{"product_id":"carrier-yac36100yac302-transformer-h30299","title":"OEM Carrier Transformer 120V–24V 40VA for YAC36100YAC302","description":"\u003ch1\u003eOEM Carrier Transformer 120V–24V 40VA for Model YAC36100YAC302\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BD201\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier YAC36100YAC302\u003c\/strong\u003e unit. The transformer converts incoming 120V line voltage down to the 24V signal voltage required to power the entire low-voltage control circuit — including the thermostat, contactor coil, and all safety safeties. When this transformer fails, nothing works: the thermostat goes dark, the system refuses to respond to any calls for heating or cooling, and you may find a blown fuse on the control board caused by a shorted secondary winding.\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 OEM part number: HT01BD201 | Carrier-matched terminals for direct plug-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the exact factory transformer Carrier installs at the production line. OEM units are wound to precise VA tolerances, protecting downstream components. Generic transformers frequently underperform on VA output, causing nuisance lockouts and premature contactor coil burnout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire nuts or spade connectors. Label all wiring before disconnecting and verify polarity on the secondary side before powering up.\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 Directly fits Carrier model \u003cstrong\u003eYAC36100YAC302\u003c\/strong\u003e. Always confirm your unit's control board input voltage and VA requirement on the data plate or wiring diagram before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640201695603,"sku":"CARRIE-YAC36100YAC302-TRANSFORMER-HT01BD201","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640201728371,"sku":"CARRIE-YAC36100YAC302-TRANSFORMER-HT01BD201-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD201_dd1908ae-04f7-42b1-89ef-1f4573ad72f9.jpg?v=1775041124","url":"https:\/\/nationalhvacparts.com\/products\/carrier-yac36100yac302-transformer-h30299","provider":"National HVAC Parts","version":"1.0","type":"link"}