{"product_id":"carrier-c4850c50z3040900-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C4850C50Z3040900","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z3040900\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z3040900\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V signal voltage that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no diagnostic LEDs will illuminate on the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Factory-matched impedance and thermal protection | OEM part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer, wound and rated to exact factory specifications. Generic transformers frequently underperform their stated VA rating, causing nuisance tripping of the internal thermal cutout and premature failure under normal system load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 0V before touching wiring). Label or photograph all low-voltage wiring connections prior to removal. Incorrect polarity on reinstall can damage the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC4850C50Z3040900\u003c\/strong\u003e packaged unit. Verify primary voltage, secondary voltage, and VA rating against your unit's data plate and wiring diagram before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you purchase — no guesswork, no returns. \u003cstrong\u003eOrder today and your part ships the same business day.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909795697011,"sku":"CARRIE-C4850C50Z3040900-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909795729779,"sku":"CARRIE-C4850C50Z3040900-TRANSFORMER-HT01BD236-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD236_9cc36b70-febb-4ebf-9b23-8eed211468f6.jpg?v=1782939295","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z3040900-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}