{"product_id":"carrier-c48a202052-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A202052 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Circuit Transformer for Model C48A202052\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C48A202052\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V signal required by the thermostat, control board, contactor coil, and all low-voltage control components. When this transformer fails, the entire control circuit goes dead — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no status LEDs illuminate on the control board. It is often the first component to inspect when a unit powers on but does nothing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V | Secondary voltage: 24V | VA rating: 40VA | OEM part number: HT01BD236 | Factory-matched windings and thermal overload protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to Carrier's exact VA and impedance specifications, ensuring proper coil voltage delivery under full load. Generic transformers rated at 40VA often fall short under simultaneous contactor and board demand, causing nuisance lockouts and premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Label all wiring before disconnecting. Secondary circuit wiring is straightforward; primary wiring must remain properly strain-relieved.\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 Designed specifically for the Carrier \u003cstrong\u003eC48A202052\u003c\/strong\u003e packaged unit. Verify your unit's data plate shows 120V primary control circuit voltage before ordering. If your existing transformer shows signs of overheating, also inspect the secondary circuit for shorts before installing the new unit. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909763584371,"sku":"CARRIE-C48A202052-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909763617139,"sku":"CARRIE-C48A202052-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_c5d402b6-d64f-463d-8a21-54a71627cb67.jpg?v=1782939106","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a202052-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}