{"product_id":"carrier-ph12na02400gabaa-transformer-h4oyjb","title":"OEM Carrier Control Transformer 60VA 115\/208\/230V-24V — PH12NA02400GAB","description":"\u003ch1\u003eOEM Carrier 60VA Control Transformer HT01AW229 for Model PH12NA02400GABAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PH12NA02400GABAA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down high-voltage primary power (115\/208\/230V) to the 24V AC signal that powers the entire control circuit — including the thermostat, contactor coil, reversing valve, and all safety switches. When this transformer fails, the result is a completely unresponsive system: no thermostat communication, no staging, no operation whatsoever. A dead 24V circuit almost always points to a failed transformer or a downstream short that has blown its internal fuse.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 60 VA power rating | 115\/208\/230 VAC primary voltage | 24 VAC secondary voltage | 50\/60 Hz | Foot-mount configuration | OEM part number HT01AW229 \/ HT01AW229A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part. OEM transformers are wound and insulated to exact VA and impedance tolerances for the PH12NA02400GABAA. Generic substitutes frequently run under-rated VA, causing voltage sag under load and premature secondary-winding failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before proceeding. Tools needed: multimeter, flathead and Phillips screwdrivers, needle-nose pliers, wire nuts or terminal connectors. Always photograph all wire terminations before removal. Check for downstream shorts (shorted contactor coil, stuck relay) before installing the new transformer — replacing a transformer without correcting the root cause will blow the new unit immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on parts. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and tested for the \u003cstrong\u003eCarrier PH12NA02400GABAA\u003c\/strong\u003e packaged heat pump. Cross-references include HT01AW229A. Verify primary voltage tap (115V, 208V, or 230V) matches your unit's supply voltage before installation — this transformer supports all three via selectable primary taps. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641963925875,"sku":"CARRIE-PH12NA02400GABAA-TRANSFORMER-HT01AW229","price":162.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641963958643,"sku":"CARRIE-PH12NA02400GABAA-TRANSFORMER-HT01AW229-GEN","price":142.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01AW229_afb49de8-32c0-4a45-88b8-d746e6c79e7a.jpg?v=1775026083","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na02400gabaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}