{"product_id":"carrier-yac1840yacx501k-transformer-fnyqxl","title":"OEM Carrier Transformer 50VA 120\/240-24V for YAC1840YACX501K","description":"\u003ch1\u003eOEM Carrier 50VA Control Transformer P201-35150 for Model YAC1840YACX501K\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM step-down transformer for the \u003cstrong\u003eCarrier YAC1840YACX501K\u003c\/strong\u003e, sold under Carrier part number \u003cstrong\u003eP201-35150\u003c\/strong\u003e (also catalogued as a Totaline part). The transformer converts high-voltage line power — 120V, 208V, or 240V AC — down to a safe 12\/24V AC output that powers your system's control board, thermostat, and all low-voltage switching circuits. When this transformer fails, the entire control circuit goes dark: the thermostat goes blank, the system becomes completely unresponsive, and no heating or cooling call can be processed. A failed transformer is often mistaken for a bad control board, so always verify transformer output voltage first before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 50 VA rating | Primary voltage: 120\/208\/240 VAC multi-tap | Secondary voltage: 12\/24 VAC | 60 Hz single-phase | CSA listed | Dimensions: 3.8\"L × 3.1\"W × 2.2\"H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory-authorized OEM unit is wound to exact VA and voltage tolerance specifications. Generic transformers frequently use lower-grade core laminations that run hotter, degrade faster under load, and can produce voltage sag that causes nuisance lockouts on sensitive control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Line voltage is present at the primary terminals. \u003cstrong\u003eShut off power at the breaker and verify with a multimeter before touching any wiring.\u003c\/strong\u003e Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade terminals. Photograph all wiring connections before disconnecting. Confirm secondary output voltage (should read ~24V AC) after installation before closing the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer 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 Factory-specified replacement for Carrier model \u003cstrong\u003eYAC1840YACX501K\u003c\/strong\u003e. The multi-tap primary (120\/208\/240V) makes this transformer suitable across a wide range of Carrier equipment sharing the P201-35150 specification — always confirm your unit's supply voltage and VA requirement on the data plate before ordering. Need help verifying fitment? Our HVAC parts specialists are standing by.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640214835571,"sku":"CARRIE-YAC1840YACX501K-TRANSFORMER-P201-35150","price":56.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640214868339,"sku":"CARRIE-YAC1840YACX501K-TRANSFORMER-P201-35150-GEN","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-P201-35150_8f935314-33e0-4d00-9da0-5d0b5b022ff1.jpg?v=1782942888","url":"https:\/\/nationalhvacparts.com\/products\/carrier-yac1840yacx501k-transformer-fnyqxl","provider":"National HVAC Parts","version":"1.0","type":"link"}