{"product_id":"carrier-ph12na042000abaa-transformer-h4oyjb","title":"OEM Carrier Transformer 60VA 115\/208\/230V–24V for PH12NA042000ABAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 60VA 115\/208\/230V–24V for Model PH12NA042000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM foot-mounted control transformer (part# \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH12NA042000ABAA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down line voltage (115, 208, or 230V primary) to a stable \u003cstrong\u003e24V secondary signal\u003c\/strong\u003e that powers the entire low-voltage control circuit — including the thermostat, contactor coil, reversing valve, and all safety controls. When the transformer fails, nothing in the control circuit responds: the thermostat goes blank, the system refuses to start, or the unit blows the 3A control fuse repeatedly. Replacing it with the genuine OEM part restores exact factory voltage regulation and protects downstream components from over- or under-voltage damage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 60 VA rating | Primary: 115 \/ 208 \/ 230V AC | Secondary: 24V AC | Foot-mount configuration | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01AW229 is built to Carrier's exact VA rating and insulation class. Undersized aftermarket transformers overheat under full control-circuit load, blow fuses, and can damage boards — OEM eliminates that risk entirely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power and verify zero voltage before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wires before disconnecting. Discharge any capacitors in the unit before working near the control board.\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 Direct OEM replacement for Carrier model \u003cstrong\u003ePH12NA042000ABAA\u003c\/strong\u003e packaged heat pump. Verify your unit's data plate lists a 115\/208\/230V primary, 24V secondary, 60VA transformer before ordering. Cross-references include HT01AW229A. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641953243507,"sku":"CARRIE-PH12NA042000ABAA-TRANSFORMER-HT01AW229","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641953276275,"sku":"CARRIE-PH12NA042000ABAA-TRANSFORMER-HT01AW229-GEN","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01AW229_87eafbcc-1c30-453a-adf9-1ecdb86c4bed.jpg?v=1782943135","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na042000abaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}