{"product_id":"carrier-ph13nr04200gafaa-transformer-h4oyjb","title":"OEM Carrier 24V Transformer HT01AW229 for PH13NR04200GAFAA","description":"\u003ch1\u003eOEM Carrier 24V Control Transformer HT01AW229 for Model PH13NR04200GAFAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH13NR04200GAFAA\u003c\/strong\u003e heat pump system. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, reversing valve, and safety switches. When this component fails, the result is total loss of thermostat response: the system won't heat, cool, or communicate with any controls at all. A blown transformer is often caused by a short in the low-voltage wiring or a faulty contactor coil drawing excessive current, so always inspect downstream wiring before installing the replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | Factory-matched to Carrier PH13NR04200GAFAA low-voltage control circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit uses factory-wound copper coils calibrated to exact VA tolerances. Generic transformers often underperform under full-load conditions, leading to voltage sag that causes nuisance lockouts and premature board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label all low-voltage wires before disconnecting. Verify 24V output with a multimeter before re-energizing the control circuit.\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 climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePH13NR04200GAFAA\u003c\/strong\u003e heat pump. Always verify part number on the existing transformer's label and cross-reference with your unit's wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you buy if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641862345075,"sku":"CARRIE-PH13NR04200GAFAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641862377843,"sku":"CARRIE-PH13NR04200GAFAA-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_df425cac-2b26-4d94-ae01-a92c44309d51.jpg?v=1775015792","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13nr04200gafaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}