{"product_id":"carrier-ph11ja042000aaaa-transformer-h4oyjb","title":"OEM Carrier Control Transformer 60VA 115\/208\/230V-24V — PH11JA042000AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 60VA 115\/208\/230V–24V for Model PH11JA042000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM control transformer for the \u003cstrong\u003eCarrier PH11JA042000AAAA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down high-voltage primary power (115, 208, or 230V AC) to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactors, relays, and safety switches. When this transformer fails, the system goes completely dead: the thermostat loses power, no call for heat or cooling is processed, and the unit will not start. A shorted transformer may also trip the system fuse or breaker on the low-voltage side.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 60 VA power rating | Primary voltage: 115\/208\/230 VAC (multi-tap) | Secondary voltage: 24 VAC | Foot-mount configuration | 50\/60 Hz | OEM Part# HT01AW229\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part (FAP). OEM transformers are wound to exact VA and voltage tolerances to protect downstream control components. Undersized or off-tolerance generic units can cause erratic thermostat behavior, nuisance tripping, or accelerated board failures.\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, multimeter, wire nuts or spade terminals. Always photograph existing wiring before disconnecting. Confirm correct primary tap connection for your supply voltage (115V, 208V, or 230V).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the direct OEM replacement for \u003cstrong\u003eCarrier model PH11JA042000AAAA\u003c\/strong\u003e packaged heat pump units. Cross-references include HT01AW229A. Verify your unit's supply voltage and confirm the 60VA rating on your existing transformer's data label before ordering. Our HVAC parts specialists are available to confirm fitment — just reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641975329139,"sku":"CARRIE-PH11JA042000AAAA-TRANSFORMER-HT01AW229","price":162.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641975361907,"sku":"CARRIE-PH11JA042000AAAA-TRANSFORMER-HT01AW229-GEN","price":143.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01AW229_c665ee6b-aae9-438f-8d0b-9b07614e2140.jpg?v=1775026076","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph11ja042000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}