\u003eCarrier PH13NB03700GAAAA\u003c\/strong\u003e heat pump. Verify your unit's supply voltage (115V, 208V, or 230V) before selecting the correct primary tap. Cross-references: HT01AW229A. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641916313971,"sku":"CARRIE-PH13NB03700GAAAA-TRANSFORMER-HT01AW229","price":280.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641916346739,"sku":"CARRIE-PH13NB03700GAAAA-TRANSFORMER-HT01AW229-GEN","price":246.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01AW229_6efcb567-2944-4b8f-8f8b-9dbe961c7f7a.jpg?v=1775016742","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13nb03700gaaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}