{"product_id":"carrier-c48a202551-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A202551 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C48A202551\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eC48A202551\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, control board, and safety circuits. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any calls for heating or cooling, and no components will energize. It is one of the most overlooked yet critical components in the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched to Carrier C48A202551 electrical specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA rating and insulation class. Generic transformers often run under-rated VA, causing overheating and premature failure — especially in systems with multiple 24V accessories such as zone dampers or humidifiers.\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, needle-nose pliers, multimeter. Verify primary and secondary voltages after installation before restoring full power. Always label or photograph existing wiring before disconnecting terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC48A202551\u003c\/strong\u003e packaged unit. Confirm your unit's data plate shows matching primary voltage (120V) before ordering. If you are unsure of fitment, our HVAC parts specialists can verify compatibility before you purchase. Order today and get back to comfort fast — \u003cstrong\u003ein stock and ships today\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909762896243,"sku":"CARRIE-C48A202551-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909762929011,"sku":"CARRIE-C48A202551-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_cc6f57fc-17bd-4b08-9f4f-8607347841f1.jpg?v=1782939113","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a202551-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}