{"product_id":"carrier-upflow100ua-14-transformer-fnyqxl","title":"OEM Carrier Transformer 50VA 120\/240-24V for UPFLOW100UA%14","description":"\u003ch1\u003eOEM Carrier 50VA Control Circuit Transformer P201-35150 for Model UPFLOW100UA%14\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM factory-specified step-down transformer for the \u003cstrong\u003eCarrier UPFLOW100UA%14\u003c\/strong\u003e air handler. The transformer converts incoming line voltage (120\/208\/240 VAC) to a safe 24V AC signal that powers the control board, thermostat, and all low-voltage control circuits throughout the system. When this transformer fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, a system that won't energize at all, tripped low-voltage fuses, or intermittent lockouts with no error codes. Replacing it with the correct OEM unit restores full control circuit integrity immediately.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 50 VA rating | Primary: 120\/208\/240 VAC multi-tap | Secondary: 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 OEM Carrier\/Totaline transformer (P201-35150) is factory-wound to exact VA and voltage tolerances. Generic transformers often fall short of rated VA under load, causing nuisance tripping of the secondary fuse and premature control board damage — especially in multi-stage systems drawing full 50VA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Shut off ALL power at the breaker and air handler disconnect before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install), wire nuts or push-in connectors. Label all low-voltage wires before disconnecting. Confirm primary tap matches your supply voltage before energizing.\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 Factory-matched replacement for Carrier model \u003cstrong\u003eUPFLOW100UA%14\u003c\/strong\u003e air handlers. Cross-references: Totaline P201-35150, also identified by Carrier part alias HCTY156D0LS11102. Verify your unit's data plate shows 120\/208\/240V primary and 24V secondary before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640236102003,"sku":"CARRIE-UPFLOW100UA%14-TRANSFORMER-P201-35150","price":56.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640236134771,"sku":"CARRIE-UPFLOW100UA%14-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_4c0e3e97-9287-429d-bf9f-6148ac840271.jpg?v=1782942855","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow100ua-14-transformer-fnyqxl","provider":"National HVAC Parts","version":"1.0","type":"link"}