{"product_id":"carrier-ph13pr04800gacaa-transformer-h4oyjb","title":"OEM Carrier 40VA Transformer 120V-24V HT01AW229 — PH13PR04800GACAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01AW229 for Model PH13PR04800GACAA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PH13PR04800GACAA\u003c\/strong\u003e packaged heat pump unit. Its job is to convert 120V line voltage down to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, absolutely nothing in the control system responds: the thermostat goes blank, the contactor won't energize, and the system will not heat or cool. It is often the first component to diagnose when a unit shows zero control activity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V secondary | 40VA rated | OEM part number HT01AW229 | Factory-matched output for Carrier low-voltage control circuits\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 tolerances. Generic transformers can under-deliver on VA capacity, causing voltage sag that leads to nuisance lockouts, contactor chatter, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect and lock out power before servicing. Tools needed: multimeter (to verify 24V output post-install), insulated screwdrivers, wire nuts or terminals. Always verify secondary voltage with a meter before restoring full system power.\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 NationalHVACParts.com warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePH13PR04800GACAA\u003c\/strong\u003e packaged heat pump. Always confirm your existing transformer's primary voltage, secondary voltage, and VA rating on the unit's data plate or wiring diagram before ordering. Our HVAC parts specialists are available to verify fitment — just ask before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641839473011,"sku":"CARRIE-PH13PR04800GACAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641839505779,"sku":"CARRIE-PH13PR04800GACAA-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_e3b338f6-7863-49c4-9606-f7dc412ef3ff.jpg?v=1775016300","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13pr04800gacaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}